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: 1.3,.7,.51,.25,.11,.052 TOTAL: 2.92
I don't know how to get n! and what to sum! (N/Na)
To calculate the average molar mass (Z) using the given data, you need to follow these steps:
1. Calculate the value of n: n represents the number of moles for each respective number. In this case, the values for n are given in millimoles. You can calculate the value of n by converting the millimoles to moles. Since 1 mole is equal to 1000 millimoles, you can divide the given millimole values by 1000 to obtain the corresponding mole values.
For example:
Given millimole values: 1.3, 0.7, 0.51, 0.25, 0.11, 0.052
Convert to moles: 1.3/1000, 0.7/1000, 0.51/1000, 0.25/1000, 0.11/1000, 0.052/1000
2. Calculate the sum of n*M: Multiply the values of n by the corresponding molar masses (M) and sum them up.
For example:
Given molar mass values: 7.5, 12.5, 17.5, 22.5, 27.5, 32.5
Sum of n*M = (1.3/1000) * 7.5 + (0.7/1000) * 12.5 + (0.51/1000) * 17.5 + (0.25/1000) * 22.5 + (0.11/1000) * 27.5 + (0.052/1000) * 32.5
3. Calculate the average molar mass (Z): Divide the sum of n*M by the total value of n.
Average molar mass (Z) = Sum of n*M / Total value of n
For example:
Given total value of n: 2.92 (obtained by summing up all the converted mole values)
Average molar mass (Z) = Sum of n*M / 2.92
By following these steps and performing the calculations, you can find the average molar mass (Z) using the given data.