Word to Skeleton to Balancing Equations

Is the following equation word or skeleton

Mg _(s) + Br_{2 (g)} --> MgBr_{2 (aq)}

• Word Equation

• Skeleton Equation

Which of the following is the correct skeleton equation for the following word equation?
Calcium Chloride + Sodium --> Sodium Chloride + Calcium

• Ca + 2NaCl --> CaCl₂ + 2Na
• CaCl₂ + Na --> Ca + NaCl
• CaCl + Na --> NaCl + Ca
• CaCl₂ + 2Na --> Ca + 2NaCl

Tags

NGSS.HS-PS1-7

Which equations should contain state of matter symbols?

• skeleton

• Word

Tags

NGSS.MS-PS1-4

Balance this equation-
__P₄ + __O₂ --> __P₂O₃

• it is already balanced
• 2, 1, 3
• 1, 2, 3
• 1, 3, 2

Tags

NGSS.MS-PS1-5

Which of the following is an unbalanced equation?

• CaCO₃ --> CaO + CO₂
• PbO₂ + 2H₂-->2Pb + H₂O
• 2Na+ 2H₂O-->2NaOH + H₂
• CS₂ + 2O₂ --> CO₂ + 2SO₂

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of the following shows the correct way to balance the chemical equation?
Al + O₂ -> Al₂O₃

• 4Al + 3O₂ -> 2Al₂O₃
• 2 Al + 3O₂ -> Al₂O₆
• 4 Al + O₆ -> 2Al₂O₃
• None of the options are correctly balanced.

Tags

NGSS.MS-PS1-5

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

• Yes
• No

Tags

NGSS.MS-PS1-5

Balance this equation.
_CH₄ + _O₂ --> _CO₂ + _H₂O

• 1,2,1,1
• 2,1,2,1
• 1,2,1,2
• 0,2,0,2

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Balance this equation.
_N₂+_O₂->_H₂O+_HNO₃

• not possible
• 2,2,1,2
• 2,1,1,4
• 2,2,1,4

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2