How many particles are in 400 grams of NaCl

3. Hydrochloric acid is used to clean metals. The acid reacts with the oxide layer on the surface of the metal, forming a salt and water. Which word describes the metal oxide? A alloy B base C element D indicator

Which diagram shows electrons violating the Pauli exclusion principle? A box contains an up arrow. A box contains an up arrow. A box contains an up arrow. A box contains an up and a down arrow. A box contains an up and a down arrow.

The mercury content of a stream was believed to be above the minimum considered safe-1 part per billion (ppb) by weight. an analysis indicated that the concentration was 0.68 parts per billion. what quantity of mercury in grams was present in 15.

Is salt water a mixture or a solution?

The equation of Newton's second law of motion can be written.

A balloon contains 1.00 mol helium gas at STP. What will the volume of the balloon be if the pressure increases to 2.00 atm?

If 100 mL of a gas were enclosed in a buret at 500 mm Hg, what volume would the gas occupy at 1000 mm Hg at the same temperature? P1V1=P2V2

Would Mn (HPO4) 2 be manganese (II) monohydrogen phosphate?

The fundamental frequency of a violin string is 440 hz. the frequency of its second harmonic is

How much of a 15.0M stock solution do you need to prepare 250ml of a 2.35ml hf solution?