8.5D Counting Atoms

How many nitrogen atoms are in the chemical formula 5C₈H₁₀N₄O₂

• 20

• 4

• 24

• 144

Tags

NGSS.MS-PS1-1

Which correctly identifies the chemical formula of glucose?

• C₁₂H₆O₆

• C₆H₁₂O₆

• C₆H₆O₆

• C₅H₁₀O₆

Tags

NGSS.MS-PS1-1

Which chemical formula is represented by the model?

• B₂W₃

• B2W3

• 2B₂W

• 2B₃W

Tags

NGSS.MS-PS1-1

Which statement correctly identifies location C in the graphic?

• Allows portions of a chemical formula to be repeated

• Identifies the element in a chemical formula

• Indicates that the subscripts must be multiplied

• Determines the number of atoms in the chemical formula

The chemical formula for sulfuric acid is H₂SO₄

Which of the following correctly represents how many atoms of each element are present in the compound?

• H-8 atoms, S-1 atoms, O-4 atoms

• H-6 atoms, S-4 atoms, O-4 atoms

• H-2 atoms, S-1 atoms, O-4 atoms

• H-2 atoms, S-2 atoms, O-4 atoms

Tags

NGSS.MS-PS1-1

• C₃H₈O and NaHCO₃

• MgSO₄ and NaHCO₃

• NH₄OH and C₃H₈O

• C₂H₄O₂ and MgSO₄

Tags

NGSS.MS-PS1-1

How many oxygen atoms are in the following chemical formula?

Al₂(CO₃)₃

• 3

• 6

• 9

• 18

Tags

NGSS.MS-PS1-1

A group of students discusses how to determine the number of atoms in each substance. Student 1 states that the coefficient determines the number of atoms in each substance. Student 2 says the subscripts determine the number of atoms in each substance and Student 3 thinks the chemical symbols determine the number of atoms in each substance. Which student is correct?

• Student 1

• Students 1 and 2

• Student 2

• Students 2 and 3

Tags

NGSS.MS-PS1-1

What is the best description of this molecule of caffeine?

C₈H₁₀N₄O₂

• Eight atoms of carbon, ten atoms of hydrogen, and two atoms of oxygen

• Eight atoms of carbon, ten atoms of hydrogen, four atoms of nitrogen, and two atoms of oxygen

• Eight atoms of carbon, ten atoms of hydrogen, two atoms of nitrogen, and four atoms of oxygen

• Eight atoms of carbon, ten atoms of hydrogen, and six atoms of oxygen

Tags

NGSS.MS-PS1-1

How many hydrogen atoms are in one molecule of baker's ammonia? (NH₄)₂CO₃

• 8

• 2

• 10

• 14

Tags

NGSS.MS-PS1-1