MADD Calculation Questions
The atomic weight of Mg is 24, S is 32, O is 16. How much does 0.15 moles of MgSO4 weigh?
18g
You have stock solutions of 2M buffer and 100mM substrate. What volumes of buffer and substrate must you add in a 5mL assay to get final concentration of 0.4M buffer and 5mM substrate?
1mL buffer
The molecular weight of compound X is 115. You are given a 0.2 M solution of compound X. What is the % (w/v) concentration of this solution?
2.3%
The atomic mass of carbon is 12 The atomic mass of chlorine is 35.5 How much does 0.015 moles of carbon tetrachloride (CCl4) weight?
2.31g
The atomic weight of Mg is 24. The atomic weight of S is 32. The atomi weight of O is 16. How much does 0.02 moles of MgSO4 weigh?
2.4g
What is the molar concentration of a 11.5% solution of ethanol C2H5OH? Atomic weights: carbon is 12, hydrogen is 1, oxygen is 16
2.5
The molecular weight of glucose is 180. If the concentration of glucose in blood is 5mM how many grams of glucose are there in 2.8L of blood?
2.52g
You have a 3.2M solution of drug in water and need to dilute it to a 80mM solution. What volume of drug and what volume of water must you add to obtain 100mL of a 80mM solution?
2.5mL drug
The molecular weight of drug Z is 202.5. How many grams of drug Z are there in 500 mL of a 0.2 M solution?
20.25g
The molecular weight of drug Z is 820. How many grams of drug Z are there in 100mL of a 0.25M solution?
20.5g
You are provided with 45 ug/uL solution of drug B. The molecular weight of drug B is 225 What is the mM concentration of the drug B solution?
200mM
You are provided with a 33 mG/mL solution of drug B. The molecular weight of drug B is 165. What is the mM concentration of the drug B solution?
200mM
The atomic mass of sulfur is 32. The atomic mass of oxygen is 16. The atomic mass of chlorine is 35. How much does 1.5 moles of sulfuryl chloride (SO2Cl2) weigh?
201g
The molecular weight of NaOH is 40. How many grams of NaOH must be dissolved in 2.5L of water to give a 0.2M solution?
20g
The molecular weight of sodium fluoride is 42. How many grams of NaF must be dissolved in 10L of water to give a 0.25M solution?
210g
An enyzme assay contains 550 uL of Tris HCl buffer. How many assays can you carry out if you have 12.1 mL of Tris HCl buffer?
22
A 2.5M solution of a compound contained 55g/100mL. What is the molecular weight of the compound?
220g/L
How many grams are in 750mL of a 30% (w/v) solution?
225g
You have a 25% (w/v) solution of drug in water and need to dilute it to 5% (w/v) solution. What volume of drug and what volume of water must you add to obtain 120mL of 5% solution?
24ml drug and 96mL water
You are provided with a 8mg/ml solution of drug B. The molecular weight of drug B is 320. What is the mM concentration of the drug B solution?
25mM
How many grams are in 450mL of a 60% (w/v) solution?
270g
Saline is a 0.9% (w/v) solution of NaCl. How many grams of NaCl do you need to dissolve in water to make 30L of saline?
270g
How many grams of NaCl do you need to dissolve in water to make 7L of 4% (w/v) saline solution?
280g
What volume of a 1.6 M buffer must be added to an assay whose final volume is 50 mL to achieve a final concentration of 0.064 M?
2mL
You are asked to make up 600 mL of a 0.015M solution of drug X. You are provided with a 4.5M stock solution. What volume of stock solution and what volume of water must you add to obtain 600mL of 0.015M of drug X?
2mL
The molecular weight of glucose is 180. If the concentration of glucose in blood is 5mM how many grams of glucose are there in 3.5L of blood?
3.15g
How many grams of NaCl do you need to dissolve in water to make a 2.5L of a 12% (w/v) saline solution?
300g
A 3.0M solution of compound contained 99g/100mL. What is the molecular weight of the compound?
330
How many grams are in 500mL of a 60% solution?
330g
How many grams are there in 2.6L of 14% (w/v) solution?
354g
How many grams of NaCl do you need to dissolve in water to make 3L of a 12% (w/v) solution)?
360g
You are asked to make up 600mL of 0.01M solution of drug X. You are provided with a 2M stock solution. What volume of stock solution and what volume of water must you add to obtain 600mL of 0.01M of drug X?
3mL stock and 597mL H2O
An enyzme assay contains 350µL of Tris HCl buffer. How many assays can you carry out if you have 14mL of Tris HCl buffer?
40
An enzyme assay has a final volume of 0.4mL. Each assay contains 120 uL of phosphate buffer. How many assays can you carry out if you have 4.8mL of phosphate buffer?
40
A 1.25 M solution of a compound contained 50 g/100 mL. What is the molecular weight of the compound?
400
How many nL are there in 40L of solution?
40000000000
You are provided with 55mg/mL solution of drug B. The molecular weight of drug B is 137.5. What is the mM concentration the drug B solution?
400mM
The molecular weight of NaOH is 40. How many grams of NaOH must be dissolved in 5 L of water to give a 0.2 M solution?
40g
A stock solution of SDS is 10% (w/v). How much SDS do you need to add together to get 200mL of a 2% solution?
40mL
You are provided with a 6mg/mL solution of drug Z. The molecular weight of drug Z is 150. What is the mM concentration of the drug Z in solution?
40mM
You are provided with a 7mg/mL solution of drug Z. The molecular weight of drug Z is 175. What is the mM concentration of the drug Z solution?
40mM
The molecular weight of drug Z is 820. How many grams of drug Z are there in 200mL of a 0.25M solution?
41g
The atomic weight of potassium is 39, oxygen is 16 and hydrogen is 1. How much does 0.8 moles of potassium hydroxide (KOH) weigh?
44.8g
A 2.0M solution of a compound contained 88g/100mL. What is the molecular weight of the compound?
440
How many grams are there in 1500mL of a 30% (w/v) solution?
450g
How many grams of NaCl do you need to dissolve in water to make 12L of 4% (w/v) saline solution?
480
How many grams are in 4.0L of a 12% (w/v) solution?
480g
What is the molar concentration of a 23 % solution of ethanol C2H5OH The atomic weight of carbon is 12 The atomic weight of hydrogen is 1 The atomic weight of oxygen is 16
5
You have a 2M solution of drug X in water and need to dilute it to 40mM solution. What volume of drug solution and what ovlume of water must you add to obtain 250mL of 40mM solution?
5 mL drug and 245 mL water
The molecular weight of glucose is 180. If the concentration in a solution is 15mM how many grams of glucose are there in 2L of this glucose solution?
5.4g
An enzyme assay has a final volume of 0.81mL. Each assay contains 40μL of phosphate buffer. How many assays can you carry out if you have 2mL of phosphate buffer?
50 assays
The molecular weight of compound A is 125. You are asked to make 200mL of a 20mM stock solution. How many nanograms of compound are there in 200mL?
500000000
How many nL are there in 50L of solution?
50000000000
How many ug of solute are there in 200 mL of a 0.025 g/L solution?
5000ug
You are provided with a 8mg/mL solution of drug Z. The molecular weight of of drug Z is 160. What is the mM concentration of the drug Z in solution?
50mM
Saline is a 0.9% (w/v) solution of NaCl. How many grams of NaCl do you need to dissolve in water to make 6L of saline?
54g
An enyzme assay has a final volume of 0.32mL. Each assay contains 80μL of phosphate buffer. How many assays can you carry out if you have 7.2mL of phosphate buffer?
90 assays
The molecular weight of glucose is 180. If the concentration of glucose in blood is 5 mM how many nanograms of glucose are there in 100 mL of blood?
90000000
How many grams are there in 6.0L of 15%(w/v) solution?
900g
How many grams are in 150mL of a 60% (w/v) solution?
90g
What is the largest volume? A) 3390mL B) 3.35L C) 3.34x10^3mL
A
You have a 3.5M solution of drug in water and need to dilute it to 50mM solution. What volume of drug and what volume of water must you add to obtain 0.35mL of 50mM solution?
0.005ml drug + 0.345ml water
What is 7x10^4 ng/mL expressed as g/L?
0.07
You have a 5.2M solution of drug in water. If you carry out a dilution adding 1 part of drug to 39 parts water what final concentration of drug will you have?
0.13
What volume of a 2.4M buffer must be added to an assay whose final volume is 12mL to achieve a final concentration of 0.03M?
0.15mL
What volume of 2.5M buffer must be added to an assay whose final volume is 5mL to achieve a final buffer concentration of 0.05M?
0.1mL
What volume of a 3M buffer must be added to an assay whose final volume is 5mL to achieve a final concentration of 0.06M?
0.1mL
You have a 1.5 M solution of drug in water and need to dilute it to 60 mM solution. What volume of drug and what volume of water must you add to obtain 2.5 mL of 60 mM solution?
0.1ml drug and 2.4ml water
You have 8.4M solution of a drug in water. If you carry out a dilution adding 1 part of drug to 30 parts water what final concentration of drug will you have?
0.21M
The atomic mass of carbon is 12 The atomic mass of chlorine is 35.5 How much does 0.002 moles of carbon tetrachloride (CCl4) weight?
0.308g
You have a 6M solution of drug in water. If you carry out a dilution adding 1 part of drug to 19 parts of water what final concentration of drug will you have?
0.3M
What volume of 2.5M buffer must be added to an assay whose final volume is 5mL to achieve a final buffer concentration of 0.15M?
0.3mL
What volume of a 2.4M buffer must be added to an assay whose final volume is 12mL to achieve a final concentration of 0.06M?
0.3mL
You have a 4.8 M solution of a drug in water. If you carry out a dilution adding 1 part of drug to 11 parts water what final concentration of drug will you have?
0.4M (400mM)
You have stock solutions of 2M buffer, 1M substrate, 10 units/mL enzyme, what volumes of buffer, substrate, enzyme and water msut you add in a 10mL assay to get final concentrtations of 0.1M buffer, 20m substrate, and 1 unit/mL of enyzme?
0.5mL buffer, 0.2mL substrate, 1mL enzyme
What is 6x10^3 ng/ml expressed as g/L?
0.6
The molecular weight of compound X is 130. You have given a 0.05M solution of compound X. What is the % (w/v) concentration of this solution?
0.65%
What is 9x10^5 ng/mL expressed as g/L?
0.9g/L
The molecular weight of glucose is 180. If the concentration of glucose in blood is 5mM how many grams of glucose are there in 2L of blood?
1.8g
How many ug of solute are there in 250mL of a 0.4g/L solution?
100000g
The molecular weight of sodium fluoride is 42. How many grams of NaF must be dissolved in 10L of water to give a 0.25M solution?
105g
Saline is a 0.9%(w/v) solution of NaCl. How many grams of NaCl do you need to dissolve in water to make 12L of saline?
108g
How many μg of solute are there in 200mL of a 0.5g/L solution?
10^5 μg
The molecular weight of NaOH is 40. How many grams of NaOH must be dissolved in 2.5L of water to give a 0.1M solution?
10g
The molecular weight of drug A is 250. How many grams of drug A are there in 200mL of a 0.2M solution?
10g
The atomic weight of potassium is 39, oxyigen is 17 and hydrogen is 1. How much does 0.2 moles of potassium hydroxide (KOH) weigh?
11.2g
How many nL are there in 120L of solution?
120000000000
The molecular weight of Na2HPO4 is 150. How many grams of Na2HPO4 must be dissolved in 4L of water to give a 0.2M solution?
120g
The atomic weight of sodium is 23. The atomic weight of oxygen is 16. The atomic weight of hydrogen is 1. How much does 0.3 moles of sodium hydroxide (NaOH) weigh)?
12g
Saline is a 0.9% (w/b) solution of NaCl. How many grams of Na Cl do you need to dissolve in water to make 15L of saline?
135g
The molecular weight of compound X is 620. You are given a 0.25M solution of compound X. What is the % (w/v) concentration of this solution?
15.5%
What is 15x10^6 ng/ml expressed as g/L?
15g/L
You have a 28 % (w/v) solution of drug in water and need to dilute it to a 4 % (w/v) solution. What volume of drug solution and what volume of water must you add to obtain 105 mL of a 4 % solution?
15mL drug and 90mL water
The molecular weight of CaCl2 is 110. How many grams of CaCl2 must be dissolved in 3L of water to give a 0.05M solution?
16.5g
How many grams are in 450mL of a 36% (w/v) solution?
162
How many grams are in 550mL of a 30% solution?
165g
The atomic weight of sodium is 23. The atomic weight of oxygen is 16. The atomic weight of hydrogen is 1. How much does 0.4 moles of sodium hydroxide (NaOH) weigh)?
16g
You are provided with a 150ug/ul solution of drug B. The molecular weight of drug B is 30. What si the M concentration of the drug B solution?
5M
The stock solution of SDS is 10% (w/v). How much SDS and water do you need to add together to get 20mL of a 2.5% solution?
5ml stock and 15ml water
The molecular weight of glucose is 180. If the concentration of glucose in blood is 5mM how many grams of glucose are there in 7L of blood?
6.3g
An enzme contains 400µL of Tris HCl buffer. How many assays can you carry out if you have 24mL of Tris HCl buffer?
60
An enzyme assay has a final volume of 0.25mL. Each assay contains 120 uL of phosphate buffer. How many assays can you carry out if you have 7.2mL of phosphate buffer?
60
How many µg of solute are there in 200mL of a 0.3g/L solution?
60000µg
How many grams are in 3.75L of a 16% (w/v) solution?
600g
The molecular weight of Na2HPO4 is 150. How many grams of Na2HPO4 must be dissolved in 2L of water to give a 0.2M solution?
60g
The molecular weigt of Drug X is 660. How many grams of Drug X are there in 200mL of a 0.5M solution?
66g
Saline of a 0.9% (w/v) solution of NaCl. How many grams of NaCl do you need to dissolve in water to make 7.5L of saline?
67.5g
The atomic mass of sulfur is 32. The atomic mass of oxygen is 16. The atomic mass of chlorine is 35. How much does 0.5 moles of sulfuryl chloride (SO2CL2) weight?
67g
You are provided with a 6mg/mL solution of drug Z. The molecular weight of drug Z is 120. What is the mM concentration of the drug Z in solution?
6g/L or 50mM
You are asked to make up 600mL of 0.02M solution of drug X. You are provided with a 2M stock solution. What volume of stock solution and what volume of water must you add to obtain 600mL of 0.02M of drug X?
6mL stock and 594mL H2O
An enzyme assay has a final volume of 0.65mL. Each assay contains 90μL of phosphate buffer. How many assays can you carry out if you have 6.3mL of phosphate buffer?
70 assays
How many micrograms are in 5L of a 15 % (w/v) solution?
750000000
9x103 x 9x10-4 = ?
8.1
The molecular weight of CaCl2 is 110. How many grams must be dissolved in 3L of water to give a 0.025M solution?
8.25g
How many grams are there in 4.5L of 18% (w/v) solution?
810g
How many grams of NaCl do you need to dissolve in water to make 5.5 L of 15 % (w/v) saline solution?
825g
What is 8x10^6 ng/mL expressed as g/L?
8g/L
Which is the largest volume? A) 4839mL B) 4.81L C) 4.84x10^2mL
A)
Which is the largest volume? A) 5.37L B) 5374mL C) 5.37x10^2mL
B)
Which is the largest volume? A) 7.23L B) 7.23x10^2mL C) 7239mL
C)
You are provided with a 125ug/ul of drug B. The molecular weight of drug B is 25. What is the M concentration of the drug B solution?
M
