In the presence of a base, red litmus paper will
1.) turn blue
2.) stay red
3.) t...
Chemistry, 06.10.2019 17:30 karnun1201
In the presence of a base, red litmus paper will
1.) turn blue
2.) stay red
3.) turn purple
Answers: 1
Chemistry, 22.06.2019 05:30
Arecipe calls for 1.2 cups of oil. how many liters of oil is this?
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, 23.06.2019 01:00
Which polymers are most closely related? a. protein and nucleic acids b. cellulose and starch c. nucleic acids and starch d. nucleic acids and cellulose
Answers: 2
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