A 500 mL bottle of water contains 100 ppm of calcium.  The recommended daily intake of calcium for teenagers is 1300 mg. How many bottles of water would you need to drink in order get this amount of calcium?  (note:  the density of water is 1 g/mL)

I think it’s 3.15grams

A student notices that her father (who is trying to lose weight) is drinking a lot of diet Pepsi with the artificial sweetener aspartame. The student has read that aspartame, at high doses, may be a carcinogen. She has read that the FDA recommends no more than 50.0 mg of aspartame per kg of body weight per day. Given that her father weighs 175 pounds, how many cans of diet Pepsi can he “safely” consume per day? (453.6 g/1 pound; 177 mg aspartame/can diet Pepsi)

The physician orders 0.2 g of zidovudine every 4 hours for an HIV patient. The medication is available as tablets of 100mg. How many tablets must be dispensed to this patient to provide him with enough tablets for a whole week’s supply?

A chardonnay wine is 13.5 percent by mass alcohol. If we consume 24 fluid oz of wine, and the density of the wine is 0.982 mg/mL, how much alcohol was consumed? 09.6 x 103 g alcohol O 301 g alcohol O 94 g alcohol O 106 g alcohol O 13.3 g alcohol

A suspension of pediatric Tylenol is sold as a concentration of the active ingredient is 32 mg/mL. If the dosage is 0.125 g per 45-lb pound body weight, how much is necessary to give a child weighing 85.4 lbs.

A particular beer is 6.50 (C₂H₆O). If a single bottle of beer contains 750ml of beer , what mass, in g of ethanol (C₂H₆O), is present in the bottle? The density of ethanol is 0.789 g ethanol/ mL ethanol .

A chemist prepares a solution of nickel(II) chloride (NiCl₂) by measuring out 2.1 × 10² μmol of nickel(II) chloride into a 350. mL. volumetric flask and filling the flask to the mark with water. Calculate the concentration in μmol/L of the chemist's nickel(II) chloride solution. Round your answer to 2 significant digits. 0 μmol L x10

A fish is reported to contain 3.3 ppm mercury. How much fish would have to be eaten to ingest 3.9×10^-3 grams of mercury?

Assume the recommended single dose of ibuprofen for children over the age of two is 4.5 mg per pound (mg/lb) of body weight. Use this guideline to calculate a single dose in milligrams for a five-year-old child who weighs 47 lb. dosage: mg