Chemistry A Unit 1 Test

Perform the indicated calculation. You may use a calculator. Remember to round your answers according to the rules for significant figures. 84000 kg/425 L

198 kg/l

Lisa's Chemistry class was performing an experiment with gas pressures. They filled a container with gas at a pressure of 101,000 Pa at room temperature. When they doubled the temperature, the pressure also doubled. What was the new pressure in scientific notation?

2.02 x 10'5 pa

Perform the indicated calculation. You may use a calculator. Remember to round your answers according to the rules for significant figures. 732cm x 5.0cm

3700 cm'2

Perform the indicated calculation. You may use a calculator. Remember to round your answers according to the rules for significant figures. 374 L - 0.550 L

373 L

Perform the indicated calculation. You may use a calculator. Remember to round your answers according to the rules for significant figures. 5664.2 cm + 238cm

5902 cm

Complete the following Table of Standard Measurements and SI units. Definition Measurement Base unit amount of matter contained in an object __________ kilogram length of events and the duration of the interval between two events ____________ second average kinetic energy of the particles of a substance temperature ___________ number of units, such as atoms, molecules, or ions, of which all matter is made particles of matter ___________ the flow of electrons passing a particular location in a given point of time electric current ________ amount of brightness of a light source luminous intensity _______

mass time kelvin mole ampere candela

___ are occurrences observable in nature.

phenomena

How close a series of measurements are to each other is ___.

precision

________facts or pieces of information that can be expressed as an amount or a quantity ________facts or pieces of information that can be observed by the senses ______something that can change or be changed ______a standard used for comparison ______a visual, verbal, or mathematical representation designed to explain a natural phenomenon ______an orderly method for observing nature and making predictions _______a possible explanation for an observation, phenomenon, or scientific problem that can be tested through experimentation an organized procedure for conducting a _______controlled, measurable, and repeatable test or investigation _______a hypothesis that has been confirmed many times by experimental data with no exceptions _______a simple, factual, and precise statement that describes an action or set of actions

quantitative data qualitative data variable control scientific model scientific method hypothesis experiment scientific theory scientific law

All the known digits in a measurement, plus one estimated last digit, are ___ figures.

significant

Devices used to extend the senses or to make observations safer are called ___.

tools

The definition of derived unit is:

unit formed when other units are combined

How close a measurement is to its true value is its ___.

accuracy

What is the name for a unit that is selected to be standard for a certain type of measurement?

base

The measure of distance is called _____ and its SI base unit of measurement is the meter.

length

Brandon works part-time at a coffee shop. A group of 12 people ordered lattes. Each 12 oz latte contains 8 oz of milk. He has only 2.5 L of milk left. How many liters of milk will he need and will he have enough? ( 1 L = 33.8oz)

He will need 2.84 L, so he is short 0.34 L.