Which of the following is not a compound?

a. water

b. sugar salt

c. chocolate

d. chip cookies

How many moles of acetylene (C2H6) had occupy a volume of 3.25L at STP?

A solution is prepared by mixing 3.44 mol of acetone with 1.45 mol of cyclohexane at 30°c. calculate the χacetone and χcyclohexane in the vapor above the solution. p°acetone = 229.5 torr and p°cyclohexane = 97.6 torr.

Which is true regarding covalent substances placed in water? A. Covalent substances conduct electricity very well in water. B. The molecules aren't separated from one another by water molecules. C.

A synthesis reaction that is nonspontaneous and has a negative value for its heat of reaction will not occur until some heat is added nonspontaneous exothermic re actions need enough activation energy to get them started. A. T, T B. T, F C. F, T D.

Which scenario represents a scientific investigation A. A measurement of growth patterns of crystals in space B. A selection of favorite songs in a survey C. A questionnaire on the quality of care in a hospital D.

What is the atomic number of magnesium?

Explain how earth plates and lithosphere are related

What is the name for the Fe2 + cation? Iron ion Iron (II) ion Ironide Ferride ion

When designing an experimental investigation, why is it important to test only one variable?

Most fruit juices are a solution of water, sugar, and fruit-specific chemicals. in this solution, identify the solvent and solutes.