Unit 2 Review

According to the Chemical Compounds table, how many atoms of hydrogen are in Ethanol?

• 0

• 2

• 5

• 6

Tags

NGSS.MS-PS1-1

According to the Chemical Compounds table, how many total atoms are in Glucose?

• 3

• 18

• 24

• 432

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NGSS.MS-PS1-1

According to the Chemical Compounds table, how many total elements are in Ethanol?

Mathematical Equivalence

OFF

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NGSS.MS-PS1-1

This diagram is a model of a molecule of methane. What is the formula for methane?

• CH₈

• C₈H₄

• CH₄

• C₈H₈

Tags

NGSS.MS-PS1-1

The formula below represents the most common carbohydrate known as glucose. It is classified as a monosaccharide. Glucose is synthesized by chlorophyll in plants as they use carbon dioxide from the air and sunlight as an energy source during the process of photosynthesis. Which information can be determined from the chemical formula?

C₆H₁₂O₆

• The structural arrangement of the atoms in a glucose molecule

• The color of the glucose molecule

• The size of the glucose molecule

• The number of atoms of each element in a glucose molecule

Tags

NGSS.MS-PS1-1

Which of the statements in the table is true?

• I and II

• III and IV

• I and III

• II and III

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NGSS.MS-PS1-1

Which of the formulas in the table contain the same number of oxygen atoms?

• Formulas I and II

• Formulas II and IV

• Formulas I, II and III

• Formulas I, II and IV

How many atoms are in one molecule of baking soda, NaHCO₃?

Mathematical Equivalence

ON

Tags

NGSS.MS-PS1-1

The chemical formula represents the substance glucose.

2C₆H₁₂O₆

How many molecules of glucose are represented?

• 2

• 6

• 12

• 24

A student placed 2 grams of baking soda in a balloon and 100 ml of vinegar in an Erlenmeyer flask. After stretching the opening of the balloon across the neck of the flash, the student raised it to dump the baking soda into the flask. He immediately observed foaming bubbles in the flask and the balloon began to expand. An accurate conclusion would be that

• only a physical change was occurring

• the baking soda and vinegar were products of a chemical reaction

• the gas was oxygen

• the bubbles indicated a chemical change was occurring

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5