Why might a scientist repeat an experiment if she did not make a mistake in the first one?

What is the name of the compound in cabbage juice that causes the color to change in an acid or base?

What mostly contains the atoms of two or more types of elements. The number of atoms can range from two to many thousands

A 450.0 mL sample of a 0.242 M solution of silver nitrate is mixed with 400.0 mL of 0.200 M calcium chloride. What is the concentration of Cl - in solution after the reaction is complete?

A small rock with a mass of 6 g is dropped into a graduated cylinder with 20 mL of water the water rises to 23 mL what is the density of the rock

1) How many moles are in 25.0 grams of water? 2) How many grams are in 4.500 moles of Li2O? 3) How many molecules are in 23.0 moles of oxygen? 4) How many moles are in 3.4 x 1023 molecules of H2SO4? 5) How many molecules are in 25.

In an acid-base titration, of 20 ml of a m HCI solution with 1 m NaOH. How many ml of NaOH are needed

Which of the following is not a source of air pollution related to human activities

Objects and substances in motion is I

If you were to remove an electron from a sodium atom that has eleven protons, what would be the electrical charge of the ion?

The atomic mass of fluorine in 19.0 amu, so the molar mass is?