Which is the correct Lewis dot structure of NH2?

H-N-H

H-N-H

A.

B.

N-H-H

H-N-H

c.

D.

•H-N-H.

=.

ОА. А

OB. B

Ос. с

OD

D

OE. E

Joseph has hypothesized that sound travels in waves. If he were following the scientific method, what should he do next? A. Ask a question. B. Test the hypothesis. C. Study the results. D. Tell other scientists about his hypothesis.

How do you convert 53.5 kg to g

Which of the following is storing gravitational potential energy? A. A cat stalking a mouse B. A baseball player sliding into home plate C. A ballet dancer spinning on her toes D. A water bucket hanging over a well

A student performs the following procedure: Procedure 1. Measure 25 grams of an unknown solid. 2. Measure 200 grams of water. 3. Pour the unknown solid and water into beaker, which weighs 50 grams. 4. Stir the solution.

Why shouldn't bias be part of the scientific inquiry

A group of organisms that breed and produce offspring that can breed. A. Species B. ecosystem C. Biodiversity

What is the molality of a solution containing 100 grams of glucose (C6H12O6, molar mass = 180 g/mol) dissolved in 2.5 kg of water? 0.22 m 72 m 7200 m 40 m

A battery is constructed based on the oxidation of magnesium and the reduction of cu2+. the initial concentrations of mg2 + and cu2 + are 1.2*10-4 m and 1.44 m, respectively, in 1.0-liter half-cells. how long can the battery deliver 5.

A buffer solution is made that is 0.417 M in and 0.417 M in. If for is, what is the pH of the buffer solution? pH = Write the net ionic equation for the reaction that occurs when 0.120 mol is added to 1.00 L of the buffer solution.

BaCl2 (aq) + AgNO3 (aq) → Express your answer as a chemical equation. Enter noreaction if no precipitate is formed.