What happens to the mass of a sample containing a radioactive element during its half-life?
a. the mass decreases by half. b. the amount of mass is doubled. c. eventually there is no mass at all. d. the mass remains the same.

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)

Which word refers to the smallest functional unit of living thing

The reaction of sodium hydrogen carbonate and acetic acid is described above. using the equation below, identify the proper coefficients for the balanced equation that upholds the law of conversation of mass