The total amount of energy before and after a chemical reaction is the same. Thus, energy is A. conserved. B. created. C. destroyed. D. the same as mass.

How do scientists use radioactivity to determine the age of a rock?

For the following hypothetical reaction: 3A+12B-->4C, How many moles of B will you need to convert 5 moles of A into as many moles of C as possible? (Enter just the number; not the number and units)

The Symbol For Gold Is Taken From It's Latin Name "aurum" Which Is The Symbol For Gold? A. Go B. Au C. Al D. Gd

Which term is dependent on temperature? A. [A] B. [B] C. R D. x + y E. None of the Above Which term is dependent on pressure? A. [A] B. k C. R D. x + y E. None of the Above

Can matter every be destroyed? Why or why not?

How many electrons does zinc lend?

Solid iron has a density of 7.9 g/cm3. Liquid mercury has a density of 13.6 g/cm3. will iron float or sink in mercury explain

Convert 6.42 moles of H2O to molecules

An aspirin tablet contains 81.0 mg of aspirin, which has the molecular formula, c9h8o4.

What size container do you need to hold 0.0459 mol of N2 gas at stp