KMT Day 1

Multiple Select

Which of the following items are a pure substance?

• Sulfur

• Juice

• Salt water

• Salt

Multiple Choice

A mixture or a pure substance?

• Mixture

• Pure Substance

Multiple Choice

Physical properties:

• do not change during a chemical reaction.

• can only be observed by the sense of sight.

• can be observed even if the substance is divide into 2 parts.

• All of the Above.

Multiple Choice

Which of the following equations represents a physical change?

• CH_{4 (g)} + O₂ (g)--> H₂O (l) + CO₂(g)

• CO_{2 (g)} + Na⁺ _(aq) --> Na⁺ _(aq) + CO_{2 (g)}

• KNO₃ + NaCl --> KCl + NaNO₃

• HCl + Br₂ --> BrCl + H₂

Multiple Choice

Is milk going sour a physical or chemical change?

• Physical 

• Chemical

Multiple Choice

Reacts with Water: Chemical or Physical Property

• Chemical Property

• Physical Property

Multiple Choice

Ability to rust is this type of property:

• Physical property

• Chemical property

Multiple Choice

Which of the following is a physical change?

•  Iron is oxidized to iron oxide

• Aluminum metal is pounded into thin sheets

• Copper reacts with a strong acid

• Sodium metal explodes on contact with water

Multiple Choice

Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?

• burning the sugar cube with a match

• crushing the sugar cube and dissolving it in water

• dehydrating the sugar cube with sulfuric acid

• chewing the sugar cube and digesting it

Multiple Choice

Diane draws a picture on a piece of paper and then folds it into a paper airplane. She throws it at her little brother, and it hits him in the head. He responds by ripping up the paper. Which of the following is an example of a physical change?

• ripping up the paper

• folding the paper into an airplane

• drawing on the paper

•  all of these

Multiple Choice

What does the symbol inside the circle mean?

• "yields, or produces"

• "dissolved in water"

• "forms a precipitate"

• "released as a gas"

Multiple Choice

fireworks exploding

• physical change

• chemical change

Multiple Choice

a rusting bicycle

• physical change

• chemical change

Multiple Choice

glass breaking

• physical change

• chemical change

Multiple Choice

frying an egg

• physical change

• chemical change

Multiple Choice

separating sand and gravel

• physical change

• chemical change

Multiple Choice

32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water

• 8

• 12

• 24

• 40

Multiple Choice

What is the arrow in a chemical equation...
H_{2 +} O --> H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

Multiple Choice

12g of Carbon reacts with 16g of Oxygen, how much carbon monoxide (CO) is formed? 

• 28 g

• 4g

• 30g

• 12g