Y9 Chemistry Revision Week 9

How many Calcium atoms are in this compound? 
Ca (OH)₂

• 2
• 3
• 1
• 4

Tags

NGSS.MS-PS1-1

Is this equation balanced or unbalanced? 
H₂ + O₂ --> H₂O

• balanced
• unbalanced

Tags

NGSS.MS-PS1-5

What do we call the chemicals that result from a chemical reaction?

• reactants

• products

• subscripts

• coefficients

Tags

NGSS.MS-PS1-5

Substances present at the start of a chemical reaction

• subscripts
• coefficients
• reactants
• products

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What does the principle of conservation of mass mean?

• The total mass of the reactants is more than the products
• Matter is not created or destroyed
• The total mass of the reactants is less than the products

Tags

NGSS.MS-PS1-5

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Yield
• Subscript

Tags

NGSS.HS-PS1-7

Name the part in red:

_2_H₂ + _1_O₂ -> _2_H₂O

• Coefficient
• Product
• Yield
• Subscript

Tags

NGSS.HS-PS1-7

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Reactant
• Subscript

Tags

NGSS.MS-PS1-1

Name the part in red:

H₂ + O₂ -> H₂O

• Coefficient
• Product
• Reactant
• Subscript

How many Oxygen atoms are in 4H₂O?

• 4
• 1
• 0
• 8

Tags

NGSS.MS-PS1-1