Reference no: EM13215556
1. Calculate and record the following for the experiment performed with 20g KClO3:
a mass of the crucible with manganese(IV) dioxide (in grams) 88.100g
b mass of the crucible after potassium chlorate has been added (in grams) 108.100g
c mass of the crucible after heating (in grams) 100.267g
d mass of oxygen in sample of potassium chlorate (in grams) [(b) minus (c)] 7.833g
e mass of potassium chloride (in grams) [the mass of the original potassium chlorate added to the crucible minus (d)] 100.167g
2. Calculate your experimental mass percent of oxygen in KClO3 according to:
experimental mass percent of oxygen = [mass of oxygen lost (d)] / (mass of KClO3 added to the crucible)
7.833/108.100 =0.07
3. Using a Periodic Table Find the elements K, Cl and O, and click on each one to find their atomic weights. Use these to calculate a theoretical mass percent of oxygen in KClO3 according to:
theoretical mass percent of oxygen = (mass of 3 oxygen atoms) / (molecular weight of KClO3)
4. Calculate the percent error in the experiment using the experimental and theoretical values of the mass percent of oxygen. The percent error is defined as:
|(experimental value) - (theoretical value)| / theoretical value * 100%
5. How well does your experimental result match the theoretical value? What sources of error may explain the discrepancy?
What is the mean time in hours
: What is the mean time in hours that a customer spends in the system and What is the mean utilization percentage of the call center employee answering the phones (the server in this system)?
|
What is the big difference between concentrated and aqueous
: What is the big difference between concentrated and aqueous acids, and what role would that difference play in the reaction between 9-fluorenol and sulfuric acid?
|
Explain what is the financial break-even point
: The machine costs $575,000. The sales price per pair of shoes is $60, while the variable cost is $14. $165,000 of fixed costs per year are attributed to the machine. Assume that the corporate tax rate is 34 percent and the appropriate discount rat..
|
How external financial audit can assist to find fraud
: "Corporate Malfeasance" Please respond to the following: Evaluate the difficulties companies are faced in implementing a control framework against fraud under Sarbanes-Oxley (SOX). In your evaluation, discuss how the external financial audit can a..
|
Find the elements k, cl and o
: Calculate the percent error in the experiment using the experimental and theoretical values of the mass percent of oxygen.
|
Destinations where uncontrolled tourism growth
: Give three examples of destinations where tourism planning has been successful, as well as three destinations where uncontrolled tourism growth has taken place.
|
How many grams of crso4 will be made
: how many grams of CrSO4 will be made from 41.0 grams each of Zn, K2Cr2O7, and H2SO4?
|
Corporate travel management department
: Discuss the advantages associated with having a corporate travel management department or a corporate travel manager.
|
Calculate the total pressure
: A 2.63 L flask is filled with carbon monoxide at 27°c until the pressure is 6.72 ATM. Calculate the total pressure after 2.89 moles of carbon dioxide has been added to the flask.
|