Chemistry, 17.05.2021 01:00 thevampsrock3
Perform the following operation and express the answer in scientific notation. 7.296x 10^2÷ 9.6x 10^-9
Answers: 1
Chemistry, 22.06.2019 04:30
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.
Answers: 1
Chemistry, 22.06.2019 11:40
Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)
Answers: 1
Chemistry, 22.06.2019 16:00
As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit
Answers: 2
Chemistry, 22.06.2019 16:10
Amixture initially contains a, b, and c in the following concentrations: [a] = 0.300 m , [b] = 1.05 m , and [c] = 0.550 m . the following reaction occurs and equilibrium is established: a+2b⇌c at equilibrium, [a] = 0.140 m and [c] = 0.710 m . calculate the value of the equilibrium constant, kc.
Answers: 1
Perform the following operation and express the answer in scientific notation. 7.296x 10^2÷ 9.6x 10^...
Mathematics, 15.12.2020 04:20
Mathematics, 15.12.2020 04:20
Mathematics, 15.12.2020 04:20
Social Studies, 15.12.2020 04:20
Chemistry, 15.12.2020 04:20
Mathematics, 15.12.2020 04:20
English, 15.12.2020 04:20
English, 15.12.2020 04:20
History, 15.12.2020 04:20
Arts, 15.12.2020 04:20
Mathematics, 15.12.2020 04:20
Chemistry, 15.12.2020 04:20
Mathematics, 15.12.2020 04:30