If crown b is more dense than crown a then which is pure gold

Why do you cool down tea extract in ice to below 40°c before adding dichloromethane?

Your roommate is interested in using a preservative that will prevent fruits from undergoing a change in color and flavor caused by exposure to oxygen. Which preservative would you recommend?

What is the value for ∆Soreaction for the following reaction, given the standard entropy values? 2 Al (s) + 3Cl2 (g) 2AlCl3 (s)

A red blood cell placed in distilled water will swell due to the diffusion of

V=nT/P Which law was used to determine the relationship between the volume and the number of moles in this equation? Boyle's law Charles's law Avogadro's law Gay-Lussac's law

Which formula id correctly paired with its name? A. MgSO↓ = magnesium chlorine B. FeO = iron (|||) oxide C. K↓2O = Phosphorus dioxide D. CuCI↓2 = copper (||) chloride

Which of the following correctly explains the role of enzymes in biochemical reactions? A) Enzymes provide energy in the form of ATP to lower the activation energy needed for the reaction.

How does being a landlord relate to chemistry in any way

Element m has an ellectronegativity of less than 1.2 and reacts with bromine to form the compound MBr2. Element M could be?

Which situation describes evidence of a chemical change? A. When food color is added to water, it changes color. B. A solid changes into liquid when heated. C. A solution feels warm after a cool solid is added to it. D.