Honors Chem - Unit 1 Test Review Questions - Intro to Chem

Sep 30, 2026

Honors Chemistry Unit 1 test review questions covering scientific notation, exponent calculations, and significant figures. The worksheet includes standard form conversion and calculator-based exponent problems, then practices identifying and applying significant figures in multi-step calculations. Measurement sections address estimation vs certainty using a ruler and compare precision between different grad cylinders. It also reviews simplifying expressions, solving for variables, SI prefixes and base units, unit conversions, and basic chemical reactions including reactants, products, mass relationships, and atomic behavior.

LanguageEnglish

CategoryExam

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Honors Chem: Unit 1 Test Review Questions (Intro to Chem)

Scientific Notation

Significant Figures

Measurement

Math Review

SI System

Conversions

Basics of Chemistry

Name: Hour: Date: Honors Chem: Unit 1 Test Review Questions (Intro to Chem) Directions: Complete the following questions using your notes and previous homework to help. Show all your work and include units, when necessary. Write in complete sentences, when necessary. Scientific Notation 1. Express in standard form. Express in scientific notation. a. 5.2 x 103 d. 780000 b. 9.65 x 10-4 e. 0.00000422 c. 8.5 x 10-2 f. 10000000 2. Use the exponent function on your calculator to compute the following, rounding your answer to correct SF. a. (4 .1 x 1023) (8 .0 x 103) e. (3 .2 x 104) / (6 .8 x 103) b. (3 .6 x 104) (13) f. (4 .6 x 103) / (9 .8) c. (4 .0 x 10-3) (145) g. (298) / (2 .7 x 10-2) d. (7 .9 x 105) (3 .1 x 10-8) h. (5 .6 x 10-9) / (3 .3 x 106) Significant Figures 3. Identify the correct number of significant figures in the examples below. a. 0.000541 d. 0.01020 g. 2839.17 b. 500.0 e. 062709 h. 0.05493 c. 80475.050 f. 50140 i. 60500.00 4. Use your math rules to complete the following problems with correct SF. a. (7 .5 x 103 cm3)(1 .9 x 102 kPa)(6 .21 x 102 kPa) (29.2 􀀐 21.0)(5 .26􀁵105 ) b. 0.579 Measurement 􀀹 Certainty vs. Estimation: Use a ruler to measure this piece of paper in the following units: cm and mm. To what place can we reasonably estimate? Why? 􀀹 Comparing precision of instrumentation Will I get more precision using a 100 mL or a 500 mL grad cylinder? Why? Math Review 5. Simplify 250 J (4 .0 g) 7. Solve for X X – 15 = J 17oC 6. Simplify… (10a + 15a) (a3b) 8. Solve for X… PX = NRT SI System 􀀹 Prefixes: kilo, deci, centi, milli (Memorize!) What does “milli” mean? 􀀹 Base Units: Vol Length Mass Temp Conversions 1. Convert 168 mL into cm3. 2. Convert 58.3 mm into km. 3. After returning from a lovely trip to Europe, you find that a couple of posters you purchased have dimensions provided in metric. The dimensions are: 1.40 m x 1.00 m. Approximately what size frame will you need for your poster in inches? (1 in = 2.54 cm) What is the area of this poster in cm2? Basics of Chemistry In the chemical reaction 2 Al (s) + Fe2O3 (s) 􀃆 2 Fe (s) + Al2O3 (s) a. What are the reactants? What are the products? b. What is the relationship between the combined mass of the reactants and the combined mass of the products? c. In general, what happens to atoms during a chemical reaction?

FAQs

How do you express numbers in standard form and scientific notation in this review?

The review asks for each value to be rewritten in standard form and scientific notation, focusing on correct powers of 10. It includes examples such as 5.2 × 10^3 and 9.65 × 10^-4.

What are significant figures and how are they tested here?

The worksheet includes identifying the correct number of significant figures and then using math rules to compute problems with the right significant-figure rounding. It includes both decimals and numbers with zeros.

What does the chemistry section ask about chemical reactions?

It provides a reaction equation and asks for the reactants and products, the relationship between total reactant mass and total product mass, and what happens to atoms during a chemical reaction.

Sep 30, 2026

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