ap chem 3

If 50. mL of 1.0 M NaOH is diluted with distilled water to a volume of 2.0 L, the concentration of the resulting solution is

0.025 M

he original solution used to make the solutions for the standard curve was prepared by dissolving 2.60g of CoCl2 (molar mass 130.g/mol) in enough water to make 100.mL of solution. What is the molar concentration of the solution? Responses

0.200 M

A 0.20 mol sample of MgCl2(s) and a 0.10 mol sample of KCl(s) are dissolved in water and diluted to 500 mL. What is the concentration of Cl- in the solution?

1.0 M

A sample of gas at 822 kPa and volume of 312cm3 is increased to 948 kPa, what is the newvolume if the temperature remains constant

290 idk

Microwave radiation has a wavelength on the order of 3.2 cm. Calculate the frequency and the energy of a single photon of this radiation.

3.7 j mol

A wavelength of 510nm corresponds to an approximate frequency of 6×10^14s−1. What is the approximate energy of one photon of this light?

4 times 10^19

When 70. milliliter of 3.0-molar Na2CO3 is added to 30. milliliters of 1.0-molar NaHCO3 the resulting concentration of Na+ is Responses

4.5 M

Which of the following is closest to the frequency of the light with photon energy of 3.3×10^−19J?

5.0 times 10^14 s^-1