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Chemistry Grade 9: Traditional Market Measurement Methods

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Chemistry Grade 9: Traditional Market Measurement Methods

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Questions and Answers

What is the key to significance in experimental measurements?

Repetition (correct)

Accuracy

Precision

Estimation

How can an experimenter have confidence in the significance of measurements?

By relying on estimation

By increasing the number of measurements

By repeating measurements (correct)

By using complex instruments

What do significant figures in a number consist of?

Only certain digits

Certain digits and one doubtful digit (correct)

All possible digits in the number

All digits after the decimal point

Based on the text, what is the rule regarding the decimal places in an answer when adding or subtracting quantities?

No more decimal places than the least accurate measurement Signup and view all the answers

What is a desirable feature for the sides of a graduated cylinder according to the text?

Perfectly vertical Signup and view all the answers

How many significant figures are in the number 70.03?

Four Signup and view all the answers

Which of the following calculations involves the proper use of significant figures?

(18.09 + 7.0001) / (3.7 x 2.0005) Signup and view all the answers

What is the correct volume, with the correct number of significant figures, of a sample of nickel that weighs 7.5425 g and has a density of 8.8 g/cm3?

0.86 cm3 Signup and view all the answers

When multiplying and dividing quantities, what should be done to maintain proper significant figures?

Maintain the number of significant figures in the least precise measurement Signup and view all the answers

In the expression 0.01208 / 0.0236, up to how many decimal places should the answer be reported?

Three Signup and view all the answers