bella122805
23.12.2019 •
Chemistry
A0.2000 g sample of a compound (vitamin c) composed of only c, h, and o is burned completely with excess o2. 0.2998 g of co2 and 0.0819 g of h2o are produced.
what is the empirical formula?
Solved
Show answers
More tips
- A Animals and plants How to Properly Care for Orchids: Secrets to Successful Cultivation...
- W Work and Career Which types of activities are not subject to mandatory licensing?...
- C Computers and Internet Thin Client: What It Is and Why You Need It?...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- F Food and Cooking Red Caviar: How to Choose the Best?...
- C Computers and Internet Clearing Cache: How to Speed Up Your Browser...
- S Style and Beauty How are artificial nails removed?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- F Food and Cooking Everything You Need to Know About Pasta...
Answers on questions: Chemistry
- C Chemistry Asap ! 1. a member of the boron family has three valence electrons, while a member of the carbon family has a four b none c three d five 2. which of the following group 7a elements...
- C Chemistry For the species o2, o2+, o2-, give the electron configuration and the bond order for each. which has the strongest bond?...
- C Chemistry Why is a rotting apple a reaction in which energy is neither absorbed nor released? a. the chemical energy in the reactants is much greater than the chemical energy in the products....
- C Chemistry Read the scenario and then answer the question. Elias is driving through the southwest part of the US on a road trip, and gets out of the car to go hiking. While hiking, he notes...
- C Chemistry A hair is 15 cm long. How old is this hair?...
- C Chemistry A moving object has 20 Joules of potential energy and has a mass of 10 kilograms. What is the formula used to velocity? How fast is the object moving in meters per second?...
- C Chemistry The fusion reaction 2/1 H + 3/1 H =4/2 He + n + energy releases 2.8 x 10^-12 joules of energy. How many such reactions must occur every second in order to light a 100-watt lightbulb?...
- C Chemistry If 750.0 mL of gaseous fluoromethane has a mass of 1.14g at STP, what is the molar mass of fluoromethane?...
- C Chemistry IF 22.3 mL of 2.60 M acetic acid react with 39.4 mL of 0.900 M radium hydroxide, which of the following best describe the resulting solution? Limited Basic Ob Ос Od Acidic Excess...
- C Chemistry Molecules of a gas move fast and are close together move fast and are far apart ling move slowly and are close together o move slowly and are far apart...
Ответ:
C3H4O3
Explanation:
We can get the answer through calculations as follows.
From the mass of carbon iv oxide produced, we can get the number of moles of carbon produced. We first divide the mass by the molar mass of carbon iv oxide. The molar mass of carbon iv oxide is 44g/mol
The number of moles of carbon iv oxide is 0.2998/44 = 0.0068
Since there is only one carbon atom in CO2, the number of moles of carbon is same as above
The mass of carbon in the compound is simply the number of moles multiplied by the atomic mass unit. The atomic mass unit of carbon is 12. The mass of carbon in the compound is thus 12 * 0.0068= 0.082g
From the number of moles of water, we can get the number of moles of hydrogen. To get the number of moles of water, we need to divide the mass of water by its molar mass. Its molar mass is 18g/mol. The number of moles here is thus 0.0819/18 = 0.00455moles
But there are 2 atoms of hydrogen in 1 mole of water and thus, the number of moles of hydrogen is 2 * 0.00455= 0.0091moles
The mass of hydrogen is thus 0.0091* 1 = 0.0091g
The mass of oxygen equals the mass of the compound minus that of hydrogen and that of carbon.
= 0.2 - 0.0091-0.082 = 0.1089g
The number of moles of oxygen is the mass of oxygen divided by its atomic mass unit.
That equals 0.1089/16 = 0.0068 moles
The empirical formula can be obtained by dividing the number of moles of each by the smallest which is that of carbon and oxygen 0.0068
H = 0.0091/0.0068 = 1.33 or 4/3
O = 0.0068/0.0068 = 1
C = 0.0068/0.0068 = 1
We multiply through by 3 to give C3H4O3
Ответ:
Causes the vapor pressure above the liquid to increase
Explanation:
When a liquid is contained and the liquid's temperature is increased, the molecules of the liquid vibrates more and more energetic molecules escape from the force holding the molecules together; they gain more kinetic energy and leave the surface of the liquid thereby increasing the vapor pressure since the molecules are contained. The pressure exerted on the containing vessel increases as a result of the increase in the number of molecules colliding with the wall.