CHEMISTRY 120 EXAM 1 (CHAPTERS1, 2, AND INCLUDING ATOMIC WEIGHT) EXAM WITH CORRECT QUESTIONS AND ANSWERS 2025

CHEMISTRY 120 EXAM 1
(CHAPTERS1, 2, AND INCLUDING
ATOMIC WEIGHT) EXAM WITH
CORRECT QUESTIONS AND
ANSWERS 2025

 Chemistry - CORRECT-ANSWERSthe study of the composition, structure, properties,

and reactions of matter

 Matter - CORRECT-ANSWERSanything that has mass and occupies space

 Chemical - CORRECT-ANSWERSa substance that always has the same composition and

properties wherever it is found/wherever it comes from

 What is the scientific method? - CORRECT-ANSWERSA method that results in a

theory/law

 Scientific method procedure? - CORRECT-ANSWERS1. Ask a question

 2. Background Research

 3. Create a hypthesis (testable statement)

 4. Test hypothesis

 5. Analyze data (graphs)

 6. Report results (scientific paper)

 -Will result in theory (not proven, can change) or a law (proven, never changes)

 How do you solve for a percentage? - CORRECT-ANSWERSYou divide part/whole and

then multiply the numbers by 100%

,  What are the 2 units of measurement? - CORRECT-ANSWERS1. Metric System

 2. International system of units (SI)

 Metric units for length, volume, mass, temp., and time - CORRECT-ANSWERS1.

Length: Meter (m)

 2. Volume: Liter (L)

 3. Mass: Gram (g)

 4. Temp: Degree Celsius (*c)

 5. Time: Second (s)

 SI units for length, volume, mass, temp, and time - CORRECT-ANSWERS1. Length:

Meter (m)

 2. Volume: Cubic Meter (m^3)

 3. Mass: Kilogram (Kg)

 4. Temp: Kelvin (K)

 5. Time: Second (s)

 Units you will most commonly use? - CORRECT-ANSWERSKilo- 1000 (K), Centi-

0.01 (c), and milli- 0.001 (m)

 How many grams in 1 Kg? - CORRECT-ANSWERS1000g

 How many cg in 1 gram? - CORRECT-ANSWERS100cg

 How many mg in 1 gram? - CORRECT-ANSWERS1000mg

 Volume - CORRECT-ANSWERSThe amount of space a substance occupies

 Mass - CORRECT-ANSWERSA measure of the quantity of material an object contains

*Stays the same but weight changes*