Mol aqueous
A chemist must prepare 100 ml of 1.00 M aqueous barium acetate (Ba(C, H,02),) working solution. She'll do this by pouring out some 2.44
barium acetate stock solution into a graduated cylinder and diluting it with distilled water.
Calculate the volume in ml of the barium acetate stock solution that the chemist should pour out. Be sure your answer has the correct number of significant
digits.
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Use examples from the article to explain one positive and one negative effect that chemistry has had on society

How many miles of water are produced if 5.43 mol pbo2 are consumed

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.)