Question 7 11 The density of an unknown gas is 3.24 g/L at 28 degrees Celsius and 1.00 atm. Find the molar mass of the gas. Hint: (n = grams/grams per mole), (density = mass/volume) (Molar Mass = grams/mole) 0 45.5 g/mol 80.1 g/mol 7.45 g/mol 086.3 g/mol Question 8 1 pts

80.0 g/mol.

Explanation:

The volume of a mole of gas at 28 degrees C and 1 atm = 301/273 * 22.4

= 24.7 litres.

So the molar mass = 24.7 * 3.24

= 80.0 g/mol.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.