Chem 305 PSS
Non significant figures are obtained with a _____.
calculator
a common metric unit of length.
centimeter, cm
How many sig figs in the following? 0.11 0.011 110
each has 2
A number written as a superscript indicating that a value is multiplied by itself is called an _______.
exponent
a number written as a superscript that indicates a value is multiplied by itself.
exponent
a common metric unit of mass.
gram, g
A measurement is obtained using an _______.
instrument
a device for recording or measurement such as length, mass, or volume
instrument
When determining significant figures read from _____ to _____?
left to right
The amount of matter an object has is its?
mass
the quantity of matter in an object.
mass
a numerical value and unit that express length, mass or volume.
measurement
a common metric unit of volume
milliliter, ml
When adding or subtracting a number the answer is limited by the measurement having the _____ uncertainty?
most
Are placeholders counted in significant figures?
no
When determining significant figures read from left to right starting with the first ________?
non zero
the digits in a measurement that exceed the instrumental measurement.
nonsignificant digits
a positive or negative exponent of 10.
power of 10
the process of eliminating digits that are not significant.
rounding off
a method for expressing numbers by moving the decimal place after the first significant digit and indicating the number of decimal moves by power of 10.
scientific notation.
The _______ in a measurement are those digits known with certainty, plus one digit that is estimated.
significant digits
the certain digits in a measurement plus one estimated digit.
significant digits
What are exact numbers in reference to significant figures?
they are NOT measurements. They are exacts 6 test tubes, 1 meter = 100 cm
Which term refers to the degree of inexactness in a measurement?
uncertainty
the degree of inexactness in an instrumental measurement.
uncertainty
When multiplying or dividing the answer is limited by the ________.
value with the fewest significant figures
The amount of space occupied by a solid, gas or liquid is its ______?
volume
How many significant digits are in the exact number 155?
None, sig fig rules don't apply
Are all numbers in a measurement, except placeholders, significant?
Yes
