Chemistry, 28.10.2020 21:10 Dmoney7784
Periodic table/what do the elements in group 2 have in common pls help
a/they are all found in nature
b/they are all highly reactive nonmetals
c/they tend to form ions with a +2 electric charge
d/they tend to form ions with a -2 electric charge
Answers: 3
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Which formula can be used to calculate the molar mass of hydrogen peroxide
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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
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Consider the following reaction at equilibrium: c(s)+h2o(g)⇌co(g)+h2(g) predict whether the reaction will shift left, shift right, or remain unchanged upon each of the following disturbances. a) c is added to the reaction mixture. b) h2ois condensed and removed from the reaction mixture c) co is added to the reaction mixture d) h2 is removed from the reaction mixture.
Answers: 3
Periodic table/what do the elements in group 2 have in common pls help
a/they are all found in natu...
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