How many grams of NH3 are in 3.011x10^23 molecules of NH3

If a device uses 280 watts of power a day, about how many kilowatt-hours will it use in 30 days? A. 6.700 kilowatt-hours B. 200 kilowatt-hours C. 8.4 kilowatt-hours D. 6.7 kilowatt-hours

Aristotle, the ancient Greek philosopher, thought that heavy objects fall to Earth faster than lighter objects. How could Aristotle's hypothesis be supported or disproved?

Which statements describe the Mercalli scale? a. This scale measures seismic waves based on their size. b. This scale rates an earthquake according to how much damage it causes. c.

Three blocks of metal at the same temperature are placed on a hot stove. Their specific heat capacities are listed below. Rank them from greatest to least in how quickly each warms up.

Marcia pokes fun at her husband Brian because he loves to sing in the shower every morning, but his singing is terribly off-key. On the other hand, Brian teases Marcia for talking so loudly when she's on the telephone.

As light reflects off a mirror the angle between the incident ray and reflected ray of light is 50°. What is the angle of reflection?

In what part of the earth does convection occur?

13.00 cm + 2.56 mm + 0.0047 = cm? Solve problem with correct number of significant digits

What condition is necessary for the sustained flow of water in a pipe?

Are the days with the longest daylight always in the summer? Are the days with the shortest daylight always in the winter? Explain.