Draw a Lewis structure of the molecule that matches the description below. All non-

H

atoms should have full octets, and all formal charges should be zero. Unless you're told otherwise, assume there are no rings in the molecule.

Description: The molecule is composed of

2

C

's,

5

H

's, and

1

N

and it contains a

C

-

C

double bond.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

Acrystal that absorvd water from air is (blank)a. aqueousb. homogenousc. hygroscopicd. efflorescent

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.