What is the number of molecules present in 2.50 mol H2S?

When a cup of hot chocolate cools from 90°C to 80°C, which of the following is happening to the molecules of the liquid?

when 2.40 moles of sodium react with 5.90 moles of chlorine gas in the reaction shown above, how many moles of sodium chloride are produced?

How to do compare and contrast energies

Consider the gas-phase reaction, 2 so2 + o2 2 so3, for which kp = 2 at a given temperature. If the mixture is analyzed and found to contain 2.2 bar of so2, 1.6 bar of o2 and 3.4 bar of so3, describe the situation:

A 1.00 liter container holds a mixture of 0.52 mg of He and 2.05 mg of Ne at 25oC. Determine the partial pressures of He and Ne in the flask. What is the total pressure?

O2 + CS2 → CO2 + SO2 Which of the following shows the equation balanced?

Convert 970. mm Hg to atm.

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy.

Is fire hot or cold?

In Flask A, you reacted 7.23 g Mg with 1.05 mol HCl. In Flask B, you reacted 1.22 g Mg with 1.35 mol HCl. Which balloon will inflate the most?