Given a stock standard solution of concentration 0.200 M, calculate the volume in mL required to make up calibration standards of the following concentrations (in 25.0 mL volumetric flasks)

1.60 x 10-2 M ... mL

Using stoichiometry, determine the mass of powdered drink mix needed to make 1.0 M solution of 100 mL

Use the dot structure on the right and the Periodic Table to determine the element represented. sodium (Na) potassium (K) neon (Ne) argon (Ar)

How many ions are present in 9.4g of pottasium oxide K2O? (K=39, O=16) (Avogadros constant=6.0*10^23/mol)

An iron ore was found to contain 92.0% pyrite (fool's gold). Pyrite has the formula FeS2and is 46.5% iron. How many grams of iron are there in 50.8 grams of iron ore?

Which of the following is NOT a basic feature of an electric circuit? a. resistor c. single throw b. cell d. wire

What are substances called whose solutions conduct electricity?

How many atoms does sodium silulfide have?

Calculate the molar mass of Al (OH) 3.

Lava is rock that has undergone a physical change and has liquefied. What is known about this change? A. The lava gained mass. B. The lava was burned into smoke. C. The lava can cool back into rock. D. The lava lost mass.

Which solution is the most concentrated? 2.0 mL of 10 M H2SO4, where H2SO4 has a molar mass of 98 g/mol 5.0 mL of 1.0 M PbSO4, where PbSO4 has a molar mass of 303 g/mol 2.0 mL of 10.