The formula of work is Work (Joules)=Force (Newtons) · distance in the direction of the force (meters), therefore its just a matter of replacing factors.
Work done = 12 · 4.5= 54 joules
Answer:
moles of calcium hydroxide= 21.75 mol
a) 43.5 mol
b) 7.25 mol
Explanation:
Please see the attached picture for the full solution.
First off, you must realize that the phase changes are marked by the points B and D on the graph. They are level because all of the energy (or heat) being added is being consumed by the physical process. So The temperature is increasing before the phase change, and after the phase change. The moments before and after are represented by points A, C, and E.
The air is too "rich" to burn above the upper limit, but the situation might soon deteriorate into danger: For instance, increasing the air in a space can quickly reduce the product's vapor percentage to levels that are within its flammability range, which could have explosive effects.
<h3>Why should we handle combustible materials carefully?</h3>
Flammable liquids and gases need to be handled and stored carefully since they have low flash points. Never assume that these items won't catch fire. You must continually keep in mind the safety precautions for handling and storing combustible products if you want to keep both you and your company safe.
<h3>What must be kept out of the vicinity of combustible chemicals?</h3>
To prevent them from getting engaged and stoking a fire, combustible objects including cardboard, paper towels, sawdust, and waste must be kept away from flammable storage spaces. All flammable liquid containers must be kept closed while not in use to further help avoid fires.
learn more about flammable chemical here
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The answer is 9.03 × 10²⁴ molecules of oxygen!
- <u>Step 1</u> 6.02 × 10²³ molecules : 1 mol = x : 15 mol
- <u>Step 2</u> x = 6.02 × 10²³ molecules * 15 mol * 1 mol
- <u>Step 3</u><em> </em> x = 90.3 × 10²³ molecules
- <u>Step 4</u> x = 9.03 × 10 × 10²³ molecules
- <u>Step 5</u> x = 9.03 × 10²³⁺¹ molecules
- <u>Step 6</u> { x = 9.03 × 10²⁴ molecules }
