What has the greatest mass?

a. a speck of dust

b. a boulder

c. a mountain

d. a pebble

What two things determine whether a molecule is polar? Check all that apply. A. The size of the atoms that make up the molecule B. Whether or not there are bonds of two atoms of unequal electronegativity C. Whether there is a double bond D.

What is the difference between xylem and phloem? A. Xylem carries water and nutrients up to the plants leaves while phloem carries food down form the plants leaves to its roots B Xylem carries water and nutrients up to the plants leaves while phloem

Compare two cells. One has a surface area to volume ratio of 3:1 and the other has a ratio of 6:1. Which one will have a better ability to get materials across its membrane?

A chemist decomposes several samples of carbon monoxide into carbon and oxygen and weighs the resultant elements.

A 12 foot ladder is leaning against a building. The ladder makes a 45 degree angle with the building. How far up the building does the ladder reach?

What type of calorimeter would be best to use if you wanted to measure the heat that is released when gasoline is burned?

Tina has a sample of gaseous water at a temperature of 400 C and a pressure of 4 atm. If Tina increases the pressure to 200 atm, will the gaseous water liquefy? Why or why not?

Label the molecular shape around each of the central atoms in the amino acid glycine. hint

Which has more atoms, 2moles of carbon or 2 moles of aluminum

At 100 degrees c, water reacts with acetic anhydride to make acetic acid. also, at 100 degrees c, water reacts with acetylsalicylic acid and reverts it to salicylic acid and acetic acid.