What gives the gem amethyst its purplish color?

If 4.0 moles of X and 4.0 moles of Y react according to the hypothetical reaction below, how many moles of the excess reactant will be left over at the end of the reaction? 2X + 3Y yields X2Y3 1.3 mol Y left over 2.7 mol Y left over 1.

The reduced coenzymes generated by the citric acid cycle donate electrons in a series of reactions called the electron transport chain. The energy from the electron transport chain is used for oxidative phosphorylation.

What is the mass of a glucose solution that fills a 0.500-L intravenous bottle if the density of the glucose solution is 1.15 g/mL?

What is the charge of NH3?

Which question cannot be explained by chemistry? A. How does yeast make bread dough rise? B. Why does sugar dissolve faster in hot water? C. How does a convection oven cook food? D. Why do peeled apples turn brown in air?

How many isomers does propane have? 2 6 3 5

Calculate the mass of solid ammonium chloride required to mix with 100 ml of 1.0m ammonia to prepare a 9.25 ph buffer

Which of the following shows the abbreviation for an SI unit of density? A. lb/mL B. g/cm3 C. L/kg D. kg/m2

Cellulose, chitin, and peptidoglycan function as structural molecules and are extraordinarily resistant to degradation and decay. which structural feature is most directly responsible?

Which statement is the best example of pseudoscience? A. J. joined a group that studies phrenology. Kathleen joined a group that studies endangered species. Joe joined a group that studies herbal remedies.