Chemistry, 17.04.2021 18:50, wronganswer1026
What is the pH of a solution that is 0.17M HA and 0.50M A-. Ka HA=2.87x10-9
Answers: 3
Chemistry, 22.06.2019 11:20, ashiteru123
Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.
Answers: 2
Chemistry, 22.06.2019 11:40, Wemaybewrong
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, BakerElsie02
Which of the following units is not an official si unit? mole liter kilogram ampere
Answers: 1
What is the pH of a solution that is 0.17M HA and 0.50M A-. Ka HA=2.87x10-9...
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