2. How much heat is required to raise the temperature of 250.0 g of H2O(l) from
10.8 °C to 31.1 °C?
523 kJ
O 274 kJ
21.3 kJ
43.8 kJ
Use the following information to answer the next two questions

In all living cells dna controls cellular activities by

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.

Each step in the following process has a yield of 70% ch4 + 4cl2 yield ccl4 +4hcl ccl4 + 2hf yield ccl2f2 + 2hcl of 4.50 mole ch4 reacts what is the total amount of hcl produced