Physical Science Homework!! Help!!?

Question

I have a take home test in the morning and I really need a good grade. I have 5 questions left that I'm just not sure about. Please help if you know how to do it. They are multiple choice.

Which volume unit is the largest?
kg/L/mm/kL/cm3

An order for a patient calls for 0.020 grams of medication. On hand are 4 mg tablets. What dose is needed for the patient?
2 tablets/8 tablets/4 tablets/10 tablets/5 tablets

A doctor orders 1500 mg of sulfa drug. Tablets in stock are 0.500 g. How many tablets are needed?
1
2 1/2
1 1/2
3
1/3

How many milimeters of a salt solution with a density of 1.8 g/mL are needed to provide 400 g of salt solution?
220 mL/400 mL/ 22 mL/ 4.5 mL/ 720 mL

Answer 1

1) Which volume unit is the largest?
kg/L/mm/kL/cm3

Ans: kL
Because: kg is a mass unit. mm is a length unit. kL = 1000 L. L = 1000 cm3.

2) An order for a patient calls for 0.020 grams of medication. On hand are 4 mg tablets. What dose is needed for the patient?

Ans: 5 tablets
Because: 0.020 grams = 20 milligrams. 20 mg divided by 4 mg per tablet = 5 tablets

3) A doctor orders 1500 mg of sulfa drug. Tablets in stock are 0.500 g. How many tablets are needed?

Ans: 3 tablets.
Because: Each tablet has 0.500 gram = 500 milligrams. 1500 mg divided by 500 mg per tablet = 3 tablets.

4) How many milimeters of a salt solution with a density of 1.8 g/mL are needed to provide 400 g of salt solution?
220 mL/400 mL/ 22 mL/ 4.5 mL/ 720 mL

Ans: 220 mL
I am not sure if you wrote this question correctly. The question asks for millimeters while the choices are in millilitres. Aside from that the answer is 222.22 mL, that is approx. 220mL

Because: 400 / 1.8 = 222.22

Answer 2

Question 1. largest volume is KL for kiloliter,
Question 2 would be 5 tablets 5 x 4mg = 20mg or 0.020 grams.
Question 3 is 3. 0.5 g is 500 mg. 500mg x 3 = 1500mg
Question 4, no answer I can find is totally accurate. A density of 1.8 g/ml means there is 1.8 g of salt per ml of solution. 220 ml of that solution would give (1.8x220) 396 g of salt, which is the closest answer.
I don't see a fifth question. If there is one go ahead and post it and I will try to answer it.

Answer 3

As you wind up on an identical factor an identical volume of artwork has been executed against the gravitational skill. and means = worrk / time so the elevator does an identical artwork in much less time and has the greater effective means output.