OXFORD COLLEGE: FINAL COLLEGE EXAM MATH REVIEW FOR THIS MODULE & JAN 2025 EXAM

How do you convert 30 degrees Celsius to Fahrenheit?

Use the formula F = (C × 9/5) + 32. Therefore, 30 C = 86 F.

How do you convert 150 degrees Fahrenheit to Celsius?

Use the formula C = (F - 32) × 5/9. Therefore, 150 F = 65.56 C.

How do you prepare a 35% w/w solution of aqueous NaCl?

Dissolve 35 grams of NaCl in enough water to make a total of 100 grams of solution.

How do you prepare a 35% v/v solution of aqueous NaCl?

Mix 35 mL of NaCl solution with enough water to make a total volume of 100 mL.

How much water must be added to 100 mL of 95% alcohol to create a 70% alcohol solution?

Add 50 mL of water.

How much water must be added to 100 mL of 55% alcohol to create a 40% alcohol solution?

Add 25 mL of water.

What is the volume of 16% KOH that can be made from 230 mL of 43% KOH?

You can make approximately 85.11 mL of 16% KOH solution.

What volume of 22% KOH can be made from 330 mL of 73% KOH?

You can make approximately 103.84 mL of 22% KOH solution.

What is the molarity of a solution made from 333 grams of a solute with a molecular weight of 22.9 in 3000 mL?

The molarity is approximately 6.42 M.

What is the molarity of a solution made from 251 grams of a solute with a molecular weight of 20.6 in 2000 mL?

The molarity is approximately 6.09 M.

How many grams of solute with a molecular weight of 24.9 are required for a 2500 mL of 1.5 M solution?

You would need 93.75 grams of the solute.

How many grams of solute with a molecular weight of 22.9 are required for a 3000 mL of 2.5 M solution?

You would need 171.75 grams of the solute.

How much solute is needed for a 500 mL of a 2% w/v solution?

You need 10 grams of solute.

How many significant digits are in 20.06630?

There are 6 significant digits.

How many significant digits are in 0.06678?

There are 4 significant digits.

What is 0.05653 x 10³?

0.05653 x 10³ = 56.53.

How do you convert 6.75 kL to dL?

6.75 kL = 675 dL.

How do you convert 1 mmol to moles?

1 mmol = 0.001 moles.

What percentage of values fall within +/- 1 SD of a mean in a normal Gaussian distribution?

Approximately 68% of values fall within +/- 1 SD.

What percentage of values fall within +/- 2 SD of a mean in a normal Gaussian distribution?

Approximately 95% of values fall within +/- 2 SD.

What percentage of values fall within +/- 3 SD of a mean in a normal Gaussian distribution?

Approximately 99.7% of values fall within +/- 3 SD.

What is the mean of the following set of values: 21, 19, 23, 18, 19, 21, 24, 20, 19?

The mean is 20.

What is the median of the following set of values: 21, 19, 23, 18, 19, 21, 24, 20, 19?

The median is 20.

What is the mode of the following set of values: 21, 19, 23, 18, 19, 21, 24, 20, 19?

The mode is 19.

Define precision in terms of measurements.

Precision refers to the consistency and reproducibility of measurements.

Define accuracy in terms of measurements.

Accuracy refers to how close a measurement is to the true value.

What is the coefficient of variation?

It is the ratio of the standard deviation to the mean, expressed as a percentage.

What is standard deviation?

Standard deviation is a measure of the amount of variation or dispersion in a set of values.

When is a quality control result considered out of control?

When it falls outside the established control limits.

What is a reference range?

It is the range of values that is considered normal for a particular test.