Answers: 3
Chemistry, 22.06.2019 06:00
Why is permeable soil best for plants that need a lot of drainage?
Answers: 1
Chemistry, 22.06.2019 07:00
What is the main purpose of patent attorneys? defend the company against legal claims manage financial investments invent new products protect rights to new products and processes
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 12:30
Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?
Answers: 3
Who wants to play fortnite with me rightnow...
History, 28.01.2020 01:31
Mathematics, 28.01.2020 01:31
Mathematics, 28.01.2020 01:31
Social Studies, 28.01.2020 01:31
History, 28.01.2020 01:31
Mathematics, 28.01.2020 01:31
Mathematics, 28.01.2020 01:31
Chemistry, 28.01.2020 01:31
Mathematics, 28.01.2020 01:31
Mathematics, 28.01.2020 01:31
Mathematics, 28.01.2020 01:31