Chemistry, 08.12.2020 02:20 vleverett444
If you pluck a guitar string hard the sound waves it gives off will have amplitudes.
Answers: 2
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 14:50
Which of the following is most likely true about water in chemical systems? a) water dissolves nonpolar ionic compounds. b) water dissociates ionic compounds. c) water dissociates covalent molecules. d) water dissolves nonpolar covalent substances.
Answers: 1
Chemistry, 22.06.2019 20:00
State one important difference between a physical change and a chemical change?
Answers: 1
If you pluck a guitar string hard the sound waves it gives off will have amplitudes....
English, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Health, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Social Studies, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Biology, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Mathematics, 16.12.2020 18:30
Chemistry, 16.12.2020 18:30