Consider the reaction

B (s) + 32O2 (g) →B2O3 (s), ΔH = - 1270kJ

What will ΔH be for the reaction if it is reversed?

Express your answer with appropriate units.

What are some non-examples of subatomic particles

Approximately how much iron would be provided by a balanced diet supplying 2000 kcalories? choose one answer. a. 3 mg b. 6 mg c. 12 mg d. 30 mgthe answer is 12 mg iron would be provided by a balanced diet supplying 2000 kcalories.

Mechanical energy is a term that is used to describe A. potential energy only. B. neither potential nor kinetic energy. C. both potential and kinetic energy. D. kinetic energy only. Reset Submit

How many grams of ammonia (NH3) are produced when you react 4.76 grams of hydrogen (H2)

True or false Opaque materials always appear to be white.

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.

How does hess's law use intermediate reactions to calculate the enthalpy of a desired reaction?

Which atomic particle dtermines the chemical behaviour of an atom?

If you could travel to the Sun and back, about how far would you travel? A. 1 AU B. 2 AU C. 5 AU D. 10 AU

A scientist is conducting a descriptive experiment where she is monitoring sea level along coastal towns in California. What is a major benefit of this experiment? The relationship shows cause and effect. It is repeatable.