1. what is the mass of 22.4 l of h2 at stp? a.) 1.01 grams b.) 2.02 grams c.) 11.2 grams d.) 22.4 grams 2. read the chemical equation. mg + hcl → mgcl2 + h2 how many liters of hydrogen gas is produced at 298 k and 0.960 atm if 3.00 moles of hydrochloric acid react with an excess of magnesium metal? a.) 38.2 liters b.) 42.6 liters c.) 66.7 liters d.) 76.4 liters

Explanation:

1.    According to Avogadro's law 1 mole of every gas occupies 22.4 L. Therefore, it is given that volume is 22.4 L so, this means that number of moles equal to one.

Molar mass of hydrogen gas is 2.02 g/mol.

Hence, calculate the mass as follows.

    No. of moles =

or,        mass =

                     =

                     = 2 g

Therefore, mass of 22.4 L of at STP is 2.02 grams.

2.   The given data is as follows.

         P = 0.960 atm,                T = 298 K

         n = 3.00 moles,               V = ?

         R = 0.0821 atm L/K mol

So, calculate the volume using ideal gas equation as follows.

                   PV = nRT

                     V =

                         =

                         = 76.455 L

Thus, we can conclude that volume of the hydrogen gas produced is 76.455 L.

sodium (na), for example, has one electron in its valence shell. this is an unstable state because that valence shell needs eight electrons to be full. in order to fill its valence shell, find a way to add seven electrons to its valence shell

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .