If an atom's mass number is 210 and its atomic number is 85, how many neutrons does it have?

What are the shared properties of metals and metalloids

Which of the following is an SI base unit for measuring length?

What is the pH of solution if the concentration of [H3O+] = 0.000558? 3.25 7.45 5.58 1.00

elect all of the true statements regarding chemical equilibrium. The concentrations of reactants and products are equal. The concentrations of reactants and products remain constant. Reactants are being converted to products and vice versa.

The combustion of gasoline produces carbon dioxide and water. Assume gasoline to be pure octane (C8H18) and calculate the mass (in kg) of carbon dioxide that is added to the atmosphere per 1.0 kg of octane burned.

Smoke fiilling up a room is diffusion or not

What is the independent and dependent variable for a dry ice experiment

a substance that undergoes a physical change like melting is still the same substance is it true or false

What is a polar molecule

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?