Answer:
I think it's 1
Explanation:
As the balloon rises the gas inside the balloon expands because the pressure surounding the balloon drops.
Answer:

Explanation:
Hello,
In this case, by using the ideal gas equation, we first compute the moles of oxygen at the given volume, pressure and temperature:

Then, since molar mass of gaseous oxygen is 32 g/mol, we compute the contained mass in grams as shown below:

Best regards.
H2o only has two atoms in it.
(just trying to make this text longer,,,)
According to the Avogadro’s law I mole of any substance contains = 6.023 x 1023
Number of molecules in one mole= 6.023 x 1023
Therefore number of molecules in 6.7 moles of AlCl3:
6.023x1023 molecules /1.0 mole * 6.7 mole
= 40.3541 x 1023 molecules
= 4.03541 x 1024 molecules