Atoms, Elements, Molecules and Compounds

Determine if the equation 2Mg + O₂ → 2MgO is balanced or not balanced.

• Balanced

• Not Balanced

Tags

NGSS.MS-PS1-5

Find the total number of atoms for the reactants in the equation: H₂ + Cl₂ → 2HCl.

• Total Number of atoms for Reactants: 4

• Total Number of atoms for Products: 4

• Total Number of atoms for Reactants: 3

• Total Number of atoms for Products: 5

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

H₂ + Cl₂ → 2HCl ---- Based on this equation, how many molecules of HCl are in the product?

• 2

• 1

Tags

NGSS.MS-PS1-5

For the reaction C + Cl₂ → CCl₄, is the equation balanced or not balanced?

• Not Balanced

• Balanced

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

For the reaction 2NaCl → 2Na + Cl₂, is the equation balanced or not balanced?

• Balanced

• Not balanced

• Partially balanced

• Cannot be determined

Tags

NGSS.MS-PS1-5

For the reaction C + 2H₂ → CH₄, how many carbon atoms are in the product?

• 1

• 4

Tags

NGSS.MS-PS1-1

For the reaction N₂ + H₂ → NH₃ - what are the reactants?

• N₂ + H₂

• NH₃

• N₂ + H₂ → NH₃

• →

Tags

NGSS.MS-PS1-2

For the reaction SiCl₄ → Si + Cl₂, how many molecules are the reactant SiCl₄?

• 4

• 2

• 1

• 0

Tags

NGSS.MS-PS1-5

For the reaction 3Fe + 4H₂O → Fe₃O₄ + 4H₂, fill in the total number of atoms in the products.

• 15

• 9

• 11

• 7

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Number of C: ​ (a)  

Number of H: ​ (b)  

Number of O: ​ (c)  

• 4
• 6
• 8
• 2
• 3
• 1
• 5
• 7
• 9
• 10

Tags

NGSS.MS-PS1-1