So I'm currently doing an undergrad Biology module which involves lots of Chemistry calculations. I thought doing a-level Chemistry would help but the basic conc=moles/volume and mass = Mr/moles is no longer sufficient.
I was wondering if anyone had any resources they recommended to help with the calculation side of things. Some examples of questions we need to be able to are things like:
- What volume of this solution of 1g NaCl in 100ml water would you use to make 500mL of a 10microgram/mL solution.
- You dilute the entire 500mL in 5L of water, what is the final conc of NaCl?
- What is the molarity of this NaCl conc?
We were given these questions to practice ready for an assignment and weren't told how to complete them and I have no idea. I've looked on Chemguide (my saviour for a-level chemistry lol) but to no avail.
Any advice or suggestions please?