What is the 2nd most abundant element in the earths crust

Chemistry

1 answer:

Elza [17]3 years ago

3 0

Silicon is the second most abundant element in the Earth´s crust and makes up around 27% of it.

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4 examples of Substances that sublime?

AVprozaik [17]

1. Dry Ice (solid carbon dioxide)

2. Iodine

3. Arsenic

4. Naphthalene

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The most active of all the chemical elements is a halogen known as

rodikova [14]

Astatine. Because it has the smaller shell of electrons. I believe

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What is the name of the process during which a bond between two monomers is broken?

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Answer: D, hydrolysis

Hydrolysis is any chemical reaction in which a molecule of water ruptures one or more chemical bonds. The term is used broadly for substitution, elimination, and fragmentation reactions in which water is the nucleophile.

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What is the ionic charge for C, Si, Ge, Sn and Pb?

Alecsey [184]

An atom of carbon has 4 electrons in its outermost shell, which means that
its ionic charge is 4+ or 4-
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2 years ago

Vanyuwa [196]

Answer:

If the volume of a gas increased from 2 to 6 L while the temperature was held constant, the pressure of the gas decreased by a factor of 3.

Explanation:

Boyle's law that says "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure." This means that if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

P * V = k

To obtain the proportionality factor k you must make the quotient:

$k=\frac{V2}{V1} =\frac{6 L}{2 L}$

k= 3

This means that if the volume of a gas increased from 2 to 6 L while the temperature was held constant, the pressure of the gas decreased by a factor of 3.

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3 years ago