Answers: 1
Chemistry, 21.06.2019 20:00
Different isotopes indicate that an element will have different numbers of
Answers: 2
Chemistry, 22.06.2019 09:00
Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?
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
Is neon a metal metalloid or nonmetal...
Mathematics, 18.03.2021 01:20
Mathematics, 18.03.2021 01:20
English, 18.03.2021 01:20
Mathematics, 18.03.2021 01:20
Mathematics, 18.03.2021 01:20
Mathematics, 18.03.2021 01:20
Mathematics, 18.03.2021 01:20
Mathematics, 18.03.2021 01:20
Mathematics, 18.03.2021 01:20
English, 18.03.2021 01:20