Answer:

Explanation:
A pressure of 1 atm and a temperature of 0 °C is the old definition of STP. Under these conditions, 1 mol of a gas occupies 22.4 L.
1. Calculate the moles of hydrogen.

2. Calculate the number of molecules

Answer:
D
Explanation:
Scientists always perform tests and observe and measure in the physical world to prove their points or answer their questions.
I have provided the steps to figure out the number of atoms in the chemical compound.
Answer:
A: part 1 consumers, part 2 the sun
Atoms share electons to reach 8 valence electons. these are covalent bonds