Answer:
I think it's the last one.
Explanation:
Because gravity is what makes our planets stay still and stops our planets from dropping and as they orbit around the sun that's what keeps the moon from bumping into earth. I hope this helps and makes sense.
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Answer:
to determine of it is a solid liquid or gas.
Explanation:
The melting point is the temperature at which a substance converts from a solid state to a liquid state.
Answer:
271.0 L
Explanation:
Given data:
Number of moles of hydrogen = 12.1 mol
Volume = ?
Solution:
The one mole of gas at standard temperature and pressure occupy the volume of 22.4 L.
One mole volume = 22.4 L
For 12.1 mol,
12.1 mol × 22.4 L / 1 mol
271.0 L
Now by putting the standard conditions we can calculate the number of moles and check the answer weather it is wrong or right.
Formula:
PV = nRT
R = general gas constant = 0.0821 atm.L/mol.K
standard temperature = 273.15 K
standard pressure = 1 atm
Now we will put the values in formula.
PV = nRT
n = 1 atm × 271.0 L / 0.0821 atm.L/mol.K × 273.15 K
n = 271.0 L .atm / 22.4 atm. L/mol
n = 12.1 mol
so answer is correct
Protons and neutrons have a strong nuclear force between them that binds them together in the nucleus
