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France-He-He Azienda Directories
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Azienda News:
- Question #41adf - Socratic
The molecular weight of the gas is 14 9 g mol The approach to solving this problem is to determine the number of moles of gas present under those conditions for pressure and temperature, in that respective volume Once you know how many moles you have, you can use the weight of the gas to determine its molecular weight So, use the ideal gas law equation, PV = nRT, to solve for the number of
- Question #d417b - Socratic
Convert the desired component into its respective molar quantity Then use the equations for molarity and molality This is really a chemistry question that requires algebra to solve As stated it is missing the critical information of molecular weight We will also assume that the given percentage is a mass ratio - but it should be stated explicitly for a correct answer Molarity = Moles L
- A solution containing 3. 8mg 100ml of compound B whose molecular weight . . .
A solution containing 3 8mg 100ml of compound B whose molecular weight is 280g has a trasmittance of 39 6% in a 1cm cell at 480nm
- Question #1caee - Socratic
"CO"_2 The question essentially wants you to figure out the molar mass, i e the mass of exactly 1 mole, of this compound Now, the important thing to keep in mind here is that 1 mole of a molecular substance contains 6 022 * 10^(23) molecules of that substance -> this is known as Avogadro's constant In other words, in order to have 1 mole of a molecular substance, you need to have a sample
- How many grams of NaCl are in 225 mL of a 0. 75 M NaCl . . . - Socratic
"9 9 g NaCl" The first thing you need to do here is to use the molarity of the solution to determine how many moles of sodium chloride you have in your sample As you know, molarity tells you the number of moles of solute, which in your case is sodium chloride, present in "1 L" of solution This means that a "0 75 M" sodium chloride solution will contain 0 75 moles of sodium chloride for every
- A solution is made by dissolving 75. 0 grams of glucose to . . . - Socratic
M_B = 0 0139M First you need to calculate the molarity (concentration) of the first solution from the molecular weight of glucose Then you simply use a volumetric ratio to calculate the final dilution concentration 75 180 = 0 4167 Mole ; 0 4167 2 = 0 208M solution
- How do you convert 4500 ft h to ft sec? - Socratic
one hour=3600 seconds so divide 4500 by 3600= 1 25 foot second
- Question #010b9 + Example - Socratic
Convert the moles to the mass of the element Example: What is the molar percentage and mass percentage of each element in carbon dioxide? Carbon dioxide has two oxygen atoms combined with one carbon atom: CO_2 One "mole" of CO_2 thus contains one "mole" of carbon, C, and one "mole" of oxygen, O_2, or TWO "moles" of O (it's important to know how you are defining your elements) Let's use the
- Question #7a65a - Socratic
Given that #1 41xx10^22# molecules of Styrene weigh #2 44g# We can write 1 mol or #6 03xx29^23 # molecules of Styrene will weigh
- Question #ccabf - Socratic
Now you multiply this by the molecular mass number to get the weight in milligrams (divide by 1000 to get the grams) Nickel(II)hydroxide may be formed without or (more likely) with crystal water (monohydrate: #Ni(OH)_2 H_2O#) In the first case you multiply by 92 7, in the other case by 110 7
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