you go out to dinner and the bill comes to $35.51. how much should you tip if you want the tip to be 20% of the bill.

Which is the correct Lewis structure for acetylene (C2H2) ?

Which would show an example of how physical changes are reversible? A cutting a gold bar in two pieces and then putting the pieces next to each other B burning a match and then relighting it C melting tin and then cooling it into a mold D combining

How can we make use of acids or bases to improve crop yields?

Name the 3 seperate metals group

23 An insect dies, and its body begins to decompose and become part of the soil. What is decomposing the insect's body? ОА. rain and wind OB A dead animal decomposes by itself. OC. fungi and bacteria in the soil OD. sunlight and air

Which equations represent precipitation reactions? More than one can be chosen. A. Na2S + FeBr2 → 2NaBr + FeS B. MgSO4 + CaCl2 → MgCl2 + CaSO4 C. LiOH + NH4I → LiI + NH4OH D. 2NaCl + K2S → Na2S + 2KCl E. AgNO3 + NaCl → AgCl + NaNO3

The amount of massin a given volume of air is

What is the molarity of a solution that contains 612 grams of CaCl2 in 3.04 liters of solution? 1.81 M 201 M 5.52 M

What is the empirical formula for naphthalene

Explain why a piece of aluminum or magnesium can be used to remove tarnish, which is mostly silver sulfide, on silverware.