# cueFlash

## Glossary of Chemistry Chapter 1 and 2 Flashcards 2

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Temperature
Measures thermal energy the Kelvin scale is the absolute scale, we can never reach 0 degrees Kelvin.
Fahrenheit
F=9/5 C + 32
Celcius
C = 5/9 (F - 32)
Kelvin
C = K - 273
K = C + 273
What is 10 C in Fahrenheit
EX 9/5*10/1 =90/5 =18+32=50
What is 40 F in C?
5/9 (40 - 32)=5/9 (8)40/9= 4.44 C.
What is 70 C in K.
K = 70 + 273 = 343 K
What is 100 F in K.
C = 5/9 (100-32) = 37.8
37.8 + 273 = 310.8 K
Density
Density measures the compactness of matter. The more compact the bigger the density value is.
Density formula
D = m/V.
What is the density of sodium chloride 10 cm cubed has a mass of 21.64 g?
21.64/10 = 2.164 g/cm cubed
Finding mass using density and volume.
M = D * V
Finding Volume using mass and Density
V = m/D
What is the volume of 54g of Al if its density is 2.7 g/mL
?
V = 54/2.7 = 20 mL
V = m / D
Densities of substances are affected by temperature and pressure -(for gases)
DH2O (5C) ≠ DH2O (80C)
Percent error
% error = measure value - actual - actual value / actual value * 100
A ball has an actual mass of 4.00 g, you measure it to be 4.05 g. What is your percent error?
4.05 - 4.00/4.00 *100 = 1.25%