Which of the following devices is based on the property of thermal expansion?

a. balance

b. calorimeter

c. convection oven

d. thermometer

Determine the percent composition of CH2O.

If the solution process is endothermic, then an increase in temperature usually results in: an increase in solubility a decrease in solubility no change in the solubility a slower reaction

Nic bought 12 pens for 2$ each and 12pads of paper for 3$ each. Write two expressions for how nic could calculate his total. Write one expression in expanded form and one in factored form.

What is the molarity of a 15% solution of sodium chloride (nacl) if the molecular weight of nacl is 58.44 g/mol?

Given the balanced equation, calculate the mass of product that can be prepared from 2.70 g of zinc metal. 2Zn (s) + O2 (g) →2ZnO (s)

Which best describes the definition of Lewis acids and bases? a general definition based on electron structure a general definition based on hydrogen ion concentration a specific definition based on a compound's ability to accept protons a specific

Question 22 Which change would cause the volume of a balloon to increase? A increasing the temperature of the balloon B increasing the atmospheric pressure C removing gas from the balloon D placing the balloon under water

Wilma dissolves 10,00 grams of glucose with water and the final volume of solute and solvent is 66.67 mL. What is the concentration of glucose in her solution? a. 10% (m/v) O b. 15.% (mv) O c. 25 % (m/v) d. 30.% (m/v) e. None of the above.

Explain the relationship between the observations and the hypothesis

Be sure to answer all parts. Be sure to report your answer to the correct number of significant figures. Determine Kb of the weak base B whose conjugate acid HB + has Ka 6.6 * 10-4.