CHEMISTRY HIGH SCHOOL

When heated, mercury oxide produces oxygen plus mercury. What would be the combined mass of oxygen and mercury if 20g of mercury oxide were heated?

Answers

Answer 1
Answer: Releasing the oxygen fromthe mercury does not change the mass. If you started with 20 g totalyou would still have 20 g total after the heating
Answer 2
Answer:

Final answer:

The combined mass of oxygen and mercury obtained from the thermal decomposition of 20g of mercury(II) oxide would also be 20g. The exact division between oxygen and mercury would depend on the stoichiometry of the reaction.

Explanation:

The subject here is the thermal decomposition of mercury(II) oxide (HgO). When this compound is heated, it decomposes into mercury and oxygen. The mass principle in chemistry, also known as the Conservation of Mass, states that the combined mass of the products (oxygen and mercury in this case) should be equal to the mass of the reactant (mercury oxide). Therefore, if you heat 20g of mercury(II) oxide, you would obtain a combined mass of 20g of oxygen and mercury. The exact mass of oxygen and mercury would depend on the atomic mass and stoichiometry of the decomposition reaction. For example, if the reaction were 2HgO --> 2Hg + O2, you would get twice as much mercury mass as oxygen, due to the nature of the balanced equation.

Learn more about Thermal Decomposition here:

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2.0 cm + 2.6 cm + 4.2 mm =

Please show work

Answers

Hi ;)!
So:
4.2 mm (/10) = 0.42 cm

2.0 cm + 2.6 cm + 0.42 cm =  5.02 cm ;)

What do the numbers listed for an element on the periodic table represent? The number with a higher value is the number of protons, and the number with a lower value is the number of neutrons.

The number with a higher value is the number of electrons, and the number with a lower value is the number of protons.

The number with a higher value is the mass, and the number with a lower value is the number of protons.

The number with a higher value is the number of protons, and the number with a lower value is the mass.

Answers

The answer is The number with a higher value is the mass, and the number with a lower value is the number of protons. 

The number with a higher value is the mass. This is because the mass number of the element is the sum of the number of protons and number of neutrons in the nucleus of the atom. On the other hand, the number with a lower value is the number of protons. The number of proton in the nucleus of the atom is the atomic number of the element. It involves only numbers of protons, thus, it has the lower value than the mass number.
For example, hydrogen has 1 proton and 1 neutron. Its atomic number is 1 (= number of protons). Its mass number is 2 (1 proton + 1 neutron = 2). Thus, mass number has higher value than the atomic number.

Which are functions of nucleic acids?Choose all answers that are correct.

A.
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B.
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C.
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D.
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Answers

i would go with b and c if you can choose both

Generally, which of the three families of elements (metals, nonmetals, or inert gases) has the least tendency to form ionic bonds?

Answers

Answer:

Inert gases

Explanation:

Inert elements have a stable electron configuration meaning their shells/orbitals are full with their requisite number of electrons. Therefore, gaining or losing an electron would take high ionization energy. Therefore they are less likely to be involved in chemical reaction unless a high amount of energy is used. An example of an inert gas is Helium.

Select all that apply. Which statements correspond to cellular respiration? O 2 is pumped in and forces CO 2 out. CO 2 diffuses passively out of the cell. CO 2 must be pumped out of the cell. CO 2 diffuses passively into the cell. O 2 diffuses passively when converted to CO 2. O 2 diffuses passively when produced inside the cell.

Answers

Answer:

The correct answer is CO2 diffuses passively out of the cell.

Explanation:

Carbon dioxide  is one of the end product of cellular metabolism.CO2 is produced as waste material inside the body after cellular respiration.

      Carbon dioxide is transported out from the body by passive diffusion process which helps the CO2 gas to move along the concentration gradient from high concentration region(body) to the low concentration region(atmosphere).

    Thus CO2 ia being eliminated from our body.
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