WorksheetsBiotechnology 3.3 HW
Total questions: 20
Worksheet time: 10mins
What happens to the ratio of solute molecules to solvent as a solution becomes more concentrated?
The ratio decreases
The ratio increases
The ratio remains the same
The ratio fluctuates
Which of the following are concentration units?
mM/hr
gr/mL
mM
°F/°C
What is the concentration of a protein solution if 10 g of protein is dissolved in 10 mL of solvent?
0.1 g/mL
1 g/mL
10 g/mL
100 g/mL
What is the Mass/Volume Concentration Equation used for?
To determine the mass of solute in a given volume of solution
To determine the volume of solvent needed for a given mass of solute
To determine the concentration of a solution
To determine the temperature of a solution
How many grams of hemoglobin are needed to make 100 mL of a 0.05 g/mL hemoglobin solution?
5 g
0.5 g
50 g
0.05 g
If you need to make 100 mL of a 50 µg/mL hemoglobin solution, how many grams of hemoglobin are required?
0.005 g
0.05 g
0.5 g
5 g
What is the correct conversion factor from micrograms (µg) to milligrams (mg)?
1 mg = 1000 µg
1 mg = 100 µg
1 mg = 10 µg
1 mg = 0.1 µg
What does the term "percent" represent in the context of making solutions?
A proportion of something out of 100 parts
A proportion of something out of 10 parts
A proportion of something out of 1000 parts
A proportion of something out of 50 parts
What is the decimal value of a 10% solution?
0.1
0.5
0.01
1.0
How many grams of solute are needed to make 500 mL of a 10% NaCl solution?
50 g
5 g
0.5 g
100 g
What is the percent value of a solution if the decimal value is 0.02?
2%
0.2%
20%
0.02%
How many grams of NaOH are needed to make 100 mL of a 2% NaOH solution?
2 g
0.2 g
20 g
0.02 g
If you have 15 grams of solute in a total of 100 mL of solution, what is the percent concentration?
15%
1.5%
0.15%
150%
What is the molecular weight of a molecule?
The sum of all the atomic weights of the atoms in a given molecule
The weight of a single atom in a molecule
The weight of a molecule in liters
The number of atoms in a molecule
How many molecules are there in a mole?
6 x 10^20
6 x 10^21
6 x 10^22
6 x 10^23
What is the molecular weight of NaCl?
23 amu
35.5 amu
58.5 amu
58 amu
What is the atomic mass of hydrogen?
1 amu
2 amu
1.5 amu
0.5 amu
What instrument is used to determine the molecular weight of a compound?
Mass spectrometer
Thermometer
Barometer
Hygrometer
How many grams of NaCl are needed to prepare 1 L of a 2 mol/L solution?
117 g
58.5 g
29.25 g
235 g
Which of the following are mass/volume concentration units? (Choose all that are correct.)
mg/mL
g/mg
L/mg
µg/µL
g/L
