SI Units
What is the SI unit of base for nano? give both the SI base power of 10 along with the prefix
nano , 10-9
21.4 + 22.0 ?
43.4
You have 2.62 x 104 nanograms of an antibiotic that must be administered to a patient intravenously. The protocol calls for the drug to be given in terms of cubic centimeters. How many cubic centimeters need to be given? The density of the liquid solution is the density of water where 1 ml = 1 gram.
2.62 x 10-5 cubic centimeters.
1 ml = 1 cc
and since 1 ml = 1 grams in this instance, you basically just convert to grams.
4.6 x 12.2565
56
How many sig figs in? 1.2
2
1 x 10-3 grams is how many mg?
1 mg
345.6 + 22.231
367.8
Small scale chemical synthesis of Ammonium Nitrate has been performed with a yield of 2.254 kilograms of substance made. How many pounds of Ammonium Nitrate is this ?
1 pound = 453.92 grams
4.966 pounds
12.32 x 27.01
332.8
How many sig figs in 2.001
4
Femtochemistry is a type of chemistry that measures reactions in split seconds, what is the SI base unit for femto?
10-15
0.0002 + 22.87454
22.8748
A patient is admitted to the ER who is suspected of shock. Lab results come back and state the patient has only 4.5 x 10-6 red blood cells per cubic milliliter of blood. Erythropoetin, is a drug that stimulates red blood cell synthesis and must be given to the patient where 1 mg for every 2.0 x 10-3 red blood cells present per cubic milliliter is given. How much drug is needed for the patient?
2.3 x 10-2 mg of drug must be administered.
24.89 / 2.63 + 1.2
10.7
How many sig figs in 200.
3
Chemists take water samples of the local lake and find that a local pesticide has polluted the water. The concentration present is 1 part per trillionth. What is the SI base that represents a trillionth?
10-12
0.23121 -0.01
0.22
A nuclear apocalypse occurs where food must be used as currency. Bob is trying to procure as many eggplants as he can. Bob has three loaves of bread where 1 loaf is equal to two apples. if 12 apples is equal to 4 eggplants, how many eggplants (even as a fraction) can he afford?
2 eggplants
0.00003/0.002
0.02
4
The United States federal budget determine that they are in debt quadrillions of dollars? what is the SI base to represent a quadrillion? How many zeros is this?
1012 , 12 zeros
45.02 - 1.2
43.8
Certain antibiotics are effective at preventing the replication of bacteria. Clindamycin kills 7.4 x 103 bacteria every 15 seconds at a dose of 25 mg. A culture of a patients sputum has been incubated and it is found that the patient has 4.6 x 108 bacteria for every 1 kg of body weight. If the patient weighs 46 kg, How much Clindamycin is needed to kill all the bacteria in his body? How many seconds will this take?
7.1 x 105 mg will be needed. (yikes thats alot of pills!)
430,000 seconds needed (when taking sig figs into consideration)
2.02 /0.0254 +14.2 -3.76
167.92
6