How many grams of h2 gas can be produced by the reaction of 63.0 grams of al (s) with an excess of dilute hydrochloric acid in the reaction shown below? 2 al (s) + 6 hcl (aq) → 2 alcl3 (aq) + 3 h2 (g) ?

The volume of 400mL chlorine gas at 400mm Hg is decrease to 200mL at constant tempature. What is the new gas pressure?

Which statement correctly explains whether or not this equation is a balanced equation? Na2O H2O → 2NaOH A. The equation is balanced because it has equal amounts of atoms for each element in the reactants and products. B.

High-level radioactive waste requires deep burial because it is explosive. TRUE FALSE

Which of the following is true for balancing equations?

Which group tends not to form ions or react?

How many protons are in an element

Which of the following is an example of oxidation? A. Charcoal is placed on a grill and lighting fluid poured over it. B. A car gets rusty over the course of a few years. C.

The metric unit of force is the A. gram. B. kilogram. C. nanometer. D. newton.

Why can endothermic reactions be spontaneous? g?

What requirements must a molecule meet in order to be considered nonpolar?