1. Energy is required for chemical

reactions to take place. What form of

energy is used in cooking?

What is the name of the element with the atomic number 79

A chemist pumps hydrogen gas (h2) from a tank into a reaction vessel containing 0.734 mol o2. the gases react to form water. if all of the available o2 reacts, how many moles of h2 are used?

Why the is ratio of magnesium ions to chloride ions in MgCl2 is 1:2?

2. Calculate the mass of solvent in grams in a solution containing 3.0 grams of Tylenol if the mass percent is 3.5%.

A solution of hydrochloric acid contains Select one: a. fewer hydronium ions than chloride ions b. fewer hydroxide ions than hydronium ions c. more hydronium ions than chloride ions d. more hydroxide ions than hydronium ions

Consider a situation in which 211 g g of P4 P 4 are exposed to 240 g g of O2 O 2 . What is the maximum amount in moles of P2O5 P 2 O 5 that can theoretically be made from 211 g g of P4 P 4 and excess oxygen?

What is the total pressure when 0.400 g of H2, 2.00 g of N2, and 10.5 g of CO2 are injected into a 10.0 liter flask at 273 K?

The balanced chemical equation for the combustion of methane is: CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) Which of the following statements concerning this chemical equation is/are correct? 1.

In one kind of nuclear reaction, two nuclei fuse, or join together, to form a larger nucleus. This kind of reaction happens only at very high pressures. Explain why such high pressures are necessary to cause these reactions to occur.

Check the approach to obtain the correct conversion equation. Use the temperature in °F to find the temperature in °C. °C