Which instrument is directly used to determine the relative masses of atoms?

(A) spectroscope

(B) Geiger counter

(C) mass spectrograph

(D) microbalance

(E) electron microscope

Which changes can reach dynamic equilibrium? 1. nuclear changes, only 2. chemical changes, only 3. nuclear and physical changes 4. chemical and physical changes

Which layer continues under the ocean to form the ocean crust

3) One lab section accidentally used Ba (OH) 2 instead of Ca (OH) 2 when they performed this experiment. The TA told them that the Ksp of Ba (OH) 2 is 2.55 x 10-4. What is the molar solubility of Ba (OH) 2

When the atoms of two substances joined to make a new substance the process is called?

Oxygen gas is formed when two oxygen atoms share electrons. Which kind of compound is oxygen gas? A) Mesonic B) Covalent C) ionic D) polyatomic ion

A very small equilibrium constant means ... a. an equal amount of reactants and products c. more products b. more reactants d. system isn't at equilibrium

What is in a banana? give me specifics?!

When 17.28 mL of a 0.078 M aqueous solution of Na2SO4 is combined with 11.30 mL of a 0.20 M aqueous solution of NaCl and 7.84 mL of a 0.26 M aqueous solution of KCl, what is the total concentration of Na + in the combined solution?

What mass of carbon can 3000 J of energy raise from 12°C to 40°C?

How do you balance __Mg + __HCl - - > __MgCl2 + ___ H2