Which of the following provides support and protection for many insects

a) muscle

b) skeleton

c) spinal cord

d) exoskeleton

Look up the density of n-butyl chloride (1-chlorobutane). Assume that this alkyl halide was prepared instead of the bromide.

Where are stars that are in their giant or super giant stages located on the Hertzsprung-Russell diagram? A) upper right B) lower left C) upper left D) middle

Name two geological resources

How many moles of sodium chloride are there in 250 ml of a 1.20 m solution of nacl? 1. none of these 2. 0.60 3. 1.2 4. 2.4 5. 0.30 6. 4.8?

Describe how cells are organized inside of the body.

An egg is fried is that a physical or a chemical change

How many mono-; di -; and trichloro derivatives are possible for cyclopentane?

A gas occupies 3.60 L when the temperature is 45.0oC and at 1.02 atm of pressure. What temperature change (in K) will be needed to change the volume to 6.25 L at constant pressure?

When did Pangaea begin to break apart? a. 20 million years ago c. 250 million years ago b. 100 million years ago d. 2 billion years ago.

When an object is thrown, the thrower pushes the object. This causes the object to move in a motion.