Nomenclature/Balancing Equations

What is the balanced chemical equation for the word equation shown?

• 2P (s) + Cl2(g) → 2PCI (s)

• 2P(s) + 2Cl2(g) → 4PCI (s)

• 2K(s) + C2(g) → 2KC2 (s)

• 2K(s) + Cl2(g) → 2KCI (s)

Tags

NGSS.HS-PS1-7

Which of the following is the correct balanced equation?

• 2Cu +AgNO3 → 2Cu(NO3)₂ + 2Ag

• Cu + 2AgNO3 → Cu(NO3)₂ + 2Ag

• Cu + 2AgNO3 → Cu(NO3)₂ + Ag

• Cu + AgNO3 → Cu(NO3)₂ + Ag

• 2Cu + 2AgNO3 → Cu(NO3)₂ + Ag

Tags

NGSS.HS-PS1-7

Which of the following shows this equation balanced?

• 2SnO₂ + 2H₂ → 4Sn + 4H₂O

• 2SnO₂ + H₂ → 2Sn + H₂O

• SnO₂ + 2H₂ → Sn + 2H₂O

• 2SnO₂ + 3H₂ → 6SnO₂ + 6H₂O₂

Tags

NGSS.HS-PS1-7

What is the correct balanced equation for the formation of diphosphorus pentoxide from its elements?

• 2P₄+ 2O₂ → 2P₂O₅

• 2P₄+ 5O₂ → 2P₂O₅

• P₄+ 5O₂ → 2P₂O₅

• P₄ + 4O₂ → 4P₂O₅

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The formula N₂O₆ represents an example of —

• an ionic formula

• a molecular formula

• an empirical formula

• a structure formula

The oxidation number on the magnesium atom in the compound Mg₃(PO₄)₂ is —

• 3+

• 2+

• 1+

• 4+

Which of the following electron dot diagrams represents a member of the noble gases?

• .. X

• .. X ..

• .. X ..

• .. X ..

Tags

NGSS.HS-PS1-1

The 2 in H₂SO4 is -

• an exponent

• an oxidation number

• a subscript

• a coefficient

Which example is NOT a compound?

• CO

• Pb

• PO

• NH4

Tags

NGSS.MS-PS1-1

What is the chemical formula for lead(II) carbonate?

• PbO

• Pb CO

• PbCO₃

• CO₃(PbO)