Ms. block's students are studying chemical reactions. a classic reaction occurs when a metal is added to hydrochloric acid. miguel and kai added 30g of hydrochloric acid (hcl) to 30g of magnesium (mg) in a large test tube; bubbles appeared, the test tube felt warm, and they could no longer see the magnesium. they found that the mass of the products of the reaction was 52g. since the law of conservation of matter stated that matter cannot be created or destroyed, they was puzzled about the difference in mass. what is the best explanation for the missing 8g?

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.