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Sergeu [11.5K]
3 years ago
12

A device that does work with only one movement and changes the size or direction of a force is a(n) ____.

Chemistry
1 answer:
worty [1.4K]3 years ago
6 0

Answer:

A device that does work with only one movement and changes the size or direction of a force is a simple machine.

Explanation:

  • For applying force, any used basic mechanical devices are simple machines.
  • Simple machine changes the direction as well as the amplitude of the applied force i.e. we can increase or decrease the magnitude of the force.
  • A simple machine is the most basic mechanism to use the force as we need in big mechanical machines.
  • Some of the examples of simple machines are inclined plane, lever, wedge, wheel and axle, pulley, and screw.
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What is the percent yield of O2 if 10.2 g of O2 is produced from the decomposition of 17.0 g of H2O?
yawa3891 [41]

The balanced chemical reaction will be:

2H2O = 2H2 + O2

<span>We are given the amount of water used in the decomposition reaction. This will be our starting point.</span>

<span>17.0 g H2O</span> (1 mol  H2O/ 18.02 g H2O) (1 mol O2/2 mol <span>H2O</span>) ( 32.00 g O2/1mol O2) = 15.09 g O2

Percent yield = actual yield / theoretical yield x 100

<span>Percent yield =10.2 g / 15.09  g x 100</span>

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3 years ago
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Aleksandr-060686 [28]

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Olenka [21]
1) Write the balaced chemical equation:

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Answer: 14 moles 

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Need help plz help any one
dimulka [17.4K]
Hi!

Composition: the way in which a whole is made up

Hope I helped!
Have a nice day!
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