How many calories are required to raise the temperature of 75.0 g of water from 20 derees c to 50 degrees c? a. 3750 cal b. 1.50 × 103 cal c. 75.0 cal d. 2250 cal

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

Select the most likely product for this reaction: koh(aq) + co2(g) – ? k2co3(aq) + h2o(1) k(s) + h2(g) + o2(g) k(s) + co3(9) +h2

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride