A sample of hydrated calcium sulfate has a mass of 2.643 g. After dehydration, the sample has a mass of 2.090 g. What is the percent by mass of water in the hydrate?

Which of the following is not part of Dalton's atomic theory?

During the lab, you will have access to a range of acids and bases as well as universal pH indicator paper. Think about how you can use these tools to develop a color chart for the red cabbage indicator.

The bright-line spectrum of sodium is produced when energy is (1) absorbed as electrons move from higher to lower electron shells (2) absorbed as electrons move from lower to higher electron shells (3) released as electrons move from higher to lower

What are the reactants and products of fermentation?

360 grams of glucose, C6H12O6, is dissolved in 10 liters of solution. Determine the molarity (M)

Compared to the charge of a proton, the charge of all electron has (1) a greater magnitude and the same sign (2) a greater magnitude and the opposite sign (3) the same magnitude and the same sign (4) the same magnitude and the opposite sign

What's the definition of fossil

Calculate the molar concentration of oh - ions in a 0.555 m solution of hypobromite ion (bro-; kb=4.0*10-6).

The Specific heat of beryllium is

The first three electrons that enter into p orbitals must have a. parallel spins. b. opposite spins. c. low energy levels. d. opposite charges.