Chemical equations

The substances listed on the left side of a chemical equation are the

• Products
• Coefficients
• Precipitates
• Reactants

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In the following equation, what are the products?
HCl + Zn → H₂ + ZnCl₂

• HCl + Zn
• H₂ + ZnCl₂
• Zn → H₂
• the stuff on the outside

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

In chemical reactions, what does the principle of conservation of mass mean?

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

Tags

NGSS.MS-PS1-5

How many Oxygen (O) atoms are in 2C₂HO₈C_l2

• 2
• 16
• 8
• 5

Tags

NGSS.MS-PS1-1

How many Hydrogen (H) atoms are in NH₃O5

• 3
• 4
• 5
• 1

Tags

NGSS.MS-PS1-1

How many oxygen atoms are present in the following? 
4Ca(OH)₂

• 4
• 6
• 8
• 1

Tags

NGSS.MS-PS1-1

Which of the following is true? 

• Na is a gas
• Cl combusts when put in water
• NaCl is very different than Na and Cl
• Cl is a metal

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

NGSS.MS-PS1-2

 Fill in the blank to balance the chemical equation. 
2KI  +  ____Cl₂ →  2KCl  +  I₂

• 1
• 2
• 3
• 4

Tags

NGSS.MS-PS1-5

What coefficient should go in the blank space to balance the chemical equation? 
2Al  +____  HCl   →    2AlCl₃  +  3H2

• 2
• 4
• 3
• 6

Tags

NGSS.MS-PS1-5

Which equation shows magnesium sulfate plus sodium carbonate?

• MgSO₄ + Na₂CO₃
• MgCO₃+ Na₂SO₄
• MgNa₂ + CO₃SO₄
• Mg + S + Na + C

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1