I can\'t get the complete steps with chemistry, Please help and show the steps T

Question

I can't get the complete steps with chemistry, Please help and show the steps Thank you,

Changes in concentration. In the food-processing lab you are making white rice by removing the rice bran from brown rice. If the bran contains 876 ppb of arsenic and the brown rice contains 432 ppb, what is the concentration in the white rice if you remove 10% of the mass during the milling process? ___________

Eating and drinking. Your drinking water contains 5 ppb inorganic arsenic. You drink 800 mL per day and when cooking rice use 500 mL by a method in which all of the water is absorbed. If you eat 45 g of rice containing 126 ppb of inorganic arsenic twice per week and you weigh 70 kg, what is your dose (in

Explanation / Answer

if you mean to remove all total mass of white rice then you have the following balance

we have:
brown rice white rice bran
876 432 =1308 ppb(100%)
788.4 388.8 = 1177.2 ppb (90%)

good if one refers to the ingested dose rice you have the following:
((252/1000000000) * 1000) /7=3.6*10-5 mg and if I weigh 70kg, only splits:
daily dose = 5.143 * 10-7 mg / kg of arsenic daily

Related Questions

Navigate

• Browse (All)
• Browse I
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.