Mg + 2HCI → MgCl2 + H2 How many grams of hydrochloric acid (HCI) is needed to produce 200g of H2?

As you watch a surfer ride a wave towards the shoreline, what is the shoreline? a) displacement reference b) reference point c) coordinate plane d) cartesian boundary

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma