How many covalent bonds does and oxygen stone usually make in forming covalent compounds?
a) 5
b) 3
c) 2
d)4
e)1

Answers

Answer 1

Answer: Oxygen usually forms two covalent bonds or a covalent double bond.

Explanation:

A covalent bond is formed by the sharing of 2 electrons, 1 electron from each of the atoms sharing their electrons.

The number of bonds that each element can form depends on the number of valence (outermost) electrons it contains. Oxygen has 6 electrons in its valence shell and needs 2 more electrons thereby forming a double bond.


Related Questions

1) ____ NaCl + ____ KOH  ____ NaOH + ____ KCl


2) ____ MgO + ____ Li2SO4  ____ MgSO4 + ____ Li2O


3) ____ H2O  ____ H2 + ____ O2


4) ____ RbF + ____ Be(NO3)2  ____ RbNO3 + ____ BeF2


5) ____ Ag +____ Cu(NO3)2  ____ AgNO3 + ____ Cu


6) ____ CO2 + ____ Cl2  ____ CCl4 + ____ O2


7) ____ CuSO4 + ____ HCN  ____ Cu(CN)2 + ____ H2SO4


8) ____ Ga2O3 + ____ Li  ____ Li2O + ____ Ga


9) ____ BaF2 + ____ Na2S  ____ BaS2 + ____ NaF


10) ____ NH3 ____ N2 + ____ H2


please solve as many as you can, the boxes are arrows

Answers

Answer:

hope it's helpful to you .

your 9th question is wrong but I did it correctly

it's not BaS2 it's BaS

Final answer:

The student's inquiry involved balancing a series of chemical equations, a fundamental concept in stoichiometry. Each balanced equation ensures that there is the same number of each element's atoms on the reactant side as on the product side, in accordance with the law of conservation of matter.

Explanation:

The questions you've posed involve stoichiometry, a field in chemistry that quantifies the relationships of different substances in a chemical reaction. Balancing chemical equations involves ensuring the conservation of atoms (each element in reactants should be equal to the count of the same element in products). Here are the balanced equations:

2 NaCl + 2 KOH → 2 NaOH + K2Cl2MgO + Li2SO4 → MgSO4 + 2Li2O2 H2O → 2 H2 + O22 RbF + Be(NO3)2 → 2 RbNO3 + BeF22 Ag + Cu(NO3)2 → 2 AgNO3 + CuNo reaction occurs in this case.3 CuSO4 + 6 HCN → 3 Cu(CN)2 + 3 H2SO46 Li + Ga2O3 → 3 Li2O + 2 Ga2 Na2S + BaF2 → BaS + 4 NaF2 NH3 → N2 + 3 H2

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Of the total base sequence in human DNA, what percentage codes for proteins? A) Nearly 50 percent
B) About 5 percent
C) About 90 percent
D) 100 percent

Answers

Answer:

The correct answer is B)About 5 percent

Explanation:

The approximate total size of the human nuclear genome is 3,200,000,000 base pairs. 1 to 1, 4% encode proteins, 24% are non-coding regions and the rest correspond to intergenic regions.

Of the total base sequence in human DNA, only about 5 percent code for proteins (Option B).

DNA is a double helix molecule composed of two long chains of nucleotides.

This molecule (DNA) is composed of sequences that encode proteins called genes and non-coding regions, which often play regulatory functions (i.e., non-coding nucleotide sequences are mainly involved in the regulation of gene expression).

According to the human genome sequencing project, only 5% (or even a lesser proportion) of the human genome encode for proteins, thereby the remaining DNA consists of repetitive non-coding sequences.

In conclusion, of the total base sequence in human DNA, only about 5 percent code for proteins (Option B).

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I'M BEGGING Plzzzzzzz
2 Al + 3 FeO → Al2O3 + 3 Fe

If 379.48 grams of Al2O3 are produced, how many grams of Fe will also be produced?

Answers

Answer:

Fe=625.026g

Molar mass of Al2O3=102g

Molar mass of Fe=168g

102g of Al2O3-168g of Fe

379.48g of Al2O3-xg of Fe

Cross multiply

102x = 168×379.49

102x=63752.64

X= 625.026g

Therefore,the mass of Fe is 625.027g

Explanation:

Which type of spectrum does the illustration A
show?

continuous

bright line

dark line

Answers

Answer:

(A)-Continuous

Continuous type of spectrum does show the illustration A. Therefore, option A is correct.

What does a continuous spectrum show?

A continuous spectrum contains all light wavelengths within a specific range. Hot, dense light sources, such as stars, emit a nearly continuous spectrum of light that travels in all directions and interacts with other materials in space.

Continuous spectra also known as thermal or blackbody spectra are produced by dense gases or solid objects that emit heat. They emit radiation at a wide range of wavelengths, giving the spectra a smooth and continuous appearance.

The visible "electromagnetic spectrum" is a continuous spread of all spectral colors organized by wavelength.

Thus, option A is correct.

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How many moles do you need in HCL

Answers

You will need 1 moles. Hope this helps!!
The answer is
36.46094

What information does a net ionic equation give?
O
A. It lists only the spectator ions that are present.
B. It lists only the components that are ions.
O
C. It lists only the substances that are changed.
D. It lists only the aqueous components of the reaction.

Answers

Answer:

C. It lists only the substances that are changed.

Explanation:

Balanced Chemical equation:

HClO₂(aq) + NaOH(aq) → H₂O(l) + NaClO₂ (aq)

Ionic equation:

H⁺(aq) + ClO₂⁻(aq) + Na⁺(aq) + OH⁻(aq) → H₂O(l) + Na⁺(aq) + ClO₂⁻ (aq)

Net ionic equation:

H⁺(aq) + OH⁻(aq) → H₂O(l)  

The ClO₂⁻(aq) and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form.  This'e why it is written in net ionic equation.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

Final answer:

A net ionic equation lists only the substances that change during a reaction, excluding spectator ions that do not participate in the chemical process. Therefore, the correct answer is C: It lists only the substances that are changed.

Explanation:

A net ionic equation is a chemical equation that shows only the species that actually participate in the reaction. These species are the ions that undergo a chemical or physical change during the reaction, which is different from the spectator ions that do not participate in the reaction. Spectator ions are present in the solution before and after the chemical reaction and do not undergo any change, so they are not included in the net ionic equation.

Correctly answering the student's question, a net ionic equation provides information about option C: It lists only the substances that are changed. This type of equation demonstrates the actual chemical change between the ionic compounds, excluding all the spectator ions that remain unchanged during the reaction process.

Solve the problems. Express your answers to the correct number of significant figures. 2.31/0.790

Answers

Answer:

      [tex]\dfrac{2.31}{0.790}=2.92[/tex]

Explanation:

When you divide two measures, the rule for the number of significant figures of the quotient is to keep the number of significant figures of the measure with least significant figures.

2.31 has three significant figures

0.790 has three significant figures

Then, the asnwer must have three significant figures:

            [tex]\dfrac{2.31}{0.790}\approx 2.92405\approx2.92[/tex]

Since the figure after 2.92 is less than five, you just drop it.

Final answer:

To solve 2.31 ÷ 0.790, divide the numbers and round the result to three significant figures, the least number present in the given values, giving the final answer as 2.92.

Explanation:

To solve the division problem 2.31 ÷ 0.790 with the proper number of significant figures, we must consider the number of significant figures in each of the original numbers. The number 2.31 has three significant figures, and 0.790 has three significant figures as well. When dividing, the number of significant figures in the result should be the same as the number with the least significant figures in the problem.

To get the answer, we divide 2.31 by 0.790:

Perform the division using a calculator: 2.31 ÷ 0.790 = 2.92405063…Round the result to three significant figures because that is the least number of significant figures in the original numbers: 2.92

Therefore, the answer to the problem expressed to the correct number of significant figures and with proper units (if they were provided in the original problem), would be 2.92.

4. The average kinetic energy of water molecules is greatest in
O liquid water at 273 K
O ice at 0°C
O liquid water at 90°C
O steam at 100°C

Answers

Answer:

steam at 100°C

Explanation:

Grandpoint approved

The average kinetic energy of water molecules is greatest in steam at 100°C.

Kinetic energy of water

Water is a polar solvent that has potential energy on its own which can be converted to kinetic energy once the water is in motion.

The kinetic energy is that energy that a moving body possesses.The faster a molecule moves, the more kinetic energy it has, and the higher the measured temperature.

That being said, when the temperature of water is increased, there would be increased molecular motion leading to a higher kinetic energy.

Therefore, the average kinetic energy of water molecules is greatest in steam at 100°C.

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Please Help
In an acid-base reaction, the _______ are a salt and water. A) acid B) base C) reactants D) products

Answers

Answer:

D

Explanation:

In an acid base reaction, the products are salt and water because acid base reactions react to neutralize the acid and base properties, producing a salt.

What charge will an ion of phosphorus form?

Answers

Answer:

A charge of -3

Explanation:

If you look on a periodic table you will find that phosphorus is 3 elements away from the nearest noble gas argon. This means that phosphorus would prefer a charge of -3!

Answer:typically it will be -3

Explanation:

It prefers to take up 3 electrons and thereby become phosphide with a -3 charge. since it is a nonmetal it will take up electrons making it negative as an ion. In order to fill up its last shell, to become stable, to form an octet it will need 3 added electrons which will give it that -3 charge. An atom of phophorus will be neutral, An ion of phsphorus will have a -3 charge.

Balance the following chemical equation if necessary:
V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l)

Answers

Final answer:

The balanced version of the chemical equation V2O5 (s) + HCl (aq) --> VOCl3 (s) + H2O (l) is: V2O5 (s) + 6 HCl (aq) --> 2 VOCl3 (s) + 3 H2O (l). This balance is achieved by ensuring an equal number of each type of atom on both sides of the equation.

Explanation:

To balance the given chemical equation, we need to ensure there are equal numbers of each type of atom on both sides of the equation. Let's start with vanadium (V) and chlorine (Cl) atoms, as they are only in one reactant and one product:

V2O5 (s) + 2 HCl (aq) ---> 2 VOCl3 (s) + H2O (l)

Now we have two vanadium atoms on both sides, but the number of chlorine atoms is not balanced yet. We'll increase the number of hydrochloric acid (HCl) molecules:

V2O5 (s) + 6 HCl (aq) ---> 2 VOCl3 (s) + H2O (l)

Last, let's balance the number of hydrogen (H) and oxygen (O) atoms. We'll also add some water molecules:

V2O5 (s) + 6 HCl (aq) ---> 2 VOCl3 (s) + 3 H2O (l)

So the balanced equation is: V2O5 (s) + 6 HCl (aq) --> 2 VOCl3 (s) + 3 H2O (l).

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Final answer:

The question is about balancing a chemical equation. The balanced equation for V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l) is V2O5 (s) + 6HCl (aq) ---> 2VOCl3 (s) + 3H2O (l)

Explanation:

The subject of this question relates to the balancing of a chemical equation. The chemical equation provided: V2O5 (s) + HCl (aq) ---> VOCl3 (s) + H2O (l) needs to be balanced, that is, the number of atoms of each element on the reactant (left) side of the equation have to equal the number of atoms of each element on the product (right) side of the equation. In this case, the balanced chemical equation would be V2O5 (s) + 6HCl (aq) ---> 2VOCl3 (s) + 3H2O (l)

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• What policies might people put in place to conserve water levels in lakes and aquifers?

Answers

Some policies they might do is to put limits on water usage, like making sure that people don't use too much water in baths and when they are tending to their gardens.

Reduce the use of water can conserve water levels.

Following are the policies that might people put in place to conserve water levels in lakes and aquifers:Dispose of chemicals properly in order to protect the water from contamination.Take used motor oil to a recycling center.Use modern methods of irrigation for irrigating the crops.Take short showers during bathing.Shut water off while brushing teeth.

In conclusion, reduce the use of water can conserve water levels.

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Describe the difference between Al3+
and N3-

Answers

Al3+ is cation due to its positve charge
N3- is an anion due to its negative charge

What are the characteristics of an atom or molecule when in the gas phase

Answers

Answer:vapor

Explanation: Because it is

Answer:

nonrigid shape or volume; highly active and mobile

Explanation:

100 Points!! PLEASE HELP!! PLEASE!! PLEASE!!
The Universe is believed to have been formed from a very dense fireball _____________ of years ago. As the fireball
expanded and cooled stars and galaxies formed. The fireball explosion is often called the ___ ________. The explosion
threw all the material outwards; that is why scientists believe the universe is getting bigger or ____________. Scientists
have confirmed that the Universe is expanding by examining the light given off by stars. Astronomers now know that the
distance to the furthest galaxies is becoming greater as these galaxies are moving away the __________. Stars are
produced from gas clouds or ___________, which contain mainly the element ____________. The type of star produced
depends on the mass of the star. Red _________ are stars formed which have a mass _________ than that of our
____________ .
Hydrogen is the __________ of all stars. During nuclear fusion the hydrogen molecules combine producing
____________, releasing lots of ____________ in the process. How quickly the hydrogen is used up depends on the size
of the star. Massive stars burn hydrogen very quickly. Additional nuclear fusion reactions can convert helium into
elements with larger atoms, for example lithium. However the elements with the largest atoms only form when a star
explodes as a _______________
The amount of energy given out by a star, its luminosity, varies considerably. ____________ dwarfs are stars that have a
very low luminosity, about one hundredth of the Sun. Super giant stars which are very large red giant stars, can give out
as much energy as 1,000,000 Suns. Some scientists believe that our Solar System was once a binary star system. The Sun
was the __________ of the two stars and burnt its fuel slowly, lasting millions of years. The larger star used up all its fuel
and destroyed itself in a supernova explosion, leaving the Sun behind.
The Sun is a very stable star. In a few billion years from now the Sun will use up its fuel supply and start to change. It will
probably expand and form a red giant. Finally, it may form a white dwarf or a ____________ star. When this happens
there will no longer be life on the Earth, but by then we should have found new _________ around other stars.
Your answer choices are fuel, nebula, expanding, less, hydrogen, smaller, energy, Sun, quickest, supernova, homes, white, neutron, giants,
helium, Big Bang, billions

Answers

Answer:
“...very dense fireball *billions* of years ago”.
“... is often called the *Big Bang*”.
“... is getting bigger or *expanding*”.
“... galaxies are moving away the *quickest*”.
“... gas clouds or *nebula*”.
“... mainly the element *hydrogen*”.
“Red *giants* are stars...”.
“... have a mass *less* than our *Sun*”.
“Hydrogen is the *fuel* of all stars”.
“... combine producing *helium*, releasing lots of *energy* in the process”.
“... only form when a star explodes as a *supernova*”.
“*White* dwarfs are stars...”.
“The Sun was the *smaller* of the two stars...”
“... form a white dwarf or a *neutron* star”.
“... have found new *homes* around other stars”.

Explanation:
Filling in blanks is a series of reading the context around the blank and maybe a little research to double check. I picked these answers because they sounded right and fit the context and also did some research to double check some blanks (eg. Neutron). Sometimes, it’s even trial and error. Nevertheless, keep trying!

Answer:

(13) billions

Big bang

expanding

quickest

nebula

hydrogen

giants

less,sun

fuel

helium

energy

supernova

white

smaller

neutron

planets/homes

Is breaking a pretzel physical change or chemical change

Answers

It is a physical change because it is still the same thing (a pretzel) but just in two pieces. You’re not changing chemical composition.
Pyshical because it stays a pretzel it’s just now in smaller pieces rather than a large pretzel

What mass of K2SO4 What do you need to prepare 1200 g of an 8% K2SO4 m/m solution

Answers

Answer:

96 grams are required.

Explanation:

Given data:

Mass of K₂SO₄ required = ?

Mass of K₂SO₄ from = 1200 g of 8%

Solution:

Formula:

m/m% = mass required / mass given

Now we will put the values:

8%= x / 1200 g

8/100 = x / 1200 g

0.08 = x / 1200 g

0.08 × 1200 g= x

x = 96 g

So 96 gram of 1200 g is required.

Why do reactivity increases on moving from top to bottom in group 2 of modern periodic table?

Answers

Answer:

that's because....

group 1 (e.g Na, K) those tend to lose one electron to gain noble gas electron configuration.

they can achieve that by just losing one electron from their outer shell.

as you go down the group 1, element gets bigger in size, which means there is more space between nucleus (which is in center of atom) and electron of outer shell. the more far away they are the less attraction force between them.

so its easier for potassuim to lose one electron than for lithuim.

so that means potassium will easily give up 1 electron to react with non metal or other element therefore it is more reactive than lithuim

but in case of non metal, the opposite happens but simple to understand.

as you go down the group 7 (halogen- Cl, Br, I) element will get bigger therefore force between nucleus and outer electron is getting smaller. they have to gain 1 electron in order to fill the outer shell (to gain noble gas electron configuration.)

as florine is more smaller in size than clorine it is more reactive because florine has more tendency to pull extra electron from metal or other element towards its side. so it easily gain 1 electron to react.

2Al + 3H2SO4->Al2(SO4)3+H2
a) how many grams of aluminum sulfate would be formed if 250g h2SO4 completely reacted with aluminum ​

Answers

287.39 grams of Al2(SO4)3 is formed if 250g H2SO4 completely reacted with aluminum.

Explanation:

Balanced chemical equation:

2Al + 3H2SO4->Al2(SO4)3+H2

Data given:

atomic mass of Al2(SO4)3 = 342.14 gram/mole

mass of H2SO4 given = 250 gram

atomic mass of one mole of H2SO4 = 98.079 grams/mole

number of moles = [tex]\frac{mass}{atomic mass of one mole}[/tex]

number of moles = [tex]\frac{250}{98.079}[/tex]

number of moles = 2.54 moles

from the equation it can be seen as

3 moles of H2SO4 will react to give 1 mole Al2(SO4)3

2.54 moles of H2SO4 will react to give x moles of Al2(SO4)3.

[tex]\frac{1}{3}[/tex]= [tex]\frac{x}{2.54}[/tex]

x = 0.84 moles of Al2(SO4)3 is formed.

to calculate mass of the Al2(SO4)3 = Number of moles x atomic weight of one mole

= 0.84  x  342.14

= 287.39 grams of Al2(SO4)3 is formed.

2. When a teaspoonful of sugar is added to water in a beaker,
the sugar dissolves. The resulting mixture is
1) a compound
2) a solution
3) a suspension
4) an emulsion

Answers

Sugar + water = 2) a solution

The mixture is a solution

Its a solution because two substances mixed

determine the relationship between wavelength and frequency

Answers

Answer:

Explanation:

Wavelength and frequency are related by the velocity equation of waves.

  Velocity  = f x ∧

where f is the frequency

           ∧ is the wavelength

Frequency of a wave is the amount of that wave that passes through a point at a particular time.

Wavelength of a wave is the distance between two successive crests and trough.

Velocity of a wave is the speed of a wave

The sea water has 8.0x10^-1 cg of element strontium. Assuming that all strontium could be recovered, how many grams of strontium could be obtained from 9.84x10^8 cubic meter of seawater. Assuming the density of sea water is 1.0g/mL.

Answers

Answer:

       [tex]\large\boxed{\large\boxed{7.9\times 10^9g}}[/tex]

 

Explanation:

The information of the content of  the element strontium in seawater is incomplete. The complete information is:

The seawater has 8.0×10⁻¹cg of element strontium per kilogram of seawater.

Solution

1. First, convert the given volume of seawater given to kilograms

[tex]9.84\times 10^{8} m^3\times \dfrac{1,000dm^3}{m^3}\times \dfrac{1,000cm^3}{dm^3}\times 1.0\dfrac{g}{cm^3}\times\dfrac{1kg}{1,000g}=9.84\times 10^{11}kg[/tex]

2. Second, multiply the given concentration of the element strontium by the amount of seawater in kilograms

     [tex]8.0\times 10^-1cg/kg\times 9.84\times 10^{11}kg\times 1g/100cg=7.872\times 10^9g[/tex]

3. Finally, round to two significant figures:

     [tex]7.9\times 10^9g[/tex]

List one way you can conserve water

Answers

Don’t know what kind of answer you are looking for.

But I’d say one way for all of us is making a proper use of every drop. That would include turning off the faucet when you’re done washing your face, brushing, etc and taking shorter showers instead of just standing beneath it and stuff.


If you’re looking for a scientific kinda answer maybe afforestation can be one good way.


That’s just my opinion btw.

Answer:

Shorter showers

Explanation:

A 5 to 10 minute shower will only take about 10 or 20 gallons of water. Or you could take a bath and not fill the bathtub up very much.

It's completely up to you which one you chose to use. Many people take 30 to 60 minute showers. Based on that math, that could take up to 120 gallons of water.  

That shows that simply shortening your shower time, you will save gallons of water!

~CaityConcerto

What is the meaning of the word organism

Answers

Answer:

B) any complex thing with properties normally associated with living things

Answer:

Organism is a creature such as plant ,animals and living things or a single-celled life form

Explanation:

The living creature is compared with the interdependent part of the organism. Some of the Example for the organism is dog, bacteria or unicellular animal-like amoeba. This organism can be classified by naming and grouping. The biology name of an organism is called Taxonomy. Classification of an organism help in exploring the unknown potential of many helpful organisms.Due to their classification we can restore the ecosystem, which is imbalanced today.

How many molecules of the sweetener saccharin can be prepared from 30 C atoms, 25 H atoms, 12 O atoms, 8 S atoms, and 14 N atoms?

Answers

Final answer:

To determine the number of saccharin molecules in a given sample, you can use the molar mass and Avogadro's number. The molar mass of saccharin is 183.18 g/mol and Avogadro's number is approximately 6.022 x 10^23 molecules/mol. By plugging in these values and doing the appropriate calculations, you can find the desired quantities.

Explanation:

To determine the number of molecules of saccharin that can be prepared, we need to first calculate the molar mass of saccharin. The formula for saccharin is C7H5NO3S, which gives a molar mass of (7*12.01) + (5*1.008) + (1*14.01) + (3*16.00) + 32.06 = 183.18 g/mol.

With this information, we can calculate the number of saccharin molecules in a 0.0400 g sample by using Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol. So, (0.0400 g / 183.18 g/mol) * (6.022 x 10^23 molecules/mol) = X molecules of saccharin.

To find the number of carbon atoms in the same sample, we can again use the molar mass and Avogadro's number. (0.0400 g / 183.18 g/mol) * (6.022 x 10^23 molecules/mol) * 7 carbon atoms/molecule = Y carbon atoms.

1. Why is carbon dioxide a gas at low temperatures at mars
2. How does sodium chloride combine (share) electrons
3. Name the force of attraction between metal and non-metal
4. Explain ionic compound

Answers

1. carbon dioxide is a gas at low temperatures at mars because in the oxidizing environment organic compounds are oxidized to form carbon dioxide.

2. The 1 electron in outermost shell of Na is shared with 7 electrons of outermost shell of chlorine giving neutral charge on compound.

3. Electrostatic force of attraction is between the metal and non-metal.

4. When metal and non metal exchange electrons to form a neutral or no charge compound it is said to have form ionic bonds.

Explanation:

1. Temperature at Mars is very low -80 Fahrenheit  (-60 degrees) because water is not present in the planet. Carbon dioxide is abundant in Mars. The atmosphere is oxidizing at Mars which oxidizes the organic compounds and forms carbon dioxide.

2. NaCl combines by sharing of electrons forming ionic bonding. Different atoms of the different element share electrons to form ionic bonds. Such bond is formed when electrons is transferred between the atoms. In the NaCl, Na has 1 electron (electropositive) in its outer shell and chlorine has 7 electrons (electronegative). Both share the electrons getting their octet complete and a neutral charge on the compound formed.

3. Electrostatic force of attraction is between the metal and non-metal when bond is formed. The ionic bonds is formed between metal and non metals when electron exchange takes place. The electrostatic force is the attraction between two opposite charges on the ion.

4. When a metal and non metal exchange electrons in which metal is electropositive and non metal is electronegative the bonds form is called ionic bond. The electron is transferred from metal to non metal and thus giving neutral charge on the compound i.e. the outer shell has its octet complete.

When turbidity currents deposit graded beds of mud and sand on the ocean floor, what type of rock is formed?
A. Sedimentary
B. Metamorphic
C. Igneous basalt
D. Igneous granite

Answers

a. sedimentary
because the current will mold the mud and sand into rocks and currents forming rocks is a sedimentary rock formation
the is A. Sedimentary, someone else please explain why it is a.

Are C-12, C-13, and C-14 all carbon isotopes?

Answers

Answer:

Yes, they are isotopes.

Explanation:

Isotopes are atoms with the same atomic number Z and a different mass number (A). That is, they differ in the number of neutrons (eg carbon 12, has 6 protons, 6 electrons, and 6 neutrons, carbon 13, 7 neutrons, and carbon 14 8 neutrons).

Yes they all are carbon isotopes

Hydrogen gas reacts with oxygen to form liquid water. Write a balanced chemical equation for this reaction

Answers

Answer:

2H2 + O2 —> 2H2O

Explanation:

The equation for the reaction between H2 and O2 to produce liquid water is illustrated below:

H2 + O2 —> H2O

Next, we need to balance the equation. This can be achieved by doing the following:

There are 2 atoms of oxygen on the left side and 1 atom on the right side. It can be balanced by putting 2 in front of H2O as shown below:

H2 + O2 —> 2H2O

There are a total of 4 atoms of Hydrogen on the right side and 2 atoms on the left. It can be balanced by putting 2 in front of H2 as shown below:

2H2 + O2 —> 2H2O

Now we can see that the equation is balanced as we have the same number of atoms of Hydrogen and oxygen on both sides of the equation

Final answer:

The balanced chemical equation for the reaction of hydrogen gas with oxygen to form liquid water is: 2H2 + O2 = 2H2O. This equation respects the law of conservation of mass.

Explanation:

The reaction of hydrogen gas with oxygen to form liquid water is a chemical reaction that can be written as a balanced chemical equation. In this reaction, two molecules of hydrogen gas (H2) react with one molecule of oxygen gas (O2) to form two molecules of liquid water (H2O). So, the balanced chemical equation for this reaction is:

2H2 + O2 = 2H2O

This equation shows that for every two molecules of hydrogen gas and one molecule of oxygen gas, two molecules of water are produced. It is balanced because it obeys the law of conservation of mass, which states that the total mass of the reactants equals the total mass of the products in a chemical reaction.

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How much mercury and oxygen could be obtained from 21.7g of mercury (II) oxide

Answers

20.06 g of Hg  and 1.6 g of O₂

Explanation:

To Find:

Number of Mercury and oxygen that can be obtained from 21.7 g of HgO

First we have to write the balanced equation for the decomposition reaction of Mercury(II) oxide as,

2 HgO (s) → 2Hg(l) + O₂ (g)

21.7 g of HgO  = [tex]\frac{21.7 g}{216.59 g / mol}[/tex]  

                         = 0.1 mol of HgO.

As per the above equation, we can find the mole ratio between HgO and Hg is 1: 1 and that of HgO and oxygen is 2:1 .

So amount of Hg produced = 0.1 mol × 200.59 g / mol ( molar mass of Hg)

                                                 = 20.06 g of Hg

Amount of oxygen produced = 0.05  mol × 32 g/ mol = 1.6 g of O₂

Thus it is clear that 20.06 g of Hg  and 1.6 g of O₂  is obtained from 21.7 g of HgO

Final answer:

From 21.7g of mercury (II) oxide, approximately 20.059 g of mercury and 1.6 g of oxygen can be produced through the decomposition reaction. This calculation uses the stoichiometry of the reaction and the molar masses of the substances involved.

Explanation:

To determine how much mercury and oxygen could be obtained from 21.7g of mercury (II) oxide, we need to consider the decomposition reaction of mercury (II) oxide under standard state conditions:

2HgO(s, red) → 2Hg(l) + O2(g)

By using the molar mass of mercury (II) oxide (216.59 g/mol), we can convert the mass of mercury (II) oxide to moles:

21.7 g HgO × (1 mol HgO / 216.59 g HgO) = 0.1 mol HgO

Following the stoichiometry of the reaction, 0.1 moles of HgO will produce 0.1 moles of Hg and 0.05 moles of O2, since 2 moles of HgO decompose to produce 1 mole of O2. We can then calculate the mass of mercury and oxygen produced:

0.1 mol Hg x (200.59 g Hg/mol) = 20.059 g of Hg

0.05 mol O2 x (32 g O2/mol) = 1.6 g of O2

Therefore, 21.7g of mercury (II) oxide will produce approximately 20.059 g of mercury and 1.6 g of oxygen.

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