Planetesimals are made from

A. Rock

B. Gas

C. Stars

D. Clouds

What is the empirical formula of a compound that contains 50.0% carbon, 6.7% hydrogen, and 43.3% oxygen by mass? A. CH3O B. C3H5O2 C. C2H2O5 D. C3H205 E. C1H3O5

Which element contains the largest number of neutrons per atom? a. Copper - 64 b. Nickel - 59 c. Iron - 56 d. Manganese - 55

You have reacted calcium nitrate with sodium chloride, sodium phosphate, and sodium oxalate. of the three reactions which ones would form a precipitate?

Determine the dissociation constants for the following acids. Express the answers in proper scientific notation where appropriate a. acid a has a pka of 6.0 what is its ka? b. acid b has a pka of 8.60 whats its ka? c. acid c has a pka of - 2.

When 50.0 ml of a 0.3000 m agno3 solution is added to 50.0 ml of a solution of mgcl2, an agcl precipitate forms immediately. the precipitate is then filtered from the solution, dried, and weighed. if the recovered agcl is found to have a mass of 0.

The line of longitude used as the origin in a system of coordinates

In the ground state, has only 1 electron in a p orbital. A. carbon B. fluorine C. hydrogen D. nitrogen E. aluminum

Which of the following is a mixture? alcohol water mercury ink

A gas occupies 3.5 L at standard pressure. Find the volume of the gas when the pressure is 1.5 atm.

What is the temperature (in K) of 16.45 moles of methane gas in a 4.95 L container at 4.68 atm?