Chemistry Review Problems

Attached are some chemistry review problems that I am having trouble with.

Lewis Dot Structures

What is the chemical formula for ammonium periodate? 3. How many moles of sulfur dioxide are contained in 5.23 liters of the gas at 852 mm Hg and 28.0°C? Remember that 1 mole of any gas at STP occupies 22.4 L. 4. (2 points) A person standing 3.50 meters from a X-ray source receives a dose of 2.0 rads per minute. If t ...continues

Understanding the dissolution of salt in water.

In a solution of salt disolved in water, what will happen to the NaCL when it enters the water and why will it happen?

Diffusion, Osmosis

You have a solution with 12g of salt that is dissolved in 1L of water. In the beaker there is 100g of salt dissolved in 1L of water. What is the Eq concentration of the two solutions? Does this cause the salt to diffuse out of the bag or into it? Will the H2O osmosis out or into the bag?

Converting DNA into a protein.

Convert the following piece of DNA into a protein. A T C T G T G C C C A A G A T A T C

The relationship between ATP and Cells.

If you were to destroy all the ATP in a cell how would it affect osmosis, diffusion and active transport?

Calculating the percentage concentration of two solutions in regards to diffusion.

You have a mixed solution in a beaker which contains a bag of 4g dissolved in 15ML of water. The beaker contains 50g of glucose dissolved in 200mL of water. What is the percentage concentration of the two solutions? Does the glucose diffuse out or into the bag? And what will happen to the water?

Calculating the average atomic mass of an element using the natural abundance percentages and the atomic mass of its isotopes.

What is the average molar atomic weight of chlorine, if the natural abundance of Cl-35 and Cl-37 isotopes are 75.4 molar % and 24.6 molar %, respectively? M(Cl-35) = 34.969 g/mole M(Cl-37) = 36.966 g/mole

Titration: Determining the equivalence point and pH of a strong base and weak acid. Solution complete with fully labeled titration curve.

A sample of 0.0054 mol propanoic acid was dissolved in water to give 50ml solution. This solution is titrated with 0.150 M of NaOH. Draw the expected titration curve labeling the equivalence point (including the volume of NaOH added and the pH) and show the pKa point (labeling the pH value and volume of NaOH added)

Reaction

Which of the following statement is true? a. A heterogenous catalyst is in a different phase from the reaction mixture b. Enzymes are protein molecules which catalyze reactions c. Catalysts are not consumed in reactions d. Answers a and b are true e. Answers a, b, and c are true