Calculate the average atomic mass of carbon if 98.90% of the atoms are C-12 (12.000000 amu) and 1.100% are C-13 atoms (13.003354 amu). Give your answer to the correct number of significant figures.

Explain why warm air rises i need the answer by tomorrow

Consider the polymerization of styrene in toluene at 60°C initiated by di-t-butylperoxide for a solution containing 0.04 mol of initiator and 2 mol of monomer per liter. The initial rates of initiation, Ri, and propagation, RP, are found to be 1.

How does an enzyme affect a chemical reaction?

What do liver cells do?

In what year did french chemist antoine lavoisier group the known elements into categories he called metals, nonmetals, gases, and earths?

Consider the circuit 9.012 9.012 What is its equivalent resistance? Answer in units of 12.

out of 2.00 50 mL of water is added to 30 mL of a 0.50 M salt solution. What is the new concentration? (To write your answer using scientific notation use 1.0E-1 instead of 1.0 x 10-1)

If one object has more mass than another then it weighs more or less than the other object?

What is most believed by most scientists about the age of our solar system.

The water level in a graduated cylinder stands at 20.0 ml before and at 26.2 ml after a 16.74 g metal sample is lowered into the cylinder. what is the density of the sample. what metal is the sample most likely to be