Chemistry, 17.01.2020 08:31, andybiersack154
Acup of water plugged by a brown cork is insulated by a second styrofoam cup. a black rod and a thermometer are inserted through the cork into the water. the thermometer is a, the water is b, the outer cup is c.
this part insulates the reaction chamber from the transfer
Answers: 2
Chemistry, 22.06.2019 01:00, deidaralove90
Look at the bean data from days 4–6. use these data to explain how natural selection changed the number of dark red walking beans over time. writing part
Answers: 3
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
Acup of water plugged by a brown cork is insulated by a second styrofoam cup. a black rod and a ther...
English, 29.01.2021 18:50
Mathematics, 29.01.2021 18:50
Mathematics, 29.01.2021 18:50