1
__________ is the study of matter and the changes it undergoes.
Chemistry
What is the correct representation of 702.0g in scientific notation?
a. 7.020x102 b. 7.02x103
c. 70.20x102 d. 70.20x101
a. 7.020x102
How many significant figures are there in a distance measurement of 20.070 km?
A) 2
B) 3
C) 4
D) 5
Convert 86oC to Fahrenheit.
186.8oF
What is the formula to find error?
Error = experimental value - accepted value
research that is undertaken to solve a specific problem
applied research
(6.23 × 106 kL) + (5.34 × 106 kL)
1.157x107
Round the answer for the problem to the correct number of significant figures.
4.35 dm × 2.34 dm × 7.35 dm
74.8 dm
the amount of mass per unit volume
density
_________________ expresses any number as a number between 1 and 10 (known as a coefficient) multiplied by 10 raised to a power (known as an exponent).
Scientific Notation
the number of all known digits reported in measurements plus one estimated digit
significant figures
(4.68 × 10–5 cg) + (3.5 × 10–6 cg)
5.03x10-5
Round the answer for the problem to the correct number of significant figures.
4.78 cm + 3.218 cm + 5.82 cm
13.82 cm
An object with a mass of 7.5 g raises the level of water in a graduated cylinder from 25.1 mL to 30.1 mL. What is the density of the object?
1.5g/ml
a testable explanation of a situation of phenomena
hypothesis
a unit defined by a combination of base units
derived unit
(8.42 × 108 kL) ÷ (4.21 × 103 kL)
2x105
Round the answer for the problem to the correct number of significant figures.
38,736 km ÷ 4784 km
8.097 km
Convert 253K to degrees Fahrenheit.
-4oF
(3.57 × 102 mL) – (1.43 × 102 mL)
2.14x102
___________ is a measure that reflects the amount of matter in a given sample. It differs from ___________ which takes into account not only the amount of matter present, but also the Earth's gravitational pull on matter.
Mass, Weight
(3.33 × 10–4 m) × (3.00 × 10–5 m)
9.99x10-9
(8.4 × 106 L) ÷ (2.4 × 10–3 L)
3.5x109
(4.8 × 105 km) × (2.0 × 103 km)
9.6x108
(9.87 × 104 g) – (6.2 × 103 g)
9.25x104