# blog

## Question 1 (2 pts) Predicting relative solubilities of substances Which compound is more soluble in the given solvent?

Question 1 (2 pts) Predicting relative solubilities of substances Which compound is more soluble in the given solvent?1-butanol (CH3CH2CH2CH2OH) or butane (CH3CH2CH2CH3) in waterChloroform (CHCl3) or carbon tetra chloride (CCl4) in waterQuestion 2 (3 pts) Using Henry’s Law to calculate gas solubility If air contains 78% N2 by volume, what is the solubility of N2 in water of 25oC and 1 atm (Henry’s constant kH for N2 in H2O at 25oC = 7 x 10-4 mol/L.atm)?Question 3 (3 pts)In a solution of 20 g NaCl and 40 g of water, there are_____ g solute_____ g solvent_____ g solutionQuestion 4 (4 pts)Calculate the molarity of each of the following solutions20.0 g NaCl in 1.0 L H2O33 g glucose, C6H12O6, in 5.00 x 102 mL solutionQuestion 5 (4 pts)Calculate the number of grams of solute that would be needed to make each of the following solutions2.50 x 102 mL of 0.100 M NaCl2.50 x 102 mL of 0.200 M C6H12O6, glucoseQuestion 6 (6 pts)a) A saturated silver chloride solution contains 1.58 x 10-4 g silver chloride per 100 mL solution. What is the molarity of the solution?b) How many grams of silver and how many grams of chloride ions are in 1 L of solution?Question 7 (4 pts) Calculate the molarity of the following solutionsDissolve 0.1 g of CaCO3 in 1 L of solution. 71 g of Na2SO4 is dissolved in 6.0 L of solution. 68 g of CaSO4 is dissolved in 4.0 L of solution. 80 grams of NaOH is dissolved in 2.0 L of solutionQuestion 8 (5 pts) More molarity problems.2 moles of salt are dissolved in 5 L of solution. What is the molarity of the solution?What is the molarity of a solution if 10.0 g of HCl are dissolved in 400 mL of solution?What is the molarity of a solution if 15.0 g of NaOH is dissolved in 1400 mL of solution?How many moles of solute are in 300 mL of a 0.450 M solution?How many moles of KCl are in100 mL of a 0.110 M KCl solution?Question 9 (3 pts) Calculating molalityHow many grams of glucose (C6H12O6) must be dissolved in 563 gram of ethanol (C2H5OH) to prepare a 2.40 x 10-2 m solution?Question 10 (3 pts): Osmotic pressureA 0.30 M solution of sucrose (C12H22O11) at 37oC has approximately the same osmotic pressure as blood. What is the osmotic pressure of blood?Question 11 (3 pts): Freezing point depressionThe freezing point of benzene is 5.5oC. What is the freezing point depression of a solution of 5.00 g naphthalene (C10H8) in 444 g benzene (Kf of benzene = 4.90oC/m)?Question 12 (6 pts) Solutions and MixturesWhat is the concentration of solute particles (or ions) in mol/L present in 1 L of the following aqueous solutions? Assume all compounds listed are soluble. (Hint: which of these compounds are ionic compounds and will dissociate, and which ones are not? See also Chapter 2 and 3)0.07 M KI0.07 M K2SO40.070 M Ba(NO3)20.070 M Na3PO40.070 M ethanol (C2H5OH)2.50 M (NH4)3PO4Question 13 (4 pts) Concentrations (Show your calculations!)How many moles of (NH4)3PO4 are present in 100.0 mL of 2.50 M (NH4)3PO4?How many moles of ions are present in 100.0 mL of 2.50 M (NH4)3PO4?

## The Australian 50 cent coin has the shape of a regular dodecagon, which is a polygon with 12 sides. Eight of these 50 cent coins will fit exactly on…

The Australian 50 cent coin has the shape of a regular dodecagon, which is a polygon with 12 sides.Eight of these 50 cent coins will fit exactly on an Australian \$10 note as shown. What fraction of the \$10 note is not covered?

## On February 16, 2012, the Department of Health and Human Services (HHS) announced that it would initiate the rulemaking process to postpone the date…

On February 16, 2012, the Department of Health and Human Services (HHS) announced that it would initiate the rulemaking process to postpone the date for implementation of ICD-10-CM/PCS. This announcement had quite an effect on healthcare providers and HIM professionals. Research how this ICD-10-CM/PCS delay affects each the following groups and post your summary:physicianshospitalsHIM educators

## The Global Workplace Assignment Type: Individual Project Deliverable Length: 500 – 700 words Outsourcing work to other countries is problematic for…

The Global WorkplaceOutsourcing work to other countries is problematic for organizations. You have taken on a new client that wants to outsource much of it customer care center to another country. The driving business need for the organization is that the current call center overhead is driving down thebottom line. Moving the call center offshore to Asia will mean the loss of over 120 jobs at their South Carolina center. Discuss the legal, moral and businessimplications of such a move, including the impact to workforces in both countries.

## I’m not sure how to work this problem out : Two hundred people apply for four jobs. Sixty applicants are women. What is the probability that at least…

I’m not sure how to work this problem out :Two hundred people apply for four jobs. Sixty applicants are women. What is the probability that at least one is a woman?

## Which statement describes best the overall message in this political cartoon? People should be more environmentally friendly during the holiday season. Our forests are being depleted during the holida

Which statement describes best the overall message in this political cartoon? People should be more environmentally friendly during the holiday season.

Our forests are being depleted during the holiday season.

Be cautious of companies that make statements about being environmentally friendly.

Increased spending during the holidays benefits the economy.

## In 100-150 words answer the following questions: Use an example to explain the difference between a logical process models and physical process…

In 100-150 words answer the following questions:1. Use an example to explain the difference between a logical process models and physical process models.2. A wealthy businessman owns a large number of paintings that he loans to museums all over the world. He is interested in setting up a system that records what he loans to whom so that he does not lose track of his investments. He would like to keep information about the paintings that he owns as well as the artists who painted them. He also wants to track the various museums that reserve his art, along with the actual reservations. Obviously, artists are associated with paintings, paintings are associated with reservations, and reservations are associated with museums.a. Which four entities would belong on this data model? b. Which are some of the basic attributes for each entity?3. Describe how Joint Application Design (JAD) might be considered a better information-gathering technique than the traditional method of requirements gathering? What are its shortcomings?