Given the enthalpies of reaction below, determine the enthalpy change for the reaction: n2o (g) + no2 (g) 3no (g). n2 (g) + o2 (g) 2no (g) δh = +180.7 kj 2no (g) + o2 (g) 2no2 (g) δh = -113.1 kj 2n2o (g) 2n2 (g) + o2 (g) δh = -163.2 kj a. 155.6 kj b. 130.6 kj c. 311.3 kj d. 65.3 kj

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.