When the temperature of a 3.0 L sample of a gas is dropped from 200°C to 100°C what will be the final volume of the gas sample

In the 1920s, Edwin looked at the spectra of stars from distant galaxies. To his surprise, he found that all of these spectra were red-shifted, and that the more distant the galaxy, the greater the red shift.

3.45kilometers = Micrometers?

What is the reaction rate for a chemical reaction?

What is empirical and moleculer formula?.

Explain how interactions can be both beneficial and harmful to the organism in a community

How many grams of CuSO4 are there in 100.0 g of hydrate? How many moles?

Which student is determining the atomic mass of sodium?

Ionic compounds can conduct electricity when dissolved in water or melted, because a. the ions are free to move. b. they have no ions to contribute to the solution. c. the ions are fixed in place. d. they have shared electrons.

What does the number next to the ion signify?

Write a molecular equation for the precipitation reaction potassium chloride and lead (II) acetate