![andrewcamp99](/avatars/19048.jpg)
andrewcamp99
09.07.2019 •
Chemistry
Empirical formula of a compound composed of 32.1 g potassium (k) and 6.57 g oxygen (o)?
Solved
Show answers
More tips
- F Food and Cooking Kick Your Taste Buds Into Gear with This Authentic and Delicious Recipe for Solyanka...
- O Other What happens if you get scared half to death twice?...
- F Family and Home What s That Noise When a Kettle Boils? The Science of Water and Steam...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- W Work and Career How much does an honest traffic police officer earn in a day?...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- S Style and Beauty How to Get Rid of a Bruise: Tips and Tricks...
- H Health and Medicine Is Massage Necessary? Facts and Opinions...
- L Leisure and Entertainment Should You Buy a Ceramic Knife?...
- C Computers and Internet Best Antivirus: How to Choose Protection for Your Computer?...
Answers on questions: Chemistry
- C Chemistry Select the correct answer. why does a solid change to liquid when heat is added? oa the spacing between particles decreases. o b. particles lose energy. oc. the spacing...
- P Physics Temporary magnets are made from soft iron true or false...
- E Engineering You are working with an architect to add a room extension to your house. Based on the information below, calculate a cost estimate for the wall paint needed for the...
- E English Greta and the other campers are not supposed to be out at night. What evidence in the story supports this conclusion? Greta, Liam, and the other campers in the woods...
- M Mathematics What is the median of the data set? {10, 15, 27, 33, 33, 36, 42, 47, 45, 56, 78} enter your answer in the box....
Ответ:
The empirical formula is K₂O.
The empirical formula is the simplest whole-number ratio of atoms in a compound.
The ratio of atoms is the same as the ratio of moles.
So, our job is to calculate the molar ratio of K to O.
Step 1. Calculate the moles of each element
Moles of K = 32.1 g K × (1 mol K/(39.10 g K =) = 0.8210 mol K
Moles of O = 6.57 g O × (1 mol O/16.00 g O) = 0.4106 mol 0
Step 2. Calculate the molar ratio of each element
Divide each number by the smallest number of moles and round off to an integer
K:O = 0.8210:0.4106 = 1.999:1 ≈ 2:1
Step 3: Write the empirical formula
EF = K₂O
Ответ: