A) Describe the preparation of 500mls of 10% formelin from a stock solution of concentration 40 %.
(10 marks)

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u

burning fossil fouls really decrease the carbon in the atmosphere so b