Match the following

• Pure Substance

• 
• Compound

  Molecule

• 
• Gas

• 
• Mixture

• 
• Pure Substance

• 

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

Organize these Pure Substances into the right categories

Groups:

(a) Element (One type of atom)

,

(b) Compound (Different types of atoms)

• Iron (Fe)

• Nitrogen (N₂)

• Sodium Chloride (NaCl)

• Water (H₂O)

• Ozone (O₃)

• Carbon Dioxide (CO₂)

Tags

NGSS.MS-PS1-1

When a sodium atom bonds with a chlorine atom, which is formed?

Compound (Pure Substance) or a Mixture

Tags

NGSS.MS-PS1-5

Researchers examined a sample of matter found on Mars. The image shows the sketch of that sample.

Which statement correctly describes the sample?

• This is a pure substance because there are two atoms.

• This is a mixture because there are two different atoms.

• This is a Compound Molecule because there are two different atoms bonded in a fixed ratio.

• This is a Compound Molecule because there are two atoms.

Tags

NGSS.MS-PS1-1

Does the chemical equation shown support the Law of Conservation of Mass?

• Yes

  The amount of reactants and products are the same.

• No

  The product amounts are different than the reactants.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the equations below SUPPORT the Law of Conservation of Mass?

• 6 CO₂ + 6 H₂O ----> C₆H₁₂O₆ + 6 CO₂

• CO₂ + 6 H₂O ----> C₆H₁₂O₆ +

  6 CO₂

• CO₂ + H₂O ----> C₆H₁₂O₆ + CO₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Study the diagram of the chemical reaction shown.

How many Hydrogen atoms are needed on the Product side of the equation to support the Law of Conservation of Mass?

• 6

• 8

• 2

• 4

Tags

NGSS.MS-PS1-5

If a chemical reaction takes place in a CLOSED SYSTEM, how would you describe the reaction?

• The mass of the product is equal to the mass of the reactant.

• The mass of the product is greater than the mass of the reactant.

• The mass of the reactant and product will vary depending on temperature.

• The mass of the reactant is greater then the mass of the product.

Tags

NGSS.MS-PS1-5

C₃H₈ + 5 O₂ -----> 3 CO₂ + 4 H₂O

The chemical reaction above was performed in science class.

C₃H₈ in the reactants measured 220g. The reaction PRODUCED 660g of CO₂ and 360g of H₂O.

How many grams of O₂ was required in the reactants to create this reaction?

• 220

• 580

• 800

• 1,240

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following best describes a mixture?

• A substance in which atoms are bonded in a fixed ratio.

• A substance made of only one type of atom.

• A substance that cannot be separated by physical means.

• A combination of two or more substances that retain their individual properties.