Chemistry, 19.03.2020 02:06 TheMixingToad
Briefly explain how you would perform a 1:5 dilution of a beverage sample if you had 10-ml graduated pipet available. A 10-ml graduated pipet is marked to the nearest 0.1 ml.
Answers: 1
Chemistry, 22.06.2019 09:20
What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?
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 16:50
Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.
Answers: 1
Chemistry, 22.06.2019 23:30
Match each statement with the state of matter it describes
Answers: 3
Briefly explain how you would perform a 1:5 dilution of a beverage sample if you had 10-ml graduated...
Computers and Technology, 03.11.2020 18:20
History, 03.11.2020 18:20
History, 03.11.2020 18:20
Arts, 03.11.2020 18:20
History, 03.11.2020 18:20
Engineering, 03.11.2020 18:20
Social Studies, 03.11.2020 18:20
English, 03.11.2020 18:20
Biology, 03.11.2020 18:20