Which group of measurements is the most precise? (each group of measurements is for a different objects?
A)2g, 2.5g, 3g
B)1g, 3g, 5g,
C)2.0g, 3.0g, 4.0g
D)2g, 3g, 4g
A)2g, 2.5g, 3g
100
In the measurement 0.503L which digit is the estimated digit?
3
100
what is the volume of a salt crystal 2.44*10^-2m by 1.4*10^-3m by 8.4*10^-3
2.9*10^-7 m^3
100
what is the VOLUME of a 80.0g of ether if denisty of ether is 0.70g/mL?
1.1*10^2 mL
200
How many significant figures are in the measurement 0.0034 kg?
two (2)
200
The closeness of measurement to its true value is a measure of its ________?
A) Accuracy
B) Precision
C)reproducible
D) usefulness
A) Accuracy
200
Which of the following is expressed to three significant digits?
A)0.007 m
B) 7077mg
C) 7.30 * 10^-7 Km
D) 0.070 mm
C) 7.30 * 10^-7 Km
200
What is the boiling point of water in celcius?
100 degrees celcius
200
What is the density of an object having a mass of 80.0g and volume of 25cm^3
0.32 g/cm^3
300
Round this 111.009 mm to four(4) significant digits.
111.0mm
300
What is Precision?
How close you are relative to the other results.
300
Which of the following measurements contains 2 sig figs?
A>0.000400L
B>0.00404L
C>0.00044L
D>0.00440L
C>0.00044L
300
the actual temperature is 7.5 K but I measured it as 7.8K so the error is ______?
4 %
300
express 5008 km in scientific notation
5.008*10^3 km
400
Express the sum of 1111 km and 222 km using the correct number of significant digits:
1333 km
400
What is accuracy?
How close you are to the known correct result or answer.
400
what is the sum of 7.068 m and 5.0 m? use correct SIG FIGS
12.7
400
% Error =
What is error/accepted value x 100
or experimental-accepted/accepted x 100
400
What is the volume of 45.6g of silver if the density of silver is 10.5 g/mL?
4.34 mL
500
What is the result of multiplying 2.5*10^10 by 3.5*10^-7?
8.75*10^3
500
Which number is most accurate?
A) 2.0000
B) 2.000
C) 2.00
D) 2.0
E) 2