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1.18 unit test the study of chemistry part 1

18/10/2021 Client: muhammad11 Deadline: 2 Day

Chem Unit 1.18 Questions

Name:

Date:

Graded Assignment

Unit Test, Part 2

Answer the questions below. When you are finished, submit this assignment to your teacher by the due date for full credit.

(10 points)

Score

1. The data in the table below represents the pressure of a gas as the temperature changes. Plot a graph of the data, using the blank graph provided below. Draw a trend line and calculate its slope. How are the variables related? What will the pressure of the gas be at 0°C?

image3.emf Pressure of Gas with Changes of Temperature

Answer:

image1.png

(5 points)

Score

2. You have 2 m3 of a mineral ore sample. It has a mass of 1 × 104 kg. Calculate the density of the ore sample and express your results in g/cm3 with appropriate scientific notation.

Answer:

(5 points)

Score

3. Stacy reads that a 50:50 mixture of methanol and water is best for keeping a car’s radiator from freezing when the temperature goes down to –40°C. Design an experiment to test this finding. You have a –40°C freezer, water, methanol, graduated cylinders to measure volume, several plastic beakers, and a watch at your disposal. Be sure to state your hypothesis, procedure, and any controls in your experiment. What are the dependent and independent variables? Explain the possible results if your hypothesis is true.

(Note: Car antifreeze is a mixture of water and another substance, commonly methanol, ethylene glycol, or another low freezing point liquid.)

Answer:

Your Score

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