From the list below, choose the mass of urea (Mr = 60.06 g/mole) that should be dissolved in 500 mL to prepare a solution of final concentration = 50 mM.

You are supplied with 10 mL saline solution at a concentration of 180 g/L, which needs to be diluted to a final concentration of 0.9%.  What volume (in mL) of water do you need to add?

From the list below, choose the mass of Vitamin D (M_r = 384.648 g/mole) that should be dissolved in 45.0 mL to prepare a solution of final concentration = 28.0 µM

Choose from the list below an example of a situation where the units of ppb are appropriate for reporting the concentration of a solute.

In a diagnostic test, the cell count may not be completely accurate, does this matter diagnostically?

If you think it doesn't matter, which of the following would be the BEST option to support your reason why it doesn't matter diagnostically....

In a diagnostic test, the cell count may not be completely accurate, does this matter diagnostically? 

If you think it matters, which of the following would be the BEST option to support your reason why it does matter diagnostically...

Match the following functions with the appropriate cell type

If the results of a FBE report a patient as having 1.8 x 10⁹ lymphocytes per litre, how many lymphocytes would you count in a μl? (enter number only)

A sample of blood was taken, and a 1 in 100 dilution made. The diluted sample was added to a haemocytometer and the cells counted in each of four of the central 1mm² sections. The number of cells counted were 7, 4, 6 and 7.

What is the average number of cells that was counted per μl?

Which of the following lists the elements in the correct size order, from the smallest to the largest?