Idon't unerstand what i'm supposed to do for these

heat = mass * c * temp change
175g 0.79j/gc 75 c

heat = mass * c * temp change
352g 1.65j/gc 25 c

heat = mass * c * temp change
268g 4.18j/gc 40 c

heat = mass * c * temp change
74g 0.21j/gc 67 c

these are the answers i'm supposed to match with each one
1.04kj
10.4kj
14.5kj
44.8kj

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]

Scientists have developed an explanation of a phenomenon from several verified hypotheses. the explanation has been confirmed through numerous experimental tests.which option best describes this explanation? a. scientific lawb. research questionc. hypothesisd. scientific theory

The molecular weight of carbon dioxide, co2, is 44.00 amu, and the molecular weight of nitrous dioxide, no2, is 46.01 amu, so no2 diffuses co2