How many grams of NaCl are needed to prepare 1.20 liters of a 2.00 M solution?

How many protons does mercury have?

One of the lines of Hydrogen has a wavelength of 486.1 nm. If a cloud of Hydrogen gas is moving towards us at 100 km/sec, what will we detect?

The three particles that make up atoms are a. protons, neutrons, and electrons. b. neutrons, isotopes, and electrons. c. positives, negatives, and neutrals. d. protons, neutrons, and isotopes.

When a soda is poured into a glass and the soda bubbles, is it the result of a chemical change? explain your answer?

Which description is true of 0.02 M Ca (OH) 2 if Ca (OH) 2 completely dissociates in water? A. It's a dilute strong acid. B. It's a dilute strong base. C. It's a dilute weak base. D. It's a concentrated weak base. E. It's a concentrated weak acid.

Extend E1 Explain why the arrangement, movement and energy of particles change during changes of state.

What is in a banana? give me specifics?!

Addition of an excess of lead (II) nitrate to a 50.0mL solution of magnesium chloride caused a formation of 7.35g of lead (II) chloride precipitate. What was the molar concentration of chloride ions in the solution (in mol/L) ?

2.70 L of a gas has a pressure of 0.63 atm. What is the volume of the gas at 105 kPa?

Which statements describe Rutherford's model of the atom? Select all that apply.