The human body normally excretes about 2.0 g of potassium per day via the urine. Express the mass of potassium in mg.

2000 mg

Explanation:

It is given that, the human body normally excretes about 2.0 g of potassium per day via the urine. We need to find the mass of potassium in mg i.e. milligram

We know that,

1 gram = 1000 milligram

To convert 2 gram to mg, it can be done as follows :

2 gram = 1000 × 2 mg

= 2000 mg

Hence, the mass of potassium is 2000 mg.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

1 is the answer to this problem