Unit 1 Review

Complete the following metric facts 1 m = ______ cm 1 m = 100 cm _______ g = 1 kg 1000 g = 1 kg 1 hL = _____ L 1 hL = 100 L _________ µm = 1 m 1,000,000 µm = 1 m

How many sig figs are in the following measurements? 672 mL 3 10 g km m L g hL 5

Uncertainty Explain how you determine the uncertainty of a measuring instrument. +/- half the distance between the smallest markings

Uncertainty What is the uncertainty of this instrument? +/- 0.5 mL (the smallest mark is every mL)

What is the mass (with uncertainty)? Read the mass from the triple beam balance. Include uncertainty g +/ g Which is the uncertain digit? The 0

Accuracy & Precision Draw a picture for representing each

Accuracy & Precision Describe each scenario in terms of accuracy and precision (high or low for each).

How many centimeters are there in 1.23 x kilometers?

How many inches are there in 355 millimeters? (Fact: 1 inch= 2.54 cm)

How many miles are there in 3.44 x 108 inches? There are 0.61 miles in 1 km). (Fact: 1 inch= 2.54 cm) (Fact: 1 mile= 0.61 km)

Moles! List the three conversion factors you know about moles: 1 mol = 6.02 x particles (atoms, molecules, oranges) 1 mol = 22.4 L of gas (at Standard Temperature and Pressure) 1 mol = Mass in grams from the periodic table

When there are moles of candy canes how many candy canes are there?

If there are 9.6x10 15 particles of sugar in a solution then how many moles of sugar are there?

Perform each calculation and round to correct number of significant figures

Match the following Sand and water Carbon dioxide Salt water solution Copper wire Element Compound Homogeneous mixture Heterogeneous mixture

Mixture Separation Explain the difference between evaporation and distillation Evaporation lets you keep the solute (solid at room temperature), Distillation lets you keep a liquid

Mixture Separation What is one mixture (other than sand and salt water) that you could separate using Filtration?

Define Insoluble Can’t dissolve in water (will stay a solid, can be separated by filtration) Soluble Can dissolve in water (can be separated by evaporation) Solution Something that is dissolved in water (the mixture) Precipitate Newly formed solid (because of a chemical reaction, can be separated by filtration)

Use the data below Time on hot plate (s) Temperature of water (°C) Draw a good graph, include the following features: Axes labels and units A good title An appropriate scale Decide if the point (0, 0) makes sense as a data point Draw a best fit line Calculate the slope of the best fit line What are the units of the slope? What does the slope mean?