Based on the number of valence electrons, what is the correct formula when nitrogen bonds to hydrogen?

A) NH2

B) NH3

C) NH4

D) N2H

A glass rod, a piece of silk, and a piece of cat's fur are all initially uncharged. First, the silk and glass are rubbed together. Next, the glass and fur are rubbed together.

A car starts from rest and travels a distance of 150 m in 15 s with a constant acceleration what is the velocity of the car after 15 s?

Energy is measured in units called a. joules. b. pounds. c. meters. d. horsepower.

A fire engine must lift 30 kg of water a vertical distance of 20 m each second. What is the amount of power needed for the water pump for this fire hose?

Part C At what speed does the wreckage move if one car was driving north and one east? Express your answer to two significant figures and include the appropriate units. ! HA C ? Value Units Submit Request Answer Provide Feedback

What is the total number of atoms in the following formula? CaBr2 4 3 2 1

Object A with a mass of 500 kilograms hits stationary object B with a mass of 920 kilograms. If the collision is elastic, what happens after the collision? A) Both object A and object B move forward but with different velocities.

A young man walks daily through a gridded city section to visit his girlfriend, who lives m blocks East and nblocks North of where the young man resides.

Aliens from planet Moby have three alleles for skin color: R (red) W (white) and B (Blue). If all of these alleles are codominant and aliens on planet moby can only inherit two alleles for a gene, what are the six possible genotypes for skin color

The difference between two numbers is 15. When twice the smaller number is subtracted from three times the larger number, the difference is 58. What is the larger number?