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A) How many liters of H2 gas can be produced at 0 °C and 1.00 atm (STP) from 40.0 g of Zn?

Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)

B) A steel cylinder with a volume of 15.0 L is filled with 64.2 g of nitrogren gas at 25°C .

What is the pressure, in atmospheres, of the N2 gas in the cylinder?

C) A gas mixture containing oxygen, nitrogen, and neon exerts a total pressure of 1.16 atm .

If helium added to the mixture increases the pressure to 1.74 atm , what is the partial pressure (atm) of the helium?

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