Unit 2 Review (Chemistry I)

How close a set of measurements are to each other...

• accuracy

• precision

• % error

• luminous intensity

How close a measurement is to the accepted value...

• accuracy

• precision

• electric current

• adaptability

Which of the following would best describe a situation where all measurements of a 1 gram object were off by exactly 15 grams?

• high accuracy, high precision

• low accuracy, high precision

• high accuracy, low precision

• low accuracy, low precision

SI base unit for electric current:

• candela

• kilogram

• ampere

• mole

What quantity is measured by the mole?

• electric current

• luminous intensity

• mass

• amount of substance

SI base unit for mass:

• gram

• kilogram

• pound

• newton

Tags

NGSS.MS-PS2-4

A substance has a mass of 400 grams and a volume of 100 mL. What is the density in g/mL?

• 40000

• .25

• 4

• 40

In the density triangle, which variable goes on top (of the triangle)?

• volume

• density

• mass

• area

What can be calculated by comparing the accuracy of an experimental measurement to the accepted value?

• percent composition

• percent error

• percent daily value

• percent by mass

How many significant digits: 405 m

• 1

• 2

• 3

• 4