For the balanced equation shown below, if the reaction of 0.112 grams of

H2 produces 0.745 grams of H20, what is the percent yield? Fe3O4 + 4H2 -> 3Fe

+ 4H2O

74.5%

84.5%

94.5%

092.2%

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

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.

Based on its chemical properties, identify the position of each chemical family on the periodic table.