Atoms of Mg = mol * L
mol of Mg =
=
= 2 mol
∴ atoms of Mg = 2 mol * ( 6.02 x 10²³)
= 1.204 x 10²⁴
Answer:
3.5 g
Explanation:
The density of water is 1 g/mL. The mass (m) corresponding to 20.0 mL is 20.0 g.
We can calculate the heat (Q) required to raise the temperature of 20.0 mL of water 1 °C (ΔT).
Q = c × m × ΔT = 1 cal/g.°C × 20.0 g × 1 °C = 20 cal
where,
c is the specific heat capacity of water
There are 160 calories in 28 g of Cheetos. The mass that releases 20 cal is:
20 cal × (28 g/160 cal) = 3.5 g
The density of urine decreases when a diabetic secretes too much sugar.
When there is excess sugar in the blood, the kidneys release extra water.
The result is a <em>more dilute</em> and therefore <em>less dense urine</em>.
The urine from a non-diabetic person usually has a density of 1.010 g/mL to 1.025 g/mL.
The urine from a diabetic person often has a density less than 1.008 g/mL.
Answer:
1. solid, 2.liquid, 3.gas.
