14. Which block in the periodic table contains the metalloids?
O A. p block
OB. s block
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Chemistry, 06.06.2021 23:00, genyjoannerubiera
14. Which block in the periodic table contains the metalloids?
O A. p block
OB. s block
O C. d block
D. f block
Answers: 1
Chemistry, 22.06.2019 08:30, Blaise2653
Joan writes four numbers on the board in standard form, and then she writes their scientific notation
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Chemistry, 22.06.2019 10:40, trinityanne1738
Asolid that forms and separates from a liquid mixture is called
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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) 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
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