Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen MICHAEL MESUES
reaction?
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a) The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.

b) The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the products.

c) The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the products.

d)The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the products
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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.)