Calculate the number of moles of potassium, K, in 1.21 x 1024 atoms of potassium

Nitric acid is usually purchased in a concentrated form that is 70.3% HNO3 by mass and has a density of 1.41 g/mL. How much concentrated solution would you take to prepare 1.15 L of 0.115M HNO3 by mixing with water?

Which statement is true about the gravitational force? A. It only acts on objects that are close to each other. B. It acts on all objects all of the time. C. It only acts on objects that are in contact. D.

The rate of disappearance of HCl was measured for the following reaction: CH3OH (aq) + HCl (aq) →CH3Cl (aq) + H2O (l) The following data were collected: Time (min) [HCl] (M) 0.0 1.85 54.0 1.58 107.0 1.36 215.0 1.02 430.0 0.

What are the 5 forces that cause erosion?

What does it mean to say that the electric current from a wall socket is "120 V AC"?

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume