Why might hydrogen be a wonderful fuel for the future?

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.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?