The mass of a 50-mL volumetric flask is 40.638

g. After adding 15.0 mL of 95% ethanol and filling to the calibration mark with water, the flask weighed 88.219

g. What is the density of the mixture?

How is molarity measured? O A. In liters of water per moles of a dissolved substance B. In liters of water per gram of a dissolved substance O C. In moles of a substance for 1 g of that substance D. In moles of a substance dissolved in 1 L of water

Contains 63.65% nitrogen and 36.35% oxygen by mass what is the empirical formula for this compound

How many grams of oxygen are required to rect with 10.0 grams of octane in the combustion of octane gasoline?

Which of the characteristics below best describes organic compounds

Which of the following statements about the mechanism of the Diels-Alder reaction is true? A) Three pi bonds break; two sigma bonds and one pi bond form. B) Three pi bonds break; one sigma bond and two pi bonds form.

Describe the solubility of water compared to ethanol?

When the free-energy change (AG) of a reaction is negative, the reaction is said to be: Endergonic Non spontaneous Spontaneous Endothermic

The solubility of carbon dioxide gas in water can be increased by

What two quantities are conserved in every chemical reaction? a. moles and mass c. volume and mass b. mass and atoms d. moles and atoms?

What two chemical mechanisms change pyruvate to acetyl-CoA in the pyruvate dehydrogenase complex? Group of answer choices a) Decarboxylation and condensation. b) Oxidation and decarboxylation. c) Condensation and dehydrogenation.