Gen Chem Final Quiz

What mass of Mg(NO3)2 is required to produce 0.2500 L of a 0.0750 M solution? 1 mole of Mg(NO3)2 =148.33g

Answer explanation

What mass of sodium ions are there in 25 ml of 0.75 M Na2SO3?

Answer explanation

As water is being added to a concentrated NaOH soln. :

• V increases

  M increases

• V decreases

  M increases

• V increases

  M decreases

• V decreases

  M decreases

What is the net ionic rxn when combining Na2S (as) + Pb(NO3)2 (aq)? Hint: sulfides render a compound insoluble.

Answer explanation

Draw the acid HF when added to water.

Answer explanation

What is the oxidation # of Mo in MoO4 ^2- ?

Answer explanation

What is being oxidized and whats being reduced? In [ Cu (s) + Zn ^2+ (aq) --> Zn (s) + Cu ^2+ (aq) ]

• Oxi: Cu ^2+ (aq)

  Red: Zn (s)

• Oxi: Zn ^2+ (aq)

  Red: Cu (s)

• Oxi: Cu ^2+ (aq)

  Red: Zn ^2+ (aq)

• Oxi: Cu (s)

  Red: Zn ^2+ (aq)

Answer explanation

Tags

NGSS.HS-PS1-2

What is the energy change for a sys that releases 100 kJ of heat to surroundings & has 25 kJ of work done on it?

Answer explanation

Tags

NGSS.HS-PS3-1

What is the hybridization of the two labeled carbon atoms?

• C1: Sp3

  C2: Sp3

• C1:Sp2

  C2:Sp

• C1:Sp3

  C2:Sp

• C1:Sp2

  C2:Sp

Answer explanation

Whats the bond order for Number 1 & 2?

Answer explanation