writing chemical equations

Which is the correct chemical equation for the following:

Barium Chloride combined with sodium sulfide yields barium sulfide and sodium chloride

• BaCl + NaS → BaS+ NaCl

• BaCl₂ + Na₂S → BaS+ NaCl

• BaS+ NaCl → BaCl + NaS

• BaCl₂ + Na₂S → BaS+ NaCl₂

Tags

NGSS.HS-PS1-7

What is the correct formula for Sodium Oxide?

• NaO
• NaO₂
• Na₂O
• Na₂O₂
• NaOH

Which is NOT a diatomic molecule?

• Fluorine
• Nitrogen
• Phosphorus

• Bromine

Tags

NGSS.MS-PS1-1

Select the pair of words that correctly displays the general FORMAT for writing CHEMICAL EQUATIONS.

• products  -->  reactants
• products  -->  products
• reactants  -->  products
• reactants  -->  reactants

Which is the correct chemical equation for the following:

Zinc reacts with silver (I) chloride to produce Zinc (II) chloride and silver metal

• Zn + AgCl → ZnCl₂ + Ag

• ZnCl₂ + Ag → Zn + AgCl

• ZnCl₂ + Ag₂ → Zn + AgCl

• Zn₂Cl + Ag → Zn + AgCl

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What would be the properly balanced chemical formula for combining Aluminum and chlorine :

• AlCl₃
• Al₃Cl
• AlCl
• Al₃Cl₃

Tags

NGSS.HS-PS1-7

Magnesium Nitrate

• Mg(NO₃)₂

• Mg (NO₃)₃

• Mg (NO₃)

• Mg₃N₂

Tags

NGSS.MS-PS1-1

Lead (II) Nitrate

• Pb(NO₂)₂

• Pb(NO_3)₂

• PbNO_3

• Pb₃N₂

Tags

NGSS.HS-PS1-1

Sodium Hydroxide

Calcium Hydroxide

• CaOH

• CaH₂

• Ca(OH)₂

• CaOH₂