![adejumoayobami1](/avatars/18016.jpg)
adejumoayobami1
28.06.2019 •
Chemistry
How friction reduces the efficiency of machines
Solved
Show answers
More tips
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
- F Food and Cooking How many stages of coffee roasting are there?...
- F Food and Cooking From Latte to Espresso: Which Coffee Drink is the Most Popular on Earth?...
- F Food and Cooking Experts Name Top 5 Healthiest Teas...
- C Computers and Internet Google Search Tips and Tricks: Everything You Need to Know...
- H Health and Medicine Discover the Hidden Principles and Real Results of the Japanese Diet...
- H Health and Medicine Liver Cleansing - Rejuvenation for the Body?...
- S Style and Beauty Is Photoepilation the Solution to Unwanted Hair Forever?...
- S Style and Beauty Unbelievable Hairstyles for Long Hair - 2021 Trends...
- H Health and Medicine When can it be said that a person has a normal pulse?...
Answers on questions: Chemistry
- C Chemistry Which reaction will most likely take place?...
- M Mathematics Disney held a breakfast for parents and their children to eat with Mickey Mouse. Adult tickets cost $17.95 and children tickets cost $12.95. Disney made $7,355 in ticket sales from...
- L Law Assume that you believe you have suffered a legally-recognizable wrong. you are considering filing a lawsuit. what factors should you consider as you are deciding whether to pursue...
- M Mathematics assume a box contains 7 balls. 3 blue, 3 white and 1 yellow. balls are drawn in succession without replacement and their colors are noted until both a blue and white ball have been...
- M Mathematics An object that weighs 1 pound on earth weighs only 0.17 pound on the moon. zach s dog weighs 17.5 pounds on earth. how much more does his dog weigh on earth than on the moon?...
Ответ:
Hello,
Work is done when a force causes an object to move in the same direction that the force is applied Friction reduces efficiency because when two surfaces slide past each other, friction resists their motion, and in real machines, some input work is always used to overcome friction.
Hope this helps (:
Ответ:
pOH = 14 - 4.22 =9.78
Kb of aniline = 4.0 x 10^-10
pKb = 9.40
9.78 = 9.40 + log [C6H5NH3+] / 0.37
10^0.38= 2.40 = [C6H5NH3+]/ 0.37
[C6H5NH3+]= 0.89 M
moles aniline = 0.37 M x 1 L = 0.37
moles anilinium = 0.89 x 1 L = 0.89
moles NaOH = 4.6 g / 40 g/mol=0.12
C6H5NH3+ + OH- >> C6H5NH2 + H2O
moles anilinium = 0.89 - 0.12 =0.77
moles aniline = 0.37 + 0.12 = 0.49
pOH = 9.40 + log 0.77/ 0.49=9.60
pH = 4.40
Explanation: