Answers: 1
Chemistry, 22.06.2019 06:40
Ted and emily played a mixed doubles tennis match against jack and brenda. in the second match. ted and brenda played against jack and emily. which type of chemical reaction does the situation demonstrate?
Answers: 3
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 12:50
What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate
Answers: 1
Chemistry, 22.06.2019 18:00
Which three statements represent the benefits of performing experiments using computer simulations?
Answers: 2
An unknown diatomic gas has a volume of 3.00 L at 1.00 atm and 45 C. how many moles would there be?...
English, 30.05.2021 14:50
Social Studies, 30.05.2021 14:50
Chemistry, 30.05.2021 15:00
History, 30.05.2021 15:00
Physics, 30.05.2021 15:00
English, 30.05.2021 15:00
Mathematics, 30.05.2021 15:00
English, 30.05.2021 15:00
Law, 30.05.2021 15:00
Mathematics, 30.05.2021 15:00
Physics, 30.05.2021 15:00