Marking !
complete a combining ratio of lithium and oxygen....
Answers: 3
Chemistry, 21.06.2019 15:30
On a distance vs time graph the line of an object at rest is a
Answers: 1
Chemistry, 21.06.2019 18:00
Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?
Answers: 3
Chemistry, 21.06.2019 20:00
Drag each number to the correct location on the equation. each number can be used more than once, but not all numbers will be used. balance the equation with the coefficients. 2 3 4 5 kclo3 -> kcl + o2
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) β h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 Β°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
Health, 03.02.2020 14:55
Mathematics, 03.02.2020 14:55
History, 03.02.2020 14:55
Mathematics, 03.02.2020 14:55
Chemistry, 03.02.2020 14:55
History, 03.02.2020 14:55
Mathematics, 03.02.2020 14:55
Mathematics, 03.02.2020 14:55
Mathematics, 03.02.2020 14:55
Mathematics, 03.02.2020 14:55
Mathematics, 03.02.2020 14:55
Mathematics, 03.02.2020 14:56