why does the momentum before a collision equal the momentum after a collision?
because velocity is conserved
because force times mass equals acceleration
because momentum is conserved
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Determine the percent sulfuric acid by mass of a 1.61 m aqueous solution of h2so4. %

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.