Chapter 1 Flashcards
What is the SI unit for length?
meter (m)
What is the SI unit for mass?
gram (g)
What is the SI unit for temperature?
Kelvin
What is the SI unit for time?
seconds (s, sec)
What is the SI unit for amount of substance?
mole (mol)
What is the SI unit for volume?
cubic centimeter or liter (l)
How many centimeters are there in a meter?
One meter is 100 centimeters.
How many grams are there in a kilogram?
One kilogram is 1,000 grams.
What is the formula to convert a temperature from Celsius to Kelvin?
K = degree Celsius + 273.15
What is the formula to convert a temperature from Fahrenheit to Celsius?
°C = (°F - 32) × 5/9
How do you convert a temperature from Fahrenheit to Kelvin?
Convert to Celsius first.
How do you calculate moles?
moles = mass / molar mass
How many milliliters in a liter?
One liter is 1,000 milliliters.
What does the prefix milli mean?
A thousand.
What does the prefix centi mean?
One hundred.
What does the prefix kilo mean?
One thousand.
What is a significant figure?
All digits of a measured quantity, including the uncertain ones.
Which digits are significant?
All nonzero digits are significant.
Which zeroes are significant?
Zeroes between nonzero digits are significant.
Which zeroes aren’t significant?
Zeroes at the beginning of a number are never significant.
Which zeroes are significant if it contains a decimal point?
Zeroes at the end of a number are significant if it contains a decimal point.
Which measurement limits the number of significant figures in the answer?
The least certain measurement limits the number of significant figures in the answer.
In addition or subtraction, where is the answer rounded to?
When addition or subtraction is performed, answers are rounded to the least significant decimal place.
In multiplication, where are the answers rounded to?
When multiplication or division is performed, answers are rounded to the same number of digits as the measurement with the fewest number of significant figures.
