What is always true of a combustion reaction?

A) water will always be one of the products

B) the reaction releases a large amount of energy

C) one reactant must contain hydrogen

D) carbon dioxide is one of the reactants

Consider two electrochemical reactions: A and B. Reaction A results in the transfer of 2 mol of electrons per mole of reactant and generates a current of 5 Amps on an electrode 2 cm2 in area.

Which particle of the atom has no charge? a. neutron b. electron c. nucleus d. proton

Thermal energy is the energy associated with What?

Which of the following is a heterogeneous mixture? Air. Salt water. Steel. Soil.

True or False It is impossible for a virus to cause cancer.

Is a sample of liquid nitrogen more dense than a sample of nitrogen gas

You have a balloon containing 1 L of air at STP in a vacuum chamber. What will the volume of the balloon be when you reduce the pressure by half and increase the temperature to 373 K?

Which method will correctly determine whether the forces on an object are balanced or unbalanced? A. Multiply the forces in the horizontal direction by the forces in the vertical direction. B.

Carbon is found in all known forms of life. Which statement best describes why carbon is uniquely suited to forming macromolecules such as those found in living organisms? A. Carbon forms large compounds that are not chemically reactive. B.

Name a type of asteroid and give a description.