How many Calories should there be in three grams of pure sucrose? A.4 B. 12 C. 18 D. 8 E. None of the above.

The hydrocarbon naphthalene was frequently used in mothballs until recently, when it was discovered that human inhalation of naphthalene vapors can lead to hemolytic anemia. Naphthalene is 93.71% carbon by mass, and a 0.256-mole sample of naphthalene has a mass of 32.8 g. What is the molecular formula of naphthalene? This compound works as a pesticide in mothballs by. sublimation of the .solid so that it fumigates enclosed spaces with its vapors according to the equation Naphthalene(s)naphthalene(g)K=4.29106(at298K) If 3.00 g solid naphthalene is placed into an enclosed space with a volume of 5.00 L at 25C, what percentage of the naphthalene will have sublimed once equilibrium bas been established?

For each situation described in Question 13, predict whether the entropy of the system increases or decreases.

Sodium chloride is added to water (at 25C) until it is saturated. Calculate the Cl concentration in such a solution. Species G(kJ/mol) NaCl(s) 384 Na+(aq) 262 Cl(aq) 131

xplain why aluminum cans make good storage containers for soft drinks. Styrofoam cups can be used to keep coffee hot and cola cold. How can this be?

Nitrosyl chloride, NOCI, dissociates on heating as shown below. When a 1.50 gram sample of pure NOCI is heated at 350 degrees C in a volume of 1.00 liter, the percent dissociation is found to be 57.2%. Calculate Kc for the reaction as written. NOCI(g) 2 NO(g) + 1/2 Cl,(g)

The equation for the dissolving of magnesium hydroxide is: Mg(O H)2(s) + heat Mg2"(a g) + 2 O H minus (a q) solid : dissolved What happens when a solution containing H* is added? The concentration of Mg2+ decreases. minus The concentration of O H decreases. The concentration of O H minus increases.

Consider the reaction: CH₂COOH(aq) + SO4 (aq) =HSO4(aq) + CH₂COO (aq) The K for CH₂COOH is 1.75 x 105 and the K, for HSO is 1.2 × 102. Is this reaction reactant favored or product favored? Select the single best answer. Reactant favored Product favored X 5 olo 2

Ff.136.

3) Based on the information below, determine the value of the unknown equilibrium constant, Kc. 4 CO2 (g) + 2 H2O (g) « 4 O2 (g) + 2 CH2CO (g)​Kc = 3.7 x 1017 CO2 (g) + 2 H2O (g) « CH4 (g) + 2 O2 (g)​​Kc = 8.3 x 10-15 CH4 (g) + CO2 (g) « CH2CO (g) + H2O (g)​​Kc = ?