Answer:

Explanation:
Assuming that all caculations are at normal pressure and -1.72°C :

Where
is the number of moles of hydrogen
is the mass of hydrogen
is the density of hydrogen
There can only be two electrons in the innermost shell of an atom so b is the correct answer
Answer:
The nucleus of atom is composed of two subatomic particles that each have charges.
- Protons, which are positively charged particles.
- Neutrons, which are neutrally charged particles.
Both reside in the nucleus of an atom. The amount of protons and neutrons (Electrons can to) is what helps us identify each atom apart. Electrons are NOT in the nucleus of atom but orbit it in outer layers called orbitals.
The answer would be Gravity.
The answer is a) by increasing the temperature of the reactants.