Calculate the density of sulfuric acid if 35.4 ml of the acid weighs 65.14

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Word equation for k+ h2o yield koh + h2

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?