7. What is the volume of a penny if the mass is 0.2 g, and the density is 8.96 g/cm^3?

A. 2 cm^3

B. 0.22 cm^3

C. 20 cm^3

D. 1.8 cm^3

What is the Si (metric) for distance? A. meters B. inches C. feet D. kilometers

4 NH3 + 6 NO → 5 N2 + 6 H2O How many moles of NH3 are necessary to produce 0.824 mol N2?

O2 (g) → O2 (l) Predict whether the reaction above would have an increase or a decrease in entropy.

The force that moves sediment in a landslide or mudflow is _.

Record your findings about sound and light waves for each of the following. • Traveling through air • Traveling through metal • Why light travels faster

How does the electron-cloud model describe electrons? A. The exact position of an electron can be known. B. An electron can be found at certain distances from the nucleus. C. An electron has a high probability of being in certain regions. D.

Which of the following statement best describes the energy change that takes place during deposition? A) Heat energy is released by the substance. B) Heat energy is maintained by the substance. C) Heat energy is slowly gained by the substance.

2. 2AgNO3 + CaCl2 → 2AgCl + Ca (NO3) 2 How much AgCl could be obtained starting with 100g of each reactant.

Combining 0.301 mol Fe2O3 with excess carbon produced 11.6 g Fe. Fe2O3+3C⟶2Fe+3CO What is the actual yield of iron in moles?

What is the frequency of an electromagnetic wave with energy of 5.0 x 10-20 J?