Answer:
Ionic compounds differ from ions in that the overall charge in ionic compounds equals zero while the overall charge in ions is less than or greater than zero. Ions have a superscript number followed by a either a positive or a negative sign. Where both signs appear in the same formula they make it an ionic compound.
what is the solution to the problem expressed to the correct number of significant firgures? 15.11+(142×16.5)
A 2,358
B 2,358.1
C 2,360
D 2,400
Answer:
B. 2358.1
Explanation:
142×16.5=2343
ans+15.11=2358.2
Answer: A. 2,358
Look at the image below.
This is a significant figures calculator.
what substance has a mass of 9.5g and volume of 2.1cm^3
Answer: i belive its 55
Explanation:tyy
Can someone plz help me with Visualize it! 5 plz I will mark them Brainliest
independent variable is temperature and dependent is the number of cold drinks sold. It's because the temperature is being changed without any outer influence while the number of cold drinks sold changes based on the weather. It's like cold drinks are going to sell better in the summer because it's hot vs in the winter because it's cold. The change in temperature isn't relying on anything but the drink is.
NO
Assign oxidation numbers to each element in this compound.
Answer:
N=+2
O=-2
Explanation:
The compound NO is electrically neutral.
Lets assign the oxidation number of nitrogen to be N. The oxidation number of oxygen (-2) is then used as a reference.
For the compound to have a zero charge, sum of the oxidation numbers equals zero.
N+ (-2)=0
N=+2
O=-2
a chemist determined by measurements that 0.0300 most of Beryllium oxide participate in a chemical reaction calculate the mass of Berlylium oxide that participates
Answer:
0.75g
Explanation:
From the given problem, the known parameters are:
Number of mole of BeO = 0.03mole
The unknown is the mass of BeO = ?
The formula of the compound is BeO
To solve this kind of problem, we use the mole relationship between number of mole and mass. This is expressed below mathematically:
Mass of BeO = number of moles of BeO x Molar mass of BeO
The molar mass of BeO:
Atomic mass of Be = 9g
Atomic mass of O = 16g
Molar mass of BeO = 9 + 16 = 25g/mol
Mass of BeO = 0.03 x 25 = 0.75g
The mass of BeO that participates is 0.75g
The mass of Beryllium oxide that participates in the chemical reaction is 0.7506 grams.
Explanation:To calculate the mass of Beryllium oxide that participates in the chemical reaction, we need to convert the given amount of moles to grams. The molar mass of Beryllium oxide (BeO) is 25.02 g/mol. Since we know that 0.0300 moles of BeO participate in the reaction, we can use the formula:
Mass = moles × molar mass
Mass = 0.0300 mol × 25.02 g/mol = 0.7506 g
Therefore, the mass of Beryllium oxide that participates in the chemical reaction is 0.7506 grams.
Given pH = 8.55 Find: [H3O+] and [OH-] Is this acidic, basic or neutral?
Answer:
[tex]\rm [H_3O^{+}] = 10^{-8.55}\;M\approx 2.82\times 10^{-9} \;M[/tex], and[tex]\rm [OH^{-}] = 10^{-5.45}\; M\approx 3.55\times 10^{-6}\;M[/tex]This solution is likely to be basic.
Assumption: this solution is under room temperature, where [tex]K_w = 10^{-14}[/tex].
Explanation:
The concentration of hydronium ions [tex]\mathrm{H_3O^{+}}[/tex] in the solution can be found from the [tex]\mathrm{pH}[/tex] value. This relationship does not depends on temperature.
[tex]\mathrm{[H_3O^{+}]} = 10^{-\mathrm{pH}} = 10^{-8.55}[/tex].
The question states that for this solution, [tex]\rm [H_3O^{+}] = 8.55\;M[/tex]. Apply the relationship between [tex]\mathrm{[H_3O^{+}]}[/tex], [tex]\mathrm{[OH^{-}]}[/tex], and [tex]K_w[/tex]. Note that the value of [tex]K_w[/tex] is dependent on the temperature of the solution.
[tex]\displaystyle \rm [OH^{-}] = \frac{\mathnormal{K_w}}{[H_3O^{+}]} = \frac{10^{-14}}{10^{-8.55}} = 10^{-5.45}\; M[/tex].
In other words,
[tex]\rm [H_3O^{+}] = 10^{-8.55}\;M\approx 2.82\times 10^{-9} \;M[/tex], and[tex]\rm [OH^{-}] = 10^{-5.45}\; M\approx 3.55\times 10^{-6}\;M[/tex] assuming that [tex]K_w = 10^{-14}[/tex].[tex]\rm [H_3O^{+}] < [OH^{-}][/tex].
In other words, this solution is basic.
What does the symbol "E3" represent?
A the energy required to remove the third valence electron
B the energy of electrons in the third energy level
C the energy required to remove an electron in the third energy level
D the energy required to remove three of the outermost electrons
Answer:
your answer to your question is B
I think answer of this question is D
Which statement is true according to the kinetic theory?
A.
Molecules of different gases with the same mass and temperature always have the same average density.
B.
Molecules of different gases with the same mass and temperature always have the same average volume.
C.
Molecules of different gases with the same mass and temperature always have the same pressure.
D.
Molecules of different gases with the same mass and temperature always have the same molecular mass.
E.
Molecules of different gases with the same mass and temperature always have the same average kinetic energy.
Answer:
I want to say B but I'm not sure
Answer:
The statement E is true on average kinetic energy; and mass and temperature. If gases from different types have same quantity of mass and same quantity of temperature then there will be same quantity in average kinetic energy.
Explanation:
The gaseous kinetic theory has the assumption that the size of molecules in any compound is very small compared to the distance between them. Also, the molecules are always in a vibration and it collides with boundary of cylinder and with each other.
In reference to the kinetic theory of gases, the different gases having different mass at same temperature always have the same quantity of average kinetic energy because the average kinetic energy of gases has directly proportional relation to the gaseous temperature.
The gas at higher temperature has higher kinetic energy amount and vice-versa.
How many miles of water are produced if 5.43 mol PBO2 are consumed
Answer:
Amount of oxygen = 2 * 5.43 moles
= 10.86 moles
Explanation:
Answer:Correct answer 10.9
Explanation:
Three alkali metals in group 1 are
A. calcium, strontium, barium
B. boron, aluminum, gallium
C. sodium, potassium,
rubidium
D. fluorine, iodine, chlorine
Answer:
C
Explanation:
same electron configuration
What causes different colors to appear in the sky?
the absorption of light by air molecules
the reflection of light by bodies of water
the greenhouse effect in Earth's atmosphere
the scattering and reflection of light by dust particles
Answer:
the scattering and reflection of light by dust particles
Answer:
the scattering and reflection of light by dust particles
Explanation:
The process of scattering is responsible for the different colors we see in the sky.
Different colors have have some different wavelengths, and hence, scatter accordingly.
The small dust particles that is present in the air , gets scattered as the light falls on the dust particles , and hence give various colors to the sky , since , blue is the color that is scattered the most , therefore , maximum sky is blue in color .
Similarly during night time , there is no light , hence , the sky appears dark.
stage in which a typical star has completely stopped fusion
Answer:
Red Giant
Explanation:
The stage in which a typical star has completely stopped fusion is called the Red Giant.
Please mark brainliest and have a great day!
Final answer:
A star stops fusion at the end of its lifecycle, becoming a white dwarf. Fusion of iron in the core requires energy, leading to the star's demise. Eventually, the white dwarf may explode as a type Ia supernova.
Explanation:
The stage in which a typical star has completely stopped nuclear fusion marks the end of its life cycle. After a star consumes all its hydrogen and goes through subsequent stages fusing heavier elements, it eventually reaches a point where further fusion is not energetically favorable. For example, the fusion of iron actually requires energy, signaling a catastrophic end for any star that reaches this stage.
A typical example of such an end state is when a star becomes a white dwarf. This occurs when all nuclear fusion has ceased within the star's interior, and it's stabilized by degeneracy pressure. The white dwarf represents the cooling cinder of a once vibrant star. Despite a brief resurgence of fusion in its outer layers that consume any remaining hydrogen, the star has effectively 'died' in terms of its stellar lifecycle. Over time, it may succumb to a violent end and be destroyed by a type Ia supernova, especially if it accumulates additional material from a companion star.
Science Help Needed NOW!!! Running Out of TIME!!!!
Will give BRAINLIEST
1.) The atomic emission spectrum of hydrogen includes four visible colors of light: red, blue-green, indigo, and violet. Which color of light corresponds with the largest electron transition?
A.) blue-green
B.) red
c.)indigo
d.) violet
2.) Hydrogen’s emission spectrum includes a line of violet light that has a frequency of
7.31∗1014 Hz. What is the energy (in joules) a photon of the violet light?
These are two questions and two answers
Question 1.) The atomic emission spectrum of hydrogen includes four visible colors of light: red, blue-green, indigo, and violet. Which color of light corresponds with the largest electron transition?
A.) blue-green
B.) red
c.) indigo
d.) violet
Answer:
violetExplanation:
The atomic emission spectrum is the set of coloer lines or frequencies of electromagnetic waves emitted by the atoms of an element due to the transition of the electrons from an upper energy level to a lower energy level.
The higher the jump of the electron during the transition, the higher the energy of th emssion and the higher the frequency of the electromagnetic wave emitted.
The color of light is related with the frequency of the electromagnetic wave.
The order of the frequencies for the visible light are:
red < orange < yellow < green < blue < indigo < violet.Then, violet is the visible light with the highest energy, whicn means that it corresponds to the largest electron transition.
Quesiton 2.) Hydrogen’s emission spectrum includes a line of violet light that has a frequency of 7.31∗10¹⁴ Hz. What is the energy (in joules) a photon of the violet light?
Answer:
4.84 × 10⁻¹⁹ JExplanation:
The energy of a photon of light is related with its frequency by the Planck - Einstein equation:
E = h×fWhere,
E is the energy of the photon,h is Planck's constant: 6.626 × 10⁻³⁴ J.sf is the frequency of the photon.Then, you can just substitute the frequency and the constant to obtain the energy:
E = 6.626 × 10⁻³⁴ J.s × 7.31 10¹⁴ Hz = 4.84 × 10⁻¹⁹ J ← answer(1) The color of light that corresponds with the largest electron transition is violet.
(2) The energy of the violet light with the given frequency is 4.84 x 10⁻¹⁹ J.
The increasing order of the frequencies of the visible light in electromagnetic spectrum include the following:
Red Orange ↓ Yellow Green Blue Indigo Violet.Thus, the color of light that corresponds with the largest electron transition is violet.
(2)
The energy of the violet light with the given frequency is calculated as follows;
E = hf
where;
h is Planck's constant = 6.626 x 10⁻³⁴ JsE = (6.626 x 10⁻³⁴) x (7.31 x 10¹⁴)
E = 4.84 x 10⁻¹⁹ J.
Learn more here:https://brainly.com/question/2256333
Cells produced at the end of telophase I have ____ as many _____ chromosomes as cells that started the process.
Answer:
The first blank is half
The second blank is replicated
Explanation:
Cells produced at the end of telophase I have half as many replicated chromosomes as cells that started the process.
Will vote brainliest!! Can someone please help me with the empirical formula of
C:46.66% H:4.48%
N:31.10% O:17.76%
I am getting 3C 4H 2N 1O but this is not one of the options so I don’t know if I’m doing it wrong or the question is wonky because I did all the others right
Answer:
It’s simple. You’re doing it right, the question is just messed up. If you think about it it’s like H2O
Explanation:
Answer:
The answer is C7H8N4O2.
Same problem as your other question - you rounded in a place where you shouldn't have (see explanation below, exact same process)!
Explanation:
These are percents by mass. Pretend you have a 100g sample. That means you have:
46.66g C
4.48g H
31.10g N
17.76g O
Divide each by molar mass to find the moles of each:
C: 46.66 / 12 = 3.89 mol
H: 4.48 / 1 = 4.48 mol
N: 31.10 / 14 = 2.22 mol
O: 17.76 / 16 = 1.11 mol
Now divide each of these values by the lowest of the three to find the ratio between each element in the compound:
C: 3.89 / 1.11 ≈ 3.5
H: 4.48 / 1.11 ≈ 4
N: 2.22 / 1.11 = 2
O: 1.11 / 1.11 = 1
As with your other question, 3.5 is too different from 3, so you can't round it down. The .5 makes it easy to find the LCD - it's 2. Multiply each of the numbers by 2 to get your final answer:
C: 3.5 x 2 = 7
H: 4 x 2 = 8
N: 2 x 2 = 4
O: 1 x 2 = 2
Again, if you were to take the percent masses of the empirical formula you came up with, you'll see they're quite different from the one the question provided, which is why you can't round in this situation.
A lab technician needs to create 570.0 milliliters of a 2.00 M solution of magnesium chloride (MgCl2). To make this solution, how many grams of magnesium chloride does the technician need?
Refer to the periodic table for help. Express your answer to three significant figures.
Answer:
108.3g
Explanation:
Given parameters:
Volume of solution = 570mm = 0.57L (1000mm = 1L)
Molarity of solution = 2M
Unknown
Mass of MgCl₂
Solution
We first find the number of moles in the given concentration of magnessium chloride using the expression below:
Number of moles of MgCl₂= Molarity x volume = 2 x 0.57 = 1.14moles
Using this known moles, we can the unknown mass of MgCl₂ the technician would require:
Mass of MgCl₂ required = number of moles of MgCl₂ x molar mass
Molar mass of MgCl₂:
Atomic mass of Cl = 35.5g
Atomic mass of Mg = 24g
MgCl₂ = 24 + (35.5x2) = 95gmol⁻¹
Mass of MgCl₂ required = 1.14mole x 95gmole⁻¹ = 108.3g
The required mass is 109 grams.
#platofam
when the mercury level in a barometer decreases that atmospheric pressure has
Answer:
increases
Explanation:
The barometer is a device that uses mercury in order to work and be able to measure the air pressure. The mercury reacts to the air pressure, so it either goes up or down. If the mercury goes down, that means that it is pressed more, thus the air pressure has increased, or rather is higher. If the mercury is lifting up, that means that there is less pressure from the air, thus the air pressure has declined, or rather is lower. It is a simple device that manages to do a very important job, and it is one of the most important devices used by the meteorologists for telling the current weather conditions, as well as predicting them for the next few days.
how many moles in 5 g of mg
Answer:
Explanation:
5 g Mg 1 mole Mg
* ___________ = 0.208333 moles Mg
24 grams Mg
24 is from the periodic table
Which diagram represents an object at static equilibrium?
A.
A
B.
B
C.
C
D.
D
Who knows the real answer to this??? Is it really D?
Answer:
the answer would be B.20n-->X<--20n
Explanation:
the amount of force is equal and balances out each other forming an equilibrium
What shape would a molecule with two bound groups and two lone pairs have?
Answer:
Bent.
Explanation:
A molecule with two bound groups and two lone pairs have a bent shape.
Hope this helps! Please mark brainliest!
Answer:
bent
Explanation:
The carbon bond strengths of graphite and diamonds are identical. True or False
Answer:
false :)
Explanation:
Hello There!
The carbon bond strengths of graphite and diamonds are not identical.
"FALSE STATEMENT"
What is a solute?
o the liquid in a solution
o the solid in a solution
the substance that dissolves
Answer:
The substance that dissolves
Explanation:
Solute is the substance that disappears into a liquid. For example,when salt dissolves in water,the salt is the solute because it is the substance that saluted.
Answer:
What is a solute?
The answer is C. The substance that gets dissolved.
What is a solvent?
The answer is C. The substance
that dissolves the solute.
Explanation:
Write a balanced nuclear reaction for the following:
216 Po → 0 β + ______
84 -1
When balancing the nuclear reaction, explain the following:
How does the Law of Conservation of Matter dictate what the daughter nuclide is?
How do we calculate the atomic mass and atomic number for the daughter nuclide?
Where do we look up what the new daughter nuclide element is?
Answer:
[tex]\rm ^{216}_{\phantom{2}84}Po \to ^{\phantom{-}0}_{-1}\beta + ^{216}_{\phantom{2}85}At[/tex].
Both mass number (A) and atomic number (Z) shall conserve. Hence the mass number of the daughter nuclide shall be 216 and its atomic number be 85.
Let the mass number of the daughter nuclide be [tex]A[/tex].
[tex]216 = 0 + A[/tex].
[tex]A = 216[/tex].
Let the atomic number of the daughter nuclide be [tex]Z[/tex].
[tex]84 = (-1) + Z[/tex].
[tex]Z = 85[/tex].
Look up the atomic number of the daughter nuclide in a modern periodic table. Alternatively, given that this reaction is a beta-minus decay, look for the element to the right of the parent nuclide.
Explanation:
Nuclides are made of neutrons and protons.
The atomic number (Z) is the number of protons in each of the nucleus. The mass number (A) is the number of protons plus neutrons in each of the nucleus.The mass number shall thus be greater than or equal to the atomic number of a nucleus. However, note that occasionally the atomic number of electrons (beta-minus particles) is written as -1. The atomic number of positrons (beta-plus particles, the antiparticle of electrons) is written as +1. Beta particles do not contain protons or neutrons and might not satisfy rule [tex]A \ge Z[/tex].
[tex]^{A}_{Z}\mathrm{X}[/tex].
By convention
The mass number of a nucleus is written at the upper-left corner of the atomic symbol. The atomic number of a nucleus is written at the lower-left corner of the atomic symbol.Both mass number and atomic number shall conserve in nuclear reactions. In other words, the sum of all mass numbers on the left-hand side of a nuclear equation shall be the same as the sum of all mass numbers on the right-hand side. So is the case with atomic numbers. For this nuclear equation,
Mass number on the left-hand side:
216 for [tex]^{216}_{\phantom{2}84}\mathrm{Po}[/tex].Mass numbers on the right-hand side:
0 for the beta-minus particle [tex]^{\phantom{-}0}_{-1}\beta^{-}[/tex], andLet [tex]A[/tex] be the mass number of the daughter nuclide [tex]^{A}_{Z}\mathrm{X}[/tex].Mass numbers conserve. Therefore,
[tex]216 = 0 + A[/tex].
[tex]A = 216[/tex].
Similarly,
Atomic number on the left-hand side:
[tex]84[/tex] for [tex]^{216}_{\phantom{2}84}\mathrm{Po}[/tex].Atomic numbers on the right-hand side:
"[tex]-1[/tex]" for the beta-minus particle [tex]^{\phantom{-}0}_{-1}\beta^{-}[/tex], andLet [tex]Z[/tex] be the atomic number of the daughter nuclide [tex]^{A}_{Z}\mathrm{X}[/tex].[tex]84 = (-1) + Z[/tex].
[tex]Z = 85[/tex].
Refer to a modern periodic table. What is the element with the atomic number [tex]Z = 85[/tex]? Astatine.
Alternatively, notice that the atomic number [tex]Z[/tex] has increased by [tex]1[/tex] relative to the parent nuclide [tex]\rm ^{216}_{\phantom{2}84}Po[/tex]. Elements on a modern periodic table are order in the increasing order of atomic numbers. As a result, the daughter nuclide shall be on the right of the parent element.
Complete the atomic symbol of the daughter nuclide:
[tex]\rm ^{216}_{\phantom{2}85}At[/tex].
Final answer:
The balanced nuclear equation for the decay of polonium-216 with an emission of a beta particle is: ^{216}Po_{84}
ightarrow 0_{-1}eta + ^{216}At_{85}. The daughter nuclide is astatine-216.
Explanation:
The student has asked to write a balanced nuclear reaction for the decay of polonium-216 (216Po) with an emission of a beta particle (0-1eta). The Law of Conservation of Matter dictates that the sum of the mass numbers (top numbers) and the atomic numbers (bottom numbers) must be the same on both sides of the reaction. This is a fundamental principle in balancing nuclear reactions, also known as nuclear accounting.
To find the daughter nuclide in the given decay reaction, we recognize that the emission of a beta particle (0-1eta) increases the atomic number by 1, but does not change the mass number. Thus, the daughter nuclide will have an atomic number of 85 and a mass number of 216. Since the periodic table is organized by atomic number, we can easily look up element 85 to find that it is astatine (At), making the daughter nuclide 216At.
The balanced nuclear equation is:
216Po84 ightarrow 0-1eta + 216At85
Do you guys know the answer
Answer:
NH₄NO₃.
Explanation:
NH₄NO₃ is a salt that has a pH < 7.It is formed from the reaction of strong acid (HNO₃) and weak base (NH₄OH).HNO₃ + NH₄OH → NH₄NO₃ + H₂O.
It is clear that it is an acidic salt.
So, its pH is < 7.
If an area has high air pressure and low humidity, what type of weather will it most likely have?
Plz help!!!
Areas with high air pressure and low humidity typically have fair and dry weather due to sinking air that discourages cloud formation and a lack of moisture that reduces precipitation likelihood.
Explanation:If an area has high air pressure and low humidity, it is likely to experience fair and dry weather. High air pressure usually involves sinking air, which inhibits cloud formation and leads to clearer skies. Low humidity means there is less moisture in the air, further reducing the likelihood of precipitation. Without the rising, condensing air masses characteristic of low-pressure systems, which produce clouds and precipitation, an area with high pressure and low humidity tends to have stable and pleasant weather.
Neils Bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from
Answer:
the 3rd option for make sense,so that's out
Dalton was the pioneer behind the atomic model,but he certainly didn't believe in the nucleus or electrons,much lest electron shells.
Chadwick's discovery was the discovery of the neutron,not electron energy levels.
Niels Bohr's model was an attempt at explaining the hydrogen atom's spectrogram,followed by Erwin Schrödinger.Thus the first option is the answer
Niels Bohr's model of the atom, which posits electrons in fixed energy levels, was supported by observations of the hydrogen atomic spectrum. This spectrum showed distinct lines corresponding to electron transitions, which corroborated Bohr's theory that electrons occupy specific allowed orbits.
Niels Bohr, a Danish physicist, introduced a groundbreaking model of the atom in 1913. Central to Bohr's model was the concept that electrons move in definite orbital paths around the nucleus with specific allowable energy levels, which he referred to as stationary states. This idea was demonstrated using the hydrogen atomic spectrum as evidence, where the emitted light could be seen as distinct lines, each corresponding to an electron moving between these fixed energy levels.
In Bohr's theory, each energy level is quantized, meaning electrons can only occupy certain regions of space at certain energy levels. The electron can jump from one energy level to another, but it does not emit or absorb energy while staying in a given energy level. The hydrogen atomic spectrum provides a visual representation of these jumps as unique spectral lines created when electrons move back to lower energy levels, releasing energy in the form of light.
Bohr's conclusions were primarily derived from observations of the hydrogen atomic spectrum. Hence, option A, Hydrogen atomic spectrum, is the strong support for Bohr's belief that electrons occupied different energy levels. His model successfully predicted the energy levels for hydrogen, earning him the Nobel Prize in Physics in 1922. However, this model could not fully explain the spectra of atoms with more than one electron.
What is generally true about the particles in a gas?
Explanation:
Every gas molecules are held by weak Vander waal forces because of which each molecule of a gas is free is move from one place to another.
This causes more number of collisions between molecules of a gas and gaps will also increase between each molecule.
As a result, gases are able to diffuse or spread at a faster rate.
Hence, generally it is true about the particles in a gas that gases diffuse at a faster rate.
Can someone please help me with the empirical formula of
C:63.15% H:5.30%
O:31.55%
I am getting 3C 3H 1O but that’s not one of the options on my sheet so I don’t know if I’m doing it wrong because all my other ones are done right
Answer:
C12H12NO3
Explanation:
Answer:
The answer is C8H8O3.
You rounded in a place where you shouldn't have (see explanation below)!
Explanation:
These are percents by mass. Pretend you have a 100g sample. That means you have:
63.15g C
5.30g H
31.55g O
Divide each by molar mass to find the moles of each:
C: 63.15 / 12 = 5.26 mol
H: 5.30 / 1 = 5.30 mol
O: 31.55 / 16 = 1.97 mol
Now divide each of these values by the lowest of the three to find the ratio between each element in the compound:
C: 5.26 / 1.97 ≈ 2.67
H: 5.30 / 1.97 ≈ 2.69
O: 1.97 / 1.97 = 1
These aren't whole numbers and you can't just round up. If the numbers you ended with were something around 2.98, I would be fine with rounding to 3. But here 2.67 is too different from 3 to the point where we're actually considering a completely different compound.
So, we need to multiply them all by some factor to get whole numbers that will make sense in a chemical formula. If you express 2.67 and 2.69 as fractions, you get about 8/3, and 1 can be represented as 3/3, so 3 is the LCD of all three numbers. Multiply each of the numbers by 3 to get your final answer:
C: 2.67 x 3 ≈ 8
H: 2.69 x 3 ≈ 8
O: 1 x 3 = 3
Side note: if you take the percent masses of the empirical formula you came up with, you'll see they're quite different from the one the question provided, which is why you can't round in this situation:
Finding mass using your empirical formula:
C: 3 x 12 = 36
H: 3 x 1 = 3
O: 1 x 16 = 16
Total mass = 36 + 3 + 16 = 55
% mass:
C: 36/55 = 65.45% (vs. 63.15%)
H: 3/55 = 5.45% (vs. 5.30%)
O: 16/55 = 29.09% (vs. 31.55%)
The values differ by more than 2% in some cases!
Which equation represents the total ionic equation for the reaction of HNO3 and NaOH?
• H + OH -> H2O
HNO3 + NaOH — NaNO3 + H20
H* + NO3 + Na+ + OH — Na + NO3 + H20
H* + NO3 + OH -—_NO3 + H20
The total number of dissociated ions in a chemical reaction is shown by the entire ionic equation. Ions that are visible on both sides of the reaction arrow are canceled out by the net ionic equation. The correct option is A.
A chemical equation known as an ionic equation expresses the electrolytes in aqueous solution as dissociated ions. The ionic species are usually followed by (aq) in the equation to denote that they are in an aqueous solution, and this is typically a salt that has been dissolved in water.
The molecular equation is:
HNO₃ + NaOH → NaNO₃ + H₂O.
And the ionic equation: H⁺ + OH⁻ → H₂O.
Na⁺ and NO₃⁻ ions are in an aqueous solution on both sides of the equation, so they are spectator ions. They are not part of the net ionic equation.
So, the net ionic equation is:
H⁺ + OH⁻ → H₂O.
Thus the correct option is A.
To know more about ionic equation, visit;
https://brainly.com/question/34147069
#SPJ6
The correct total ionic equation is: H⁺ + NO₃⁻ + Na⁺ + OH⁻ → Na⁺ + NO₃⁻ + H₂O which corresponds to option C.
When considering the reaction between HNO₃ and NaOH, we start by identifying the complete ionic equation. Since both HNO₃ and NaOH are strong electrolytes, they will dissociate completely in aqueous solution:
HNO₃(aq) dissociates into H⁺(aq) and NO₃⁻(aq)NaOH(aq) dissociates into Na⁺(aq) and OH⁻(aq)The total ionic equation for the reaction then becomes:
H⁺(aq) + NO₃⁻(aq) + Na⁺(aq) + OH⁻(aq) → Na⁺(aq) + NO₃⁻(aq) + H₂O(l)Here, Na⁺ and NO₃⁻ are spectator ions as they do not participate in the reaction. Thus, the net ionic equation, which shows only the species that undergo chemical change, is:
H⁺(aq) + OH⁻(aq) → H₂O(l)Therefore, the correct complete ionic equation for the reaction is:
H⁺ + NO₃⁻ + Na⁺ + OH⁻ → Na⁺ + NO₃⁻ + H₂OComplete Question: -
Which equation represents the total ionic equation for the reaction of HNO₃ and NaOH?
A. H⁺ + OH⁻ → H₂O
B. HNO₃ + NaOH → NaNO₃ + H₂O
C. H⁺ + NO₃⁻ + Na⁺ + OH → Na⁺ + NO₃⁻ + H₂O
D. H⁺ + NO₃⁻ + OH⁻ → NO₃⁻ + H₂O
20 POINTS!!! PLEASE HELP!!!! ASAP!!!!!1
A metal has higher reactivity than magnesium. Which of the following statements about the location of this metal on the periodic table can be true?
A. The metal is to the right of magnesium in the same row.
B. The metal is to the left of magnesium in the same row.
C. The metal is below magnesium in the same column.
D. The metal is above magnesium in the same column.
Answer:
The answer is B (sodium is more reactive)
Explanation:
The lesser reactive element to magnesium is present on the left side of the magnesium in the periodic table in the same row. Thus, option B is correct.
What is a periodic table?The periodic table is given as the arrangement of the elements in columns and rows based on the increasing order of the atomic number and the number of valence electrons.
In a periodic table, on moving from left to right reactivity increases, and from top to bottom reactivity decreases.
Thus, the element with the lesser reactivity than magnesium is present in the left of the magnesium in the same row. Thus, option B is correct.
Learn more about periodic table, here:
https://brainly.com/question/11155928
#SPJ2