Answer the two questions for 15pts

For 1: 6.68 g of nitrogen dioxide will contain number of molecules

For 2: The given amount of nitrogen dioxide molecules has a mass of 41.31 g.

Explanation:

According to the mole concept:

1 mole of a compound contains number of molecules

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

......(1)

We are given:

Mass of nitrogen dioxide = 6.68 g

Molar mass of nitrogen dioxide = 46 g/mol

Putting values in equation 1, we get:

Using above concept:

If 1 mole of a compound contains number of molecules

So, 0.145 moles of nitrogen dioxide will contain = number of molecules

Hence, 6.68 g of nitrogen dioxide will contain number of molecules

We are given:

Molecules of nitrogen dioxide = molecules

Using the above concept:

If number of molecules are present in 1 mole of a compound

So, number of molecules will be present in = moles of nitrogen dioxide

We know, molar mass of nitrogen dioxide = 46 g/mol

Using equation 1:

Hence, the given amount of nitrogen dioxide molecules has a mass of 41.31 g.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons