Which type of force results when an object touches another object?

Contact force

Gravitational force

Non-contact force

Magnetic force

What causes the air above a pot of boiling water to become warm? The air transfers thermal energy to the water vapor. The water vapor transfers thermal energy to the air. The particles in the air lose kinetic energy.

In an endothermic reaction would energy be considered a reactant or a product?

3. Gregory makes a sandwich using 20 grams of peanut butter, zo grams of jelly and sgrams of bread. What is the mass of the sandwich?

Which of the following collisions will lead to the reaction shown above AB + C ® BC + A A collides with B A collides with C B collides with C All of these will be effective collisions.

How many molecules of ascorbic acid (vitaminC, C6H8 O6) are in a 500 mg tablet?

Consider the reaction pathway graph below which indicates the energy that must be absorbed to initiate the reaction

Which statement best explains why a metal atom and a nonmetal atom are most likely to form an ionic bond? A.

What does a formation equation show

The equilibrium constant is given for one of the reactions below. Determine the value of the missing equilibrium constant. Deuterium, D, is an isotope of hydrogen. 2 HD (g) ⇌ H2 (g) + D2 (g) Kc = 0.

Which would not be classified as a pure substance?