Which of the following items would have a mass of approximately 500 grains ? a, a bag of pretzels b, a car c, a recliner d, a microwave

Can someone me with 1 to 4 plz. fast

Amedication is given at a dosage of 3.000 mg of medication per kg of body weight. if 0.1500 g of medication is given, then what was the patient's weight in pounds (lbs)? there are 453.59g in 1 lb.

You wish to prepare a buffer consisting of acetic acid and sodium acetate with a total acetic acetate plus acetate concentration of 250 mm and a ph of 5. what concentrations of acetic acid and sodium acetate should you use