Chemistry 1: Chapters 1 and 3 Test Review

Which of the following are pure substances?

20 mice (Vitamin C), 20 mice (no Vitamin C) - fed once a day, month. What is NOT a constant?

Any substance with a definite composition is

Heterogeneous mixtures have

Total Mass=18.0 g, 16.0 g = oxygen. Calculate the percent by mass of hydrogen.

The process used to separate mixtures based on the difference in boiling points is

Device which separates a mixture by spinning the contents, pulling the solid to the bottom is a

No matter the amount,a compound is composed of the same elements in the same proportion by mass

A pure substance that cannot be separated into simpler substances by physical or chemical means

When 6.0g of mercury oxide are heated, 5.5g of mercury remain. How much oxygen was given off?

Which of the following is a set of controlled observations that tests a hypothesis?

An element that would have properties similar to sodium would be

Which of the following is an example of quantitative data?

Which of the following is NOT a benefit of an alloy?

Scientists use events from the __ world to explain events in the __ world depicted with models.

If heat is absorbed during a chemical reaction, the reaction is

What is a scientific theory?

A judgment based on the information obtained during an experiment is

About how many elements occur naturally on Earth?

Which of these techniques can be used to separate sand from water?

In a chemical reaction, the new substances formed (right side of the arrow) are called

Chunky peanut butter is a

In the "cold flask" demo, the flask got cold when two chemicals were mixed. This reaction was

A biologist studying how earthworms behave in response to moisture. Dependent variable?

Air is a

"Mass of reactants = mass of products" is an equation showing

Which element's symbol is incorrectly written?

Which would be called a vapor if it were heated to the gaseous phase?

Density is

Mass is

Which of these types of changes can sometimes be reversed without a chemical reaction?

Sucrose is 51.30% oxygen. How many grams of oxygen are found in 50.00 grams of sucrose?

The reactants are located on the right side of the yields sign (arrow) in a reaction.

The act of gathering information is

The branch of chemistry that focuses on carbon-containing chemicals is called ____________.

Which of the following is NOT an indication of a chemical change?

Wood burning is primarily

Reacting with oxygen to form rust is a

A carbonated beverage (soda) is an example of which of these types of mixtures?

The study of the structure and behavior of matter is

An object has a mass of 600kg on Earth. What is its mass on the moon? (gravity 1/6 on moon)

If you want to analyze ink, what separation technique should you use?

How should you prepare an acid solution?

Which of the following is NOT matter?

In the presence of a base

Which states that mass is neither created nor destroyed in any process?

Lightning is an example of which state of matter?

Which is an example of an alloy?

The ratio of the mass of a single element to the total mass of a compound it is in is

Dmitri Mendeleev developed the first

Vertical columns on the periodic table are called

A form of matter with a constant volume that takes the shape of its container is

A student is using H₂O and H₂O₂. The amounts of oxygen can be expressed in a simple ratio.

A separation technique that creates pure solid particles from a dissolved solution is

A form of matter with a definite shape and volume is a

A visual, verbal, or mathematical explanation of how things occur is

What is mass?

A systematic approach used in all scientific study is

Anything that has mass and takes up space is

Ice melting is a

Which of the following states of matter are considered to be virtually not compressible?

Solutions are

React 45.65g of Na with an unknown amount of Cl to produce 157.30g NaCl. How much Cl reacted?