Textbook-Integrated Guide to Educational Resources

Phase	Hof (kJ/mol)	So (J/(K*mol))
white tin	0	51.5
grey tin	-2.1	44.8

Which type of stability does each exhibit at 40 ^oC?

white tin {1:MULTICHOICE:kinetically stable#No, that's incorrect.~=thermodynamically stable#Correct!}

grey tin {1:MULTICHOICE:=kinetically stable#Correct!~thermodynamically stable#No, that's incorrect.}

Check all that apply.

NH₃(g) + CH₄(g)HCN(g) + 3H₂(g)

TiCl₄ + 2Mg

Zn(ClO₃)₂(aq) + Ni(s)

CH₄(g) + O₂(g) CO₂(g) + H₂O(l)

The coefficient for oxygen in the balanced equation is ...

A₂ + 2B₂

Zn(s) + HCl(aq) ZnCl₂(aq) + H₂(g)

When 0.1 moles of zinc is reacted with 0.1 moles of hydrochloric acid ...

KOH(aq) + HBr(aq)

What are the reaction products? Does the reaction yield an acidic, basic, or neutral aqueous solution?

AgNO₃(aq) + HCl(aq) AgCl (s) + HNO₃(aq)

The unbalanced reaction equation is given below:
C₄H₁₀(g) + O₂(g) CO₂(g) + H₂O(g)

2C₇H₆O₃(s) + C₄H₆O₃(l) 2C₉H₈O₄(s) + H₂O(l)

4Fe(s) + 3O₂(g)2Fe₂O₃(s)

If 14.6 mL of 0.10 M K₂Cr₂O₇ are needed to react completely with 28 g of blood, what is the blood alcohol level of the driver?

(Water molecules are not shown in the diagrams.)

Papain is a thiol protease isolated from papaya. The optimal pH for its enzymatic activity is 6.0-7.0. Which of the following buffering systems would work best for a laboratory experiment requiring active papain at pH 6.5? What molar ratios of the compounds would you use to prepare the solution?

Which of the following reactions will be product -favored?

A 25.0 mL aliquot of a 1.44M solution of ammonia (K_b = 1.8 x 10^-5) is titrated with 1.50M HCl. Use the Indicator Table below to decide which of the indicators listed would most accurately signal the equivalence point for this titration.

Write the letter corresponding to your choice of indicator in the box.

What products will result when HSO₄^- is added to water? Complete and balance the reaction below.

HSO₄^- + H₂O ?

Enter your answer to ONE decimal place.
DO NOT use scientic notation.
DO NOT write in the units.

Calculate the pH of a {x}M sodium acetate solution.