Answers: 3
Chemistry, 22.06.2019 03:00
Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?
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 12:00
Why are people not able to skip a dive to the deepest part of the ocean
Answers: 1
Chemistry, 22.06.2019 12:30
Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17
Answers: 1
How many atoms in 22.9 mol Hg...
Mathematics, 22.05.2020 11:59
Chemistry, 22.05.2020 11:59
Mathematics, 22.05.2020 11:59
Physics, 22.05.2020 11:59
Mathematics, 22.05.2020 11:59
English, 22.05.2020 11:59
History, 22.05.2020 11:59
Chemistry, 22.05.2020 11:59
Chemistry, 22.05.2020 11:59