Calculations

Question 1

English units of measurement

Answer 1

Inch, foot yard

pound

cup, pint, quart gallon

Question 2

Metric Units of Measurement

Answer 2

Meter, Gram Liter

Question 3

SI units of measurement

Answer 3

meter, kilogram, second, mole, kelvin, ampere, candela

Question 4

10^-15

Answer 4

Femto

Question 5

10^-12

Answer 5

Pico

Question 6

10^-9

Answer 6

Nano

Question 7

10^-6

Answer 7

Micro

Question 8

10^-3

Answer 8

Milli

Question 9

10^-2

Answer 9

Centi

Question 10

10^-1

Answer 10

Deci

Question 11

10^1

Answer 11

Deka

Question 12

10^2

Answer 12

Hecto

Question 13

10^3

Answer 13

Kilo

Question 14

10^6

Answer 14

Mega

Question 15

10^9

Answer 15

Giga

Question 16

Calculate Celsius from Fahrenheit

Answer 16

C = 5/9 (F-32)

Question 17

Calculate Fahrenheit from Celsius

Answer 17

F = [9/5 C] + 32

Question 18

Calculate Kelvin

Answer 18

K = C + 273

Question 19

What is a serial dilution?

Answer 19

multiple progressive dilutions

dilution factor is constant

geometric decrease in concentration in logarithmic fashion

Question 20

What are percent solutions?

Answer 20

weight/weight

weight/volume

volume/volume

Question 21

Make 100g of a 5% (w/w) solution of HCl using 12M HCl

Answer 21

5 g/100 g x 100 g = 5 g HCl

Question 22

Make 1,000 mL of a 10% (w/v) solution of NaOH

Answer 22

10 g/100 mL x 1000 mL = 100 g NaOH

Question 23

Make 50 mL of a 2% (v/v) solution of HCl

Answer 23

2 mL/ 100 mL x 50 mL = 1 mL of HCl

Question 24

What is molarity

Answer 24

M = Moles/liter

1 mole = gram molecular weight (GMW)

M = GMW/L

Question 25

If solution contains 40 g NaOH per liter what is molarity?

Answer 25

40g NaOH / L

1 mole NaOH : 23 (NA) + 16 (O) + 1 (H) = 40 GMW

1 mole/40g

40 g / L x 1 mole / 40 g = 1 mole / L = 1M

Question 26

What is Normality

Answer 26

N = equivalents / Liter

1 equivalent = GMW / Valence

Valence = number of units that can combine with H

N = Molarity x Valence

Question 27

If 60 g of NaOH is dissolved in 1 L of water what is the normality

Answer 27

1 equivalent = 40 GMW / 1 Valence

1 equivalent = 40 GMW

60 g / L x 1 eq / 40g = 1 Eq = 1.5N

Question 28

Osmolality formula

Answer 28

osmolality = mOsmo / kilogram

1.86 (Na) + GLU/18 + BUN/2.8

Question 29

RCF calculation

Answer 29

RCF = 1.118 x 10 e-5 x r x rpm^2

r = radius in cm

Question 30

heat block/water bath temperature

Answer 30

36-38 C

Question 31

Room temperature

Answer 31

20-24 C

Question 32

Laboratory Refrigerator Temperature

Answer 32

2-8C

Question 33

Blood Bank Refrigerator

Answer 33

1-6C

Question 34

Laboratory Freezer Temperature

Answer 34

-18C

Question 35

Blood Bank Freezer Temperature

Answer 35

-65C