What did Robert Millikan's oil drop experiment prove?

A. Atoms are composed of positive charges.

B. It determined the actual mass of the electron.

C. Matter can be conserved.

D. Atoms can be neither created nor destroyed.

What is the Lewis structure of Nitrogen triiodide?

Why is a solution not a pure substance

All of the following describe work being done except: A. standing in line to pay for groceries B. putting bags of groceries down on a counter C. lifting bags of groceries out of the trunk of a car D. putting groceries away in the cupboard

The synthesis of water proceeds according to this equation: 2H2 (g) + O2 (g) arrow to 2H2O (g) How can the rate of this reaction be increased? A. by increasing the temperature of the reactants B. by increasing the temperature of the products C.

For each strong acid solutions, determine [h3o+],[oh-], and ph. 0.28 m hcl

You need to make 10 mL of 2 mg/ml solution of protein and you have 25 mg/mL solution. How much protein solution and water do you need to mix in order to make the required solution?

The definition of volume is? a) width*height b) the space occupied by mass c) the space occupied by a liquid d) the mass of liquid required to fill a container

What is the empirical formula of a substance that is 53.5% C, 15.5% H, 31.1% N?

What is the lowest layer of the atmosphere and what is its highest altitude?

An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom?