A balloon contains 2500. mL of Helium at 75.00°C. When the temperature is lowered to

-25.00 °C and the pressure remains unchanged, what is the new volume?

A certain amount of gas is trapped in a nonrigid container at atmospheric pressure. If the container is cooled and the gas in the container remains at atmospheric pressure, what will happen? O A. The number of moles of gas will decrease. OB.

The process by which solids vaporize without first becoming a liquid is called a. sublimation. b. boiling. c. condensation. d. evaporation.

Explain what happens to energy and matter during a chemical reaction.

A voltaic cell is set up and a chemical reaction proceeds spontaneously. Which of the following will not occur in this reaction? a. The electrons will migrate through the wire b. The cations in the salt bridge will migrate to the anode half-cell c.

How many grams of water will absorb a total of 2400 joules of energy when the temperature changes from 10.0°C to 30.0°C?

What is the molarity of a solution that contains 0.400 mol HCl in 9.79 l solution? A. 0.0133 M B. 0.0409 M C. 0.959 M D. 5.67 M

What is the voltage of a galvanic cell made with magnesium and gold

What are the two measurement systems the thermometer uses? Which one is most commonly used for science? Why?

Which term represents the sum of the atomic masses of the atom in a molecule?

How many hydrogen atoms are present in 0.70 moles of ptcl2 (nh3) 2?