Which of the following is a molecule but not a compound?

A He

B f2

C h2O

D CH4

3. The ideal gas law allows you to calculate which quantity that is not possible in Boyle's or Charles' law? a. volume b. pressure c. temperature d. number of moles

Which characteristic do cows and dogs share? hooves tails feathers beaks

Which planets' orbits is the belt located between the main asteroid belt?

Write balanced molecular and net ionic equations for the following reactions, and identify the gas formed in each: solid magnesium carbonate reacts with an aqueous solution of perchloric acid.

Gasoline has a density of 0.749 g/mL. How many pounds does 19.2 gallons of gasoline weigh? Use significant figures. Do not enter "pounds" as part of your answer.

Before the initial explosion was the matter hot or cold

Which of the following atoms has seven valence electrons? chlorine (Cl) nitrogen (N) manganese (Mn) oxygen (O)

A.) During an experiment, a student adds 2.90 g of CaO to 400.0 mL of 1.500 M HCl. The student observes a temperature increase of 6.00 °C. Assuming the solution/'s final volume is 400.0 mL, the density if 1.00 g/mL, and the heat capacity is 4.

Consider the ionic compound magnesium acetate. How many electrons does the magnesium ion have

What are two parts of the peripheral nervous system