ICP Chemical Change

In the reaction: Fe + CuSO₄ --> Cu + FeSO₄

Which substances are the products? Check all that apply.

• Fe

• Cu

• CuSO₄

• FeSO₄

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is the proper way to represent 2 Fe?

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• 
• 
• 

Answer explanation

Sodium (Na) is a monatomic element. The coefficient 2 means to draw 2 individual atoms of Sodium.

Tags

NGSS.MS-PS1-1

Mg(OH)2 is a (a)  

• element
• compound
• mixture
• reactant

Answer explanation

You can tell because it has symbols for more than one element in its formula. Remember that Mg is one element because the g is lowercase. Each Capital letter represents an element.

Tags

NGSS.MS-PS1-1

In the reaction: Fe + CuSO₄ --> Cu + FeSO₄

Which substances are the reactants? Check all that apply.

• Fe

• Cu

• CuSO₄

• FeSO₄

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-1

What is the correct way to represent Cl₂?

• 
• 
• 
• 

Answer explanation

The subscript of 2 means that there are 2 atoms of the element joined together. Hydrogen (H) is one of 7 diatomic elements. You should draw one molecule that has 2 atoms of H connected to each other.

Tags

NGSS.MS-PS1-1

In this type of chemical reaction, there is only 1 product. (a)  

• combustion
• single replacement
• decomposition
• synthesis

In this type of chemical reaction, there is only 1 reactant.

• combustion

• single replacement

• decomposition

• synthesis

If the products are CO2 and H2O, the reaction is likely this type. (a)  

• synthesis
• combustion
• single replacement
• decomposition

A number written little and low to the right of a chemical symbol. It tells how many atoms of that element are present

• coefficient

• subscript

• superscript

• exponent

A number written in front of a chemical symbol or formula that tells how many molecules or atoms are needed for the reaction. (a)  

• subscript
• superscript
• coefficient
• exponent