Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 15

**CHEM**

how many milliliters of a stock solution of 6.0 m hno3 would you have to use to prepare 110mL of 0.500 M HNO3?

**chemistry**

What is the molarity of a solution prepared by dissolving 2.41 g of potassium iodide, KI in 100 mL of water?

**chemistry**

What is the pressure in a 1.5 L vessel containing 0.25 moles of )2 if the temperature is 37 degrees C? R the universal gas constatn is 0.082 L atm/mole K

**cheistry**

What is the fromulat for copper (II) sulfate?

**statistics**

a coin is tossed 16 times. What is the standard deviation?

**Statistics**

An insurance sales representative selects 4 policies to review. The group of policies she can select from contains 10 life policies, 5 automobile policies, and 3 homeowners policies. Find the probability of selecting all life policies. The number of ways to select all life ins...

**statistics**

A committee consisting of 6 people is to be selected from eight parents and four teachers Find the probability of selecting three parents and three teachers?

**Chemistry**

What is the molarity of a solution prepared by dissolving 4.92 g of calicum nitrate in 250 mL of water?

**Chemistry**

What volume (in liters) is occupied by 0.01 moles of carbon monoxide, CO at 9 degrees C and 0.973 atm?

**Chemistry**

Ethane, C2H6, has a molar heat of vaporization of 15kJ/mole. How many kilojoules or energy are required to vaporize 5 g of ethane?

**Chemistry**

how many gram of Co2 are formed for every gram of CH4 that combusts

**statistics**

Give the boundaries of 47.4 miles

**Chemistry**

How many grams of Fe are in 6.6 g FeO. (Remember the percent Fe in FeO is the grams of Fe in 100 g of FeO)

**Chemistry**

Lithium hydroxide is used in the space program to remove carbon dioxide (frin respiration) in spacecraft. Specifically, lithium hydroxide, LiOH reacts with carbon dioxide, CO2 to form lithium carbonate Li2Co3, and water. 2 liOH + Co2 Li2Co3+ H2O. What mass of CO2 can be absorb...

**chemistry**

What is the molarity of a solution prepared by dissolving 4.92 g of calcium nitrate in 250 mL of water? 4.92 x 164 = 806.88 806.88 x 250 =201720 is this the answer???

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