Balancing and Identifying Chemical Equations - 2

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

• the product is doubled
• the product is half the mass of the reactants
• the mass is the same
• the mass changes depending on the reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which one is an element?

• Co
• CO
• CO₂
• CO₃^-2

Tags

NGSS.MS-PS1-1

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂ O₃

• 2
• 6
• 1
• 4

Tags

NGSS.MS-PS1-1

Balance this equation-
​ (a)   ​ P₄ + ​ (b)   O₂ --> ​ ​ (c)   P₂O₃

• 1
• 3
• 2
• 4
• 0

Tags

NGSS.HS-PS1-7

3Ca + 2AlCl₃ --> 3CaCl₂ + 2Al

• Synthesis
• Decomposition
• Single diplacement
• Double displacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• Yes
• No

Tags

NGSS.MS-PS1-5

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

Pb(NO₃)₂  +  KI --> PbI₂ + KNO₃
What type of reaction is this? 

• Synthesis 
• Decomposition 
• Single Replacement
• Double Replacement 

Tags

NGSS.MS-PS1-2