chemistry measurement
57 mL = ______ L
0.057
1cm³ = ___ mL
1
How many significant digits area in the number 0.009?
1
Multiply the following three numbers and report your answer to the correct number of significant figures: 0.020 cm x 50 cm x 11.1 cm
1 x 10 cm³
2 cm = ______mm
20
The speed of light in a vacuum is exactly 299,792,458 meters per second. Write this number in scientific notation with the coefficient rounded to the hundredths place.
3.00 × 10⁸
Find the sum of 23.6 liters, 4.75 liters, 12.065 liters, and 9.11 liters using the correct precision.
49.5 L
67.2 m = ______ cm
6,720
7,939 mg = ______ g
7.939
A problem solving method scientists use to convert units of measurement. Uses equivalence statements as ratios and cross out units.
Dimensional Analysis
density formula
density = mass/volume
water's density?
1.00g/mL
1 m = __ centi meter
10^2
1 kilo meter=__m
10^3
1 meter=__ milli meter
10^3
1 mega meter= __ m
10^6
1 meter = __ micro meter
10^6
1 giga meter=__ m
10^9
1 meter= __ nano meters
10^9
3.5 g = ______mg
3,500
Write 3,465 in scientific notation.
3.465×10³
2.4+1.313=?
3.7
How many significant digits are in the number 0.000005721?
4
Write 45,870,320 in scientific notation.
4.587032 × 10⁷
Divide the following numbers and report your answer to the correct number of significant figures: 0.530 g / 0.1010 mL = ?
5.25 g/mL
Which symbol makes the following statement true? 7,500 ______ 7.5 × 10³
=
Which symbol makes the following statement true? 568 ______ 5.1 × 10²
>
1m=10²cm. Unit prefix meaning one hundredth. Symbol = c
Centi
An equivalence statement written as a ratio: 1inch/2.54cm or 2.54cm/inch
Conversion Factor
D=M/V. The ratio between mass and volume.
Density
system used in the US
English system
2 statements with different units that are equal. Ex: 1 inch = 2.54 cm
Equivalence statement
10⁹m= 1Gm. Unit prefix meaning one billion. Symbol = G
Giga
K = C + 273.15. A temperature scale with zero degrees K defined as absolute zero (no molecular movement)
Kelvin Scale
10³m=1 km. Unit prefix meaning one thousand. Symbol = k
Kilo
The amount of matter in an object. SI unit = kg
Mass
10⁶m=1 Mm. Unit prefix meaning one million. Symbol = M
Mega
1m=10⁶µm. Unit prefix meaning one millionth. Symbol = µ
Micro
1m=10³mm. Unit prefix meaning one thousandth. Symbol = m
Milli
1m=10⁹nm. Unit prefix meaning one billionth. Symbol = n
Nano
Reducing the digits in a number while trying to keep its value similar.
Rounding off
System of units of measurements that is widely used all over the world. There are only four units that we covered in depth: Mass (kg), length (m), volume m³, temperature (k)
SI units
Way of writing very small or very large numbers. Consists of a coefficient, base ten and an exponent. Ex: 2.5 x 10³
Scientific notation
All certain digit and one estimated digit.
Significant figures
The amount of space that a substance or object occupies. SI = m³
Volume
rule for # of sig figs in addition/subtraction
answer can go as many decimal places as the number with the fewest decimal places
rule for # of sig figs for division
answer should have as many sig figs as the number with the fewest sig figs
rule for sig figs for multiplication ex) 1.4 x 2.404
answer should have as many sig figs as the number with the fewest sig figs
conversion between fahrenheit and celcius
f= 1.8c + 32
SI stands for
international system
conversion between celsius (C) and Kelvin (K)
k= c+273
A measurement system based on the number 10 which uses prefix to make the unit larger or smaller than the base.
metric system
the ratio of the density of a given liquid to the density of water at 4 degrees C
specific gravity
part of measurement that tells us which scale or standard is being used to represent the results of the measurement
unit
A particular amount (g, L, km)
units
3 apples has how many significant figures?
unlimited
1 cm^3=1mL=1 g for which substance only?
water
