chemistry

How do I calculate the average Z molar mass, 1/n (Summation) of n*M given this data: (alternate equation: MZ=Summation N*M^3/Summation N*M^2)

(Ave molar mass, mass of sample):

(7.5,9.6) , (12.5,8.7), (17.5, 8.9), (22.5, 5.6), (27.5, 3.1), (32.5,1.7)

mili moles for repective numbers: 1.3,.7,.51,.25,.11,.052 TOTAL: 2.92

I don't know what numbers to sum

1. 👍 0
2. 👎 0
3. 👁 154
1. I don't understand the question. Perhaps another tutor will.

1. 👍 0
2. 👎 0
2. thanks for taking a look! :)

1. 👍 0
2. 👎 0
posted by tom

Similar Questions

1. chemistry help!!

How do I calculate the average Z molar mass, 1/n (Summation) of n*M given this data: (Ave molar mass, mass of sample): (7.5,9.6) , (12.5,8.7), (17.5, 8.9), (22.5, 5.6), (27.5, 3.1), (32.5,1.7) mili moles for repective numbers:

asked by tom on February 24, 2015
2. general chemistry

Calculate the molar mass that would be obtained from the actual experimental data under the following conditions. The unknown is methyl propyl ether (CH3OC3H7) which has a vapor pressure of 375.2 torr at room temperature, 20C. The

asked by cinderrrr on November 22, 2011

Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2)

asked by Josh on October 24, 2011
4. Chemistry

Using the data collected for part c on your data sheet and assuming the density of the vinegar is 1.00g/mL, 1) calculate the molar concentration of acetic acid (CH3COOH) in the vinegar sample using the average volume of NaOH. 2)

asked by Josh on October 24, 2011
5. chemistry

KHP is a monoprotic acid with a molar mass of 204.22 g/mol. The titration data are as following. The average concentration of NaOH solution is M. 1 2 3 mass of KHP (g) 2.789 2.543 2.612 vol NaOH used (mL) 27.77 23.22 27.12 You

asked by jared on May 16, 2007
6. Chemistry

Using the data collected for part b on your data sheet, calculate the molar mass of the unknown acid. Include the calculation for each trial and the average. Trial One Results: Mass unknown acid: 0.500g Final buret reading:

asked by Josh on October 24, 2011

Using the data collected for part b on your data sheet, calculate the molar mass of the unknown acid. Include the calculation for each trial and the average. Trial One Results: Mass unknown acid: 0.500g Final buret reading:

asked by Josh on October 24, 2011
8. Chem (Help!)

I really need help answering these questions. A sample of CO2 gas with a mass of 0.30 g is placed in a 250 mL container at 400 K. What is the pressure in atmospheres exerted by this gas? Before you can put the numbers into an

asked by Lisa on April 28, 2008
9. math

Summation of indexed data, I added the numbers up and I get -27 find the summation 29x does this mean I multiply the -27 by 29 Thank you

asked by Mary Ann on July 12, 2015
10. chimestry

more volume of NaOH means more moles of NaOH (volume * molarity = mole ; molarity=constant) , more moles of NaOH means more grams and mole of HCl and more grams and/or mole and/mass of M2CO3 (note that they are both on the same

asked by fred on November 8, 2010

More Similar Questions