Calculate the molar solubility of AgCl in a 2.00−L solution containing

14.0 g

of

dissolved CaCl₂.

What is meant by homogeneity of powdered sample? How will this affect percentage purity of KHP?

Which of the following is an example of a chemical property?

Follow the decay of parent 87Rb and growth of daughter 87Sr in a granite sample over the course of six half-lives. Assume that the granite initially contains 1.2 x 10^20 atoms of 87Rb and 0.3 x 10^20 atoms of 87Sr. The half-life of 87Rb is 48.8x10^9 years. Show the results graphically on the graph paper below.

A lab assistant needs to prepare solutions of ZnSO4, NaCl, Na2CO3, Fe2(SO4)3 and FeCl3 with identical ionic strengths of I = 1.2 M. What concentration of these salts should he/she use?

Elemental phosphorus reacts with chlorine gas according to the equation:
P4(s)+6Cl2(g)→4PCl3(l)
A reaction mixture initially contains 45.83 g P4 and 130.2 g Cl2.

QUESTION: Once the reaction has occurred as completely as possible, what mass (in g) of the excess reactant is left?

Explain why terminal alkynes give an aldehyde when the reagent is BH3 / H2O2/NaOH but methyl ketones when the reagent is Hg2+and H3O+,

Na/NH3 A reagent that gives a stereoselective product ( i.e. a trans alkene isomer)

Lindlar catalyst A reagent that gives a stereoselective product ( i.e. a cis alkene isomer)

Explain why terminal alkynes ( pKa ~ 25 ) are much more acidic than terminal alkenes ( pKa ~ 44)

Given a ketone or aldehyde write the corresponding enol form and vice versa ( i.e given an enol, write the keto tautomer)

Name or draw structures for simple to moderately complex alkynes.

1 a). Write down the Slater determinant for Lithium. Expand the determinant into linear combination of products.

b). Write down the Slater determinant for Beryllium. Expand the determinant into linear combination of products.

Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is heated to melting, it reacts with solid carbon to form liquid silicon and carbon monoxide gas. In an industrial preparation of silicon, 156.7 kg of SiO2 is allowed to react with 78.2 kg of carbon to produce 66.2 kg of silicon.

1.) Determine the limiting reactant for the reaction.

2.) Determine the theoretical yield for the reaction.

3.) Determine the percent yield for the reaction.

Translate the following from words to a chemical equation. Be sure to balance the equation.

A) Calcium chlorate ----> Calcium chloride + O₂

B) Magnesium nitrite + nickel (I) bromide ----> Nickel (I) nitrite + Magnesium bromide

Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is heated to melting, it reacts with solid carbon to form liquid silicon and carbon monoxide gas. In an industrial preparation of silicon, 156.7 kg of SiO2 is allowed to react with 78.2 kg of carbon to produce 66.2 kg of silicon.

Once the reaction has occurred as completely as possible, what mass (in g) of the excess reactant is left?

Which statement(s) about state functions is(are) correct?

(i) State functions are the opposite of path-dependent functions.

(ii) State functions have no “memory” about how they arrived at a given value.

(iii) State functions are path-dependent functions.

(iv) Heat and work are not state functions and neither is their sum a state function.

What amount of heat (in kJ) is required to convert 10.1 g of an unknown solid (MM = 67.44 g/mol) at -15.4 °C to a liquid at 42.7 °C? (heat capacity of solid = 1.95 J/g･°C; heat capacity of liquid = 1.18 J/g･°C; ∆Hfus = 5.72 kJ/mol; Tf = 28.3°C)

Until roughly 1970, tritium (3H), a radioactive isotope of hydrogen, was a component of fluorescent watch dials and hands. For 3H, t1/2 = 12.3 yr. Assume you have such a watch. If a minimum of 12.0% of the original tritium is needed to read the dial in dark places, for how many years could you read the time at night? Assume first-order kinetics.

Calcium carbide crystallizes as a cube with 1 calcium ion on each corner and one calcium ion in the center of the cell. There are 8 carbon atoms located along edges of the cell and there are two carbons internal to the cell. What is the formula of calcium carbide?

Ca₂C₃

CaC₄

CaC₃

CaC₂

CaC