Answers: 1
Chemistry, 21.06.2019 19:00
Y=‐1x + 7 if y has a value of ‐24 what is the value of x?
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, 23.06.2019 14:30
Hydrogen has three isotopes 1h, 2h, and 3h. what is the difference between these three isotopes?
Answers: 2
__ MgF2 + __ Li2CO3 + __ MgCO3 + -- LiF...
Social Studies, 13.05.2021 04:00
English, 13.05.2021 04:00
Mathematics, 13.05.2021 04:00
Mathematics, 13.05.2021 04:00
Mathematics, 13.05.2021 04:00
Spanish, 13.05.2021 04:00
Mathematics, 13.05.2021 04:00
Mathematics, 13.05.2021 04:00
Chemistry, 13.05.2021 04:00
Mathematics, 13.05.2021 04:00