What mass of a metal #"M"# displaces 0.7 L of hydrogen at STP if the equivalent mass of the metal is 28 g?
The mass of the element is 1.7 g.
The equivalent mass of a metal
(one-half mole of
At STP, (0 °C and 1 bar) the molar volume of a gas is 22.7 L.
1 eq of anything reacts with 1 eq of anything else, so
Note: The answer should have only one significant figure, because that is all you gave for the volume of hydrogen.
However, I kept two significant figures.