![rubincain698](/avatars/5809.jpg)
rubincain698
04.10.2021 •
Chemistry
Give the mass percent of nitrogen in C14H19NO2.
Solved
Show answers
More tips
- C Computers and Internet Best Applications for Your iPad: Review of the Best Candidates for Installation...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
- A Art and Culture When Will Eurovision 2011 Take Place?...
- S Style and Beauty How to Choose the Perfect Hair Straightener?...
- F Family and Home Why Having Pets at Home is Good for Your Health...
- H Health and Medicine How to perform artificial respiration?...
- H Health and Medicine 10 Tips for Avoiding Vitamin Deficiency...
- F Food and Cooking How to Properly Cook Buckwheat?...
- F Food and Cooking How Many Grams Are In a Tablespoon?...
- L Leisure and Entertainment Carving: History and Techniques for Creating Vegetable and Fruit Decorations...
Answers on questions: Chemistry
- C Chemistry What is the ph at the point of neutralization when 25.00 ml of 0.1000 molar acetic acid (ka = 1.8 x 10-5) reacts with 25.00 ml of 0.1000 molar sodium hydroxide?...
- C Chemistry The ph of a 0.150 molar solution of a weak acid is 4.10. what is the pka of the acid?...
- C Chemistry 1. (05.03 LC) What is the empirical formula of C3H1608? (4 points) CH202 C₂H4O2 CH20 CHO...
- C Chemistry Which isoelectronic series is correctly arranged in order of increasing radius? A) Ca^2+ Ar K+ Cl^- B) Ca^2+ K^+ Ar Cl^- C) Ca^2+ K^+ Cl^- Ar D) K^+ Ca^2+ Ar Cl^- E) Cl^- Ar...
- C Chemistry 4. Hot material in the Earth s mantle rises and cool material sinks. This is an example of a. conduction b. convection c. radiation d. none of these...
- C Chemistry Im going to do a face reveal...
- C Chemistry Determine the number of grams of nacl necessary to make up 100 ml of a 0.10 m solution. 0.017 g 0.58 g 1.7 g 58 g...
- C Chemistry The recommended daily calcium i take for a woman over 50 years of age is 1200 mg. if one cup of milk has 306mg of calcium how many cups of milk provide this amount of calcium?...
- C Chemistry All of the following are a source of carbon in the carbon cycle except: sunlight sediment animals fossil fuels...
- C Chemistry Drag the tiles to the correct locations. Each tile can be used more than once, but not all tiles will be used. Some locations will remain empty. Chloramine has the chemical...
Ответ:
The mass percent of carbon in C₁₄H₁₉NO₂ is 72.1%.
Explanation:
To calculate the mass percent of carbon in C₁₄H₁₉NO₂ we have to follow two simple steps:
1st) Look for the atomic weight of each element in the Periodic Table and then multiply each one by its subscript in the molecule and finally sum all of them to find the molar weight of the molecule:
Carbon atomic weight . Carbon subscript = 12 . 14 = 168g
Hydrogen atomic weight . Hydrogen subscript = 1 . 19 = 19g
Nitrogen atomic weight . Nitrogen subscript = 14 . 1 = 14g
Oxygen atomic weight . Oxygen subscript = 16 . 2 = 32g
The molar weight of C₁₄H₁₉NO₂ is: 168g + 19g + 14g +32g = 233g.
2nd) Find the mass percent of carbon with a Rule of three:
If 233g represents the 100% of mass, the 168g of carbon in the molecule will represents the 72.1% of mass.
The Rule of three is:
233g 100%
168g = (168 . 100)/233 = 72.1% mass of carbon.
Ответ:
D
Step-by-step explanation:
10*20=200
200 + 1020= 1220
Works for the first one
20*20=400
400+ 1020=1420
Works for the second one
30*20=600
600+1020=1620
Works for the third one, and all the others one so forth.
You take the number on the left (10, 20, 30, 40, 50, 60, 70) and times it by 20, replacing the x in the equation with the number on the left side of the table. Then you add the number from said equation to result of the multiplication from the first step.