Chemistry Pretest 2023

The number of Sodium (Na) atoms in Na₂CO₃

• 1

• 2

• 3

• 6

Tags

NGSS.MS-PS1-1

How many elements are in the compound C₂H₈O ?

• 2

• 1

• 3

• 0

Tags

NGSS.MS-PS1-1

How many total atoms are in the compound C₂H₈O ?

• 11

• 2

• 8

• 1

Tags

NGSS.MS-PS1-1

How many Sodium (Na) are in 6NaCl?

• 1
• 12
• 6

Tags

NGSS.HS-PS1-7

How many Hydrogen are in 4H₂O?

• 6
• 8
• 2
• 4

Tags

NGSS.MS-PS1-1

The substances at the beginning (left) of a chemical equation are called the ____

• product

• yield

• chemical symbol

• reactants

What is the right part of a chemical equation called...

H_{2 +} O₂ --> H₂O

• Reactants

• Products

• Yields

• Chemical Equation

How do you Balance This Equation?

__Al + __O₂--> __Al₂O₃

• 4,1 --> 2
• 4,3 --> 4
• 3,4 --> 1
• 4,3 --> 2

Tags

NGSS.HS-PS1-7

How do you Balance This Equation?

__H₂SO₃ + __KOH--> __H₂O+ __K₂SO₃

• 2,1 --> 2,1
• 1,2 --> 1,1
• 1,2 --> 1,2
• 1,2 --> 2,1

Tags

NGSS.HS-PS1-7

How do you Balance This Equation?

__H₂ + __S --> __H₂S

• 1,1 --> 1
• 2,2 --> 2
• 1,2 --> 1
• 1,2 --> 2

Tags

NGSS.HS-PS1-7