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Chemistry, 21.06.2019 20:30
When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product
Answers: 3
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 19:30
What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm
Answers: 3
Social Studies, 24.07.2019 05:00
Mathematics, 24.07.2019 05:00
History, 24.07.2019 05:00
History, 24.07.2019 05:00
Mathematics, 24.07.2019 05:00
Mathematics, 24.07.2019 05:00