Answer:
The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.
Explanation:
Number of hours worker exposed to xylene =
The concentration of xylene in the workplace =
The worker is inhaling air at a rate of .
Amount xylene inhaled by worker in an hour :
=
Amount xylene inhaled by worker in 320 hours:
1 μg = 0.001 mg
Amount xylene inhaled by worker in 320 hours = 11.520 mg
1 day = 24 hours
Amount xylene inhaled by worker in 1 day:
Assuming 70 kg body mass, the chronic daily intake of xylene :
The chronic daily intake during the period of exposure is most nearly 0.012 mg/kg day.
Answer:
Explanation:
Such type of compounds that have hydrogen, oxygen and one other element like Chlorine, Bromine etc and one hydrogen atom is directly connected with oxygen atom are called as oxyacid.
The acidic strength of such oxyacid which contains same element is determined by the number of oxygen atoms. Such as in the case of , is the weakest acid because it has only two oxygen while is the strongest acid because it has four oxygen atoms.
When the compound contains same number of oxygen and hydrogen atoms but one different element then the acidic strength depends on the electronegativity of the element. So in the case of , is the weakest acid because it contain iodine element that has less electronegativity while is strongest acid because chlorine atom has high electronegativity. So the overall order in weakest to strongest will be .
A student is asked to convert measurements from meters to millimeters and from millimeters to meters. His answers are shown in bold in the choices shown below. The choice that he make a mistake is <span>9070 mm = 90.7 m. It must be 9.07m</span>
Answer:
H2SO4
Explanation:
In 100 g of the compound we hgave
2.00 g H, 32.7 g S and 65.3 g O.
2g* 1 mol/g = 2.0 mol H
32.7 g S * 1 mol/32.1 g = 1.02 mol S
65.3 g 0 * 1 mol/16 g = 4.08 mol O
2.0 mol H : 1.02 mol S : 4.08 mol O = 2 mol H : 1 mol S : 4 mol O
H2SO4