Which of the following is not matter? a) Blood b) Humidity c) Electron d) Moon rock

Answer:

101,300 kPa.

Explanation:

It is known that:

760 mm Hg = 101,300 kPa.

760 mm Hg = 1.0 atm.

So, the right choice is: 101,300 kPa.

C) It goes up by one

Answer:

B) H2O

Explanation:

Compound is a pure substance composed of two or more different atoms chemically bonded to one another. Among all choices only H₂O is composed of two atoms, and other choices are composed of only one atom.  H₂O is the pure substance composed of chemically bonded two atoms (hydrogen atoms and oxygen atom).

Answer:

H₂O

Explanation:

Compound consists of combinations of elements. H (Hydrogen) is an element. O-16 and H-3 are stable isotopes of O (Oxygen) and H (Hydrogen), which are elements. H₂O is compound formed by two elements: Hydrogen and Oxygen.

Answer:

[tex]\boxed{2.8 \, \%}[/tex]

Explanation:

[tex]\text{Percent error} = \dfrac{\lvert \text{Measured - Actual}\lvert}{ \text{Actual}} \times100 \, \%[/tex]

Data:

Predicted = 17.4 cm

     Actual = 17.9 cm

Calculation:

[tex]\text{Percent error} = \dfrac{\lvert 17.4 - 17.9\lvert}{17.9} \times 100 \, \% \\\\= \dfrac{\lvert-0.5\lvert}{17.9} \times 100 \, \% = \dfrac{0.5}{17.9} \times 100 \, \% \\\\= 0.028 \times 100 \, \% = \textbf{2.8 \%}\\\\\text{The percent error in the measurement is } \boxed{\textbf{2.8 \%}}[/tex]

The mass of aluminum supplied to given quantity of heat in order to increase its temperature is 146.9 g.

The given parameters;

The mass of aluminum is calculated as follows;

Q = mcΔt

where;

[tex]m = \frac{Q}{c \Delta t} \\\\m = \frac{8750}{0.9025 \times 66} \\\\m = 146.9 \ g[/tex]

Thus, the mass of aluminum supplied to given quantity of heat in order to increase its temperature is 146.9 g.

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Answer:

The air pressure in the bottle will change.

Explanation:

According to Gay-Lussac's Law, one of the main gas laws, the pressure of gas is directly proportional to the temperature of the gas. This means that as the temperature of the gas increases, the pressure of the gas will increase as well. Therefore, if you heat a closed bottle, the air pressure inside the bottle will change (increase).

Answer:

They are all made of carbon

Explanation:

Diamond, graphite, and fullerenes are all made of carbon.

Hope this helps!

Diamond, graphite, and fullerenes "Are all made of carbon".

The crystal structure known as diamond cubic would be used to describe the solid form of something like the element carbon known as diamond.

Due to its resemblance to the appearance of a soccer ball, fullerenes with a spherical shape are frequently described as "buckyballs" or Buckminster fullerenes.

Therefore, the correct answer is an option (A)

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Are there any answer choices? If not, here are some possible responses you may see (that are correct, of course):

*It is used in the process of decomposition.

*It is used to release ammonia from dead animals that ultimately gets turned into nitrogen-based substances.

*It involves the formation of nitrates into nitrogen to complete the nitrogen cycle.

I hope I helped!

If you find the answer choices, just comment them down below and I will gladly tell you which one is correct. :)

Answer:

two oxygen atoms covalently bonded to a single carbon atom.

Explanation:

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Answer:

Carbon, and two Oxygen atoms

Explanation:

CO2, or Carbon Dioxide is made up of one Carbon (C) atom, and two Oxygen (O) atoms.

Answer:

a.

Explanation:

Answer:

True

Explanation:

Ice floats on water, for water is more dense than ice, allowing water to "support" the ice on top.

Iron nail, on the other hand, is more dense than water, allowing the nail to sink.

Answer: True an iron nail is more dense than the water and Ice the ice is less dense than the water making it float. Hopes this helps :)

Answer:  None of the given options .

Explanation:  The chemical formula of Iron (II) hydroxide can be written as

Fe (OH)2

As iron is present in its +2 state and hyrdoxide ion has charge of one negative unit .

Thus iron hydroxide can be written as the above and none of the given options is correct.

Answer: 32/16S which is sulfur

The isotopes that carry the exact same number of neutrons as they are in phosphorous-31 would be:

32/16S

Thus, 32/16S is the correct answer.

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Unlike clouds, fog, or mist which are simply suspended particles of liquid water in the air, water vapour itself cannot be seen because it is in gaseous form. Water vapour in the atmosphere is often below its boiling point. When water is boiled the water evaporates much faster and makes steam.

Both vapor and gas contains the gaseous molecules. But vapor state contains a second phase too along with gas whereas, gaseous state only contain one component.

Vapor is a state of matter consists of two component. Solid and gas  or liquid and gas. Thus vapor is formed when a gas comes in contact with liquid or solid.

There forms an equilibrium between gaseous state and liquid or solid state. For example water forms water vapor when the liquid water boils to form gases, similarly other liquids such as acids forms their vapor.

Gases such as oxygen, hydrogen, nitrogen etc.  forms only gases and thus have only one component. Thus we used to say nitrogen gas, hydrogen gas etc.

Therefore, vapor is a combination of two states and gas in a single state. Water forms vapor and can be called water vapor but nitrogen is called gas only.

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To calculate the heat absorbed by the water, we use the formula Q = mcΔT, where Q represents the heat energy absorbed, m is the mass, c is the specific heat capacity, and ΔT is the change in temperature. Substituting the given values, we find that approximately 136,872 joules of heat are absorbed to raise the water's temperature from 25°C to 100°C.

This question is asking how much heat energy, in joules, is required to heat 435 grams of water from 25°C to 100°C at atmospheric pressure. The formula used to calculate this is Q = mcΔT, where Q represents the heat energy absorbed, m is the mass of the substance (water), c is the specific heat capacity, and ΔT is the change in temperature.

For water, the specific heat capacity (c) is 4.184 J/g°C. The mass (m) of the water is given as 435 g. The change in temperature (ΔT) is the final temperature minus the initial temperature, which is 100°C - 25°C = 75°C.

Substituting these values into the equation gives us, Q = (435 g) × (4.184 J/g°C) × (75°C), which equals approximately 136,872 joules. This is amount of heat absorbed by the water to raise its temperature from 25°C to 100°C at 1 atm.

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Answer:

[tex]\boxed{3.966 \times 10^{24}\text{ atoms of Ag}}[/tex]

Explanation:

(a) Balanced equation

Cu + 2AgNO₃ ⟶ Cu(NO₃)₂+ 2Ag

(b) Calculation

You want to convert atoms of Cu to atoms of Ag.

The atomic ratio is ratio is 2 atoms Ag:1 atom Cu

[tex]\text{Atoms of Ag} = 19.83 \times 10^{23}\text{atoms Cu} \times \dfrac{\text{2 atoms Ag}}{\text{1 atom Cu}}\\\\= 3.966 \times 10^{24}\text{ atoms of Ag}\\\\\text{The reaction will produce }\boxed{\mathbf{3.966 \times 10^{24}}\textbf{ atoms of Ag}}[/tex]

Answer:

[tex]3.966\times 10^{24} [/tex] pure silver atoms are produced.

Explanation:

[tex]1 mol = N_A=6.022\times 10^{23} mol^{-1}[/tex]

Atoms of copper = [tex]19.83\times 10^{23} [/tex]

Moles of copper = [tex]\frac{19.83\times 10^{23} }{N_A}[/tex]

[tex]=\frac{19.83\times 10^{23} }{6.022\times 10^{23} mol^{-1}}=3.293 mol[/tex]

[tex]Cu + 2AgNO_3\rightarrow Cu(NO_3)_2 + 2Ag[/tex]

According to reaction, 1 mol of copper atoms gives 2 moles of silver atoms.

Then 3.293 moles of moles of copper will give:

[tex]\frac{2}{1}\times 3.293 mol=6.586 mol[/tex]

Number of silver atoms in 6.586 moles of silver:

=[tex]6.586 mol\times 6.022\times 10^{23} mol^{-1}=3.966\times 10^{24} atoms [/tex]

Answer:

Volume  only intrinsic

Explanation:

Answer:

The balance between intermolecular forces and kinetic energy

Explanation:

If the kinetic energies of the particles are not strong enough to overcome the intermolecular forces, the particles will be locked in place in a crystal lattice. The substance will be a solid.

If the kinetic energies of the particles are slightly stronger than the intermolecular forces, the particles will be able to slide past each other. The substance will be a liquid.

If the kinetic energies of the particles are much stronger than the intermolecular forces, the particles will be escape completely from the attractions of their neighbours. The substance will be a gas.

The balance between intermolecular forces and kinetic energy. thus option D is correct.

Kinetic energy, form of energy that an object or a particle has by reason of its motion.

If the kinetic energies of the particles are not strong enough to overcome the intermolecular forces, the particles will be locked in place in a crystal lattice. The substance will be a solid.

If the kinetic energies of the particles are slightly stronger than the intermolecular forces, the particles will be able to slide past each other. The substance will be a liquid.

If the kinetic energies of the particles are much stronger than the intermolecular forces, the particles will be escape completely from the attractions of their neighbours. The substance will be a gas.

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Answer:

iron n chlorine

Explanation:

Answer:

The compound FeCl3 is made of IRON AND AND CHLORINE

Zn₃(PO₄)₂ is the chemical formula for zinc phosphate.

The chemical formula of a compound means the symbolic representation of the composition of a compound.

Zn₃(PO₄)₂ is the chemical formula for zinc phosphate.

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Answer:

d. synthesis

Explanation:

it uses the formula a+b=ab.

Answer:

synthesis

Explanation:

A + B → AB

A simple example of a synthesis reaction is the formation of water from its elements, hydrogen, and oxygen:

2 H2(g) + O2(g) → 2 H2O(g)

Answer:

2H3PO4 + 3Ca(OH)2 = Ca3(PO4)2 + 6H2O

3CaO + P2O5 = Ca3(PO4)2

Explanation:

1) When phosphoric acid reacts with calcium hydroxide neutralization reaction takes place in which calcium phosphate is formed along with formation of water.

The balanced chemical equation is give as:

[tex]2H_3PO_4+3Ca(OH)_2\rightarrow Ca_3(PO_4)_2+6H_2O[/tex]

2) When calcium oxide acid reacts with phosphorus pentoxide addition reaction takes place in which calcium phosphate is formed.

The balanced chemical equation is give as:

[tex]3CaO+P_2O_5\rightarrow Ca_3(PO_4)_2[/tex]

Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells. They are vital for life and serve a wide range of important functions in the body, such as aiding in digestion and metabolism.

Enzymes lower the activation energy level of a chemical reaction, thus making it so the reaction will proceed.

Enzymes are proteins that help speed up chemical reactions in our bodies.

Enzymes are proteins that speed up the rate of a chemical reaction without being used up during the reaction.

They are biological catalysts. Catalysts, as we know lower the activation energy for reactions and speed them up.

The lower the activation energy for a reaction, the faster the rate.

Thus enzymes speed up reactions by lowering the activation energy.

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Answer:

= 51.57 °C

Explanation:

The combined gas equation shows that P₁V₁/T₁=P₂V₂/T₂ where P represents pressure, V represents volume and T absolute temperature

From the information provided in the question,

Since we are finding the initial or original temperature, we can make T₁ the subject of the formula.

T₁=P₁V₁T₂/P₂V₂

P₁=2.0 ATM

P₂= 1.0 ATM

V₁=2.0 L

V₂= 3.5 L

T₁=?

T₂= (11+273) K=284 K

Using these values in the formula:

T₁= (2.0 ATM × 2.0 L× 284 K)/(1.0 ATM × 3.5 L)

=324.57 K

324.57-273= 51.57 °C

Answer:

20.9 kJ.

Explanation:

Q = m.c.ΔT,

where, Q is the amount of heat released to water (Q = ??? J).

m is the mass of water (m = 100.0 g).

c is the specific heat capacity of solution (c = 4.18 J/g.°C).

ΔT is the difference in T (ΔT = final temperature - initial temperature = 75.0°C - 25.0°C = 50.0°C).

∴ Q = m.c.ΔT = (100.0 g)(4.18 J/g.°C)(50.0°C) = 20900 J = 20.9 kJ.

Answer:the empirical formula is C3H8O2

Explanation:

You need to determine the relative number of moles of hydrogen and carbon. So you first calculate the molar mass of CO2 and H20 Atomic weight of carbon = 12.0107 Atomic weight of hydrogen = 1.00794 Atomic weight of oxygen = 15.999 Molar mass CO2 = 12.0107 + 2 * 15.999 = 44.0087 Molar mass H2O = 2 * 1.00794 + 15.999 = 18.01488 Now calculate the number of moles of CO2 and H2O you have Moles CO2 = 2.086 g / 44.0087 g/mole = 0.0474 mole Moles H2O = 1.134 g / 18.01488 g/mole = 0.062948 mole Calculate the number of moles of carbon and hydrogen you have. Since there's 1 carbon atom per CO2 molecule, the number of moles of carbon is the same as the number of moles of CO2. But since there's 2 hydrogen atoms per molecule of H2O, The number of moles of hydrogen is double the number of moles of H2O Moles Carbon = 0.0474 Moles Hydrogen = 0.062948 * 2 = 0.125896 Now we need to determine how much oxygen is in the compound. Just take the mass of the compound and subtract the mass of carbon and hydrogen. What's left will be the mass of oxygen. Then divide that mass by the atomic weight of oxygen to get the number of moles of oxygen we have. 1.200 - 0.0474 * 12.0107 - 0.125896 * 1.00794 = 0.503797 Moles oxygen = 0.503797 / 15.999 = 0.031489 So now we have a ratio of carbon:hydrogen:oxygen of 0.0474 : 0.125896 : 0.031489 We need to find a ratio of small integers that's close to that ratio. Start by dividing everything by 0.031489 (selected because it's the smallest value) getting 1.505288 : 3.998095 : 1 The 1 for oxygen and the 3.998095 for hydrogen look close enough. But the 1.505288 for carbon doesn't work. But it looks like if we double all the numbers, we'll get something close to an integer for everything. So do so. 3.010575 : 7.996189 : 2 Now this looks good. Rounding everything to an integer gives us 3 : 8 : 2 So the empirical formula is C3H8O2

Answer:

²³⁵₉₂U

Explanation:

Properly writing the equation we have:

       ²³⁹₉₄Pu → ᵃₙX + ⁴₂He

The unknown atom here is X with mass number "a'' and atomic number ''n''

In balancing chemical equations, the mass number and atomic number must be conserved. This implies that the sum of atomic numbers i.e subscript on the left hand side must be equal to that on the right hand side. Also, the sum of the mass numbers i.e superscript on the left hand side must be equal to that on the right hand side.

For the mass numbers:

       239 = a + 4

      a = 239 - 4 = 235

For atomic numbers:

     94 = n + 2

      n = 94 -2 = 92

The atom X, has a mass number of 235 and an atomic number of 92.

This is can be written as ²³⁵₉₂X

This is option 3

Answer:

Some scientists hypothesize that Earth's ozone layer is being damaged by chlorofluorocarbons .

Explanation:

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Answer:

chlorofluorocarbons

Answer:

Because No New Substance if Formed!

Explanation:

When ice melts, it is still considered to be water, it's just no longer a solid. The molecules of water do not become something else and simply just change phases. A chemical reaction requires that a new substance be formed, for example when you burn paper, a new substance is formed. Also melting ice is reversible, you can just freeze it again, while chemical reactions cannot be reversed!

Answer:

[tex]\boxed{\text{SnBr}_{4}}[/tex]

Explanation:

The name tells you that this is a binary compound (contains two elements).

It contains a metal and a nonmetal, so it is a binary ionic compound. The general rule is:

Name of compound = name of metal  name of ion (two words)

Name of metal = tin(IV), so the tin ion has a charge of 4+

Name of ion = bromide. Br is in Group 17, so bromide ion has charge of 1-.

[tex]\rm Sn$^{4+}$ + 4Br$^{-} \longrightarrow \,$ SnBr$_{4}$\\\\\text{The formula is} \boxed{\textbf{SnBr}_{4}}[/tex]