Chem Exam 1 Measurement, Units & Metric System
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21 Terms
What is the SI unit for length?
Meter (m).
What is the SI unit for mass?
Kilogram (kg).
What is the SI unit for time?
Second (s).
What is the SI unit for temperature?
Kelvin (K).
What is the SI unit for amount of substance?
Mole (mol).
What is the common chemistry unit for volume?
Liter (L) or milliliter (mL).
How many mL are in 1 L?
1000 mL.
How many cm³ are in 1 mL?
1 cm³ = 1 mL.
What does kilo- mean?
10³.
What does centi- mean?
10⁻².
What does milli- mean?
10⁻³.
What does micro- mean?
10⁻⁶.
What does nano- mean?
10⁻⁹.
What is density?
Mass per unit volume.
What is the density formula?
D = m/V.
How do you find mass using density?
m = D × V.
How do you find volume using density?
V = m/D.
What is accuracy?
How close a measurement is to the true value.
What is precision?
How close repeated measurements are to each other.
What is systematic error?
An error that consistently shifts measurements in one direction.
What is random error?
An unpredictable variation between measurements.