The specific heat of zinc is 0.39 j/g*��
c. how much energy needed to change the temperature o...
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, 22.06.2019 15:00
Which of the following is the correct formula for copper (i) sulfate trihydrate? cuso4 · 3h2o cuso4(h2o)3 cu2so4(h2o)3 cu2so4 · 3h2o
Answers: 1
Chemistry, 22.06.2019 20:00
Which of the following would not diffuse through the plasma membrane by means of simple diffusion? 1 oxygen 2 glucose 3 a steroid hormone 4 a lipid soluble vitamin
Answers: 3
Chemistry, 23.06.2019 00:30
An unknown insoluble substance displaced the water shown. it's mass is indicated on the triple beam balance. mass = a. 694 b. 693.5 c. 693.0 d.693.8
Answers: 1
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Chemistry, 04.05.2021 16:20
Chemistry, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20
Mathematics, 04.05.2021 16:20