Chem 170 chapter 1 Flashcards

1
Q

A chemist mixes sodium with water and witnesses a violent reaction between the metal and water, this is classified as…

a) observation
b) a law
c) a hypothesis
d) a theory

A

a) Observation

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2
Q

2 different elements attached to each other are called

A

A compound

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3
Q

A single element is called

A

a pure element

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4
Q

Gasoline evaporating is an example of

A

physical change

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5
Q

wood burning is an example of

A

chemical change

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6
Q

convert 85 degrees F to Kelvin

A

302.6 K
f-32/1.8 = C
C + 273.5 = K

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7
Q

33.2x10^-4 m to mm

A

33.2mm

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8
Q
Match the values
mega (M) = ?
Kilo (K) = ?
deka (da) = ?
deci (d) = ?
centi (c) = ?
milli (m) = ?
micro (u) = ?
nana (n) = ?
pico (p) = ?
A
mega (M) = 10^6
Kilo (K) = 10^3
deka (da) = 10^1
deci (d) = 10^-1
centi (c) = 10^-2
milli (m) = 10^-3
micro (u) = 10^-6
nana (n) = 10^-9
pico (p) = 10^-12
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9
Q

What is the mass of 1.75 L sample of liquid that has a density of 0.921 g/ml

A

1.61 x10^3g

Mass = Density * Volume

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10
Q

sigfig rules

A

Rule 1: Non-zero digits are always significant.
Rule 2: Any zeros between two significant digits are significant.
Rule 3: A final zero or trailing zeros in the decimal portion ONLY are significant.

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11
Q

Exact numbers are

A

Whole numbers without decimals

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12
Q

1285 cm^2 to m^2

A

.1285m^2

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13
Q
1m = ? cm
1m^2 = ? cm^2
1m^3 = ? cm^3
A
1m = 100 cm
1m^2 = 10000 cm^2
1m^3 = 1000000 cm^3
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14
Q

Formulas for Mass, Density, and Volume
Mass = ?
Density = ?
Volume = ?

A
Mass = Density * Volume
Density = Mass / Volume
Volume = Mass / Density
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