0.0840 dm3 of a gas is collected by water displacement at 22.00 C and 85.0 kPa. What volume would the dry gas occupy at standard pressure and 22.00 C? (water vapor pressure at 22.00 C = 2.6 kPa) I'm stuck on solving this one, plz show work! Will also mark you Brainliest!

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

What is the formula of the ionic compound composed of calcium cations and chloride anions

15) a substance used in manufacturing gasoline consists of finely divided platinum supported on an inert solid. suppose that the platinum is formed by the high temperature reaction between platinum (iv) oxide and hydrogen gas. the other product is water. a) write and balance the equation b) how many grams of hydrogen are needed to produce 1.0 g of platinum metal? c) how many moles of water are produced at the same time? how many grams? ( show work, .)