A shopping bag for feathers is a much lighter burden then shopping bag of nails?

The kinetic energy within molecules of an object when heat is added

A chemical reaction between iron atoms and oxygen molecules can only occur if (1) the particles are heated (2) the atmospheric pressure decreases (3) there is a catalyst present (4) there are effective collisions between the particles

A block of aluminum metal has a volume of 3.15 L and a mass of 8.51 kg. What is the density (g/mL) ?

A physical property of a solid used to describe its surface

Give two reasons why carbon is so interesting that it has a whole branch of chemistry set aside just to study carbon compounds.

A 150ml sample of hydrochloric acid completely reacted with 60.0mL of a 0.100 M NaOH solution. What was the original concentration of the HCl solution

Rearrange in to a quadratic 5.333 = (0.6 + 2p) ² / (0.135 - p)

How hot would a 2.3 L balloon have to get to expand to a volume of 3.0 L? Assume the initial temperature of the balloon is 24 °C, and that the pressure inside the balloon remains constant. A. 3 K B. 42 K C. 128 K D. 390 K

Which pair of nitrogen bases will form a bond in a DNA molecule? a. cytosine and adenine b. adenine and thymine c. guanine and thymine d. thymine and cytosine

Most meteors that fall into the earths atmosphere burn up before reaching the ground. Why is this?