Answers: 3
Chemistry, 21.06.2019 23:00
What is the molecular formula for a compound that is 46.16% carbon, 5.16% hydrogen, and 48.68% fluorine? the molar mass of the compound is 156.12 g/mol
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) β h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Β°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 15:20
Water is initially present in a state where its molecules are far apart. during a change of state, its molecules slow down. which change of state has most likely taken place? from a gas to a liquid from a liquid to a gas from a solid to a liquid from a gas to a plasma
Answers: 1
What is the mass of 2.9 moles of calcium? Explain please...
Mathematics, 12.05.2021 23:10
Social Studies, 12.05.2021 23:10
Mathematics, 12.05.2021 23:10
Mathematics, 12.05.2021 23:10
Mathematics, 12.05.2021 23:10
English, 12.05.2021 23:10
Mathematics, 12.05.2021 23:10
History, 12.05.2021 23:10
Mathematics, 12.05.2021 23:10
Mathematics, 12.05.2021 23:10