16. calculate the amount of heat energy that is needed (7. calcula
to raise the temperature of 1000.0 g of sand from ll released
21.1 °c to 37.8 °c
temperat
q=m*c*a+
a = (1000.0 g)(0.670 j/g°c)(37.8 °c-21.1 °c)
a = 11189 j
q = 11200 j (sig figs)
18. if 11.500 t of energy is added to a 1000,0 9
19. if 11

Based on the equation and the information in the table, what is the enthalpy of the reaction?

What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.