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8_murik_8 [283]
3 years ago
8

What is the empirical formula for a compound if a sample contains 3.72 g of P and 21.28 g of Cl?

Chemistry
1 answer:
Ainat [17]3 years ago
4 0
Given 3.72 g of P and 21.28g of Cl, converting these to moles: ( 3.72 g P)(mol P/30.97 g P) = 0.12 mol P (21.28 g Cl)(mol Cl/35.45 g Cl) = 0.60 mol Cl P:Cl = 0.12/0.60, therefore P: Cl =1/5 Therefore, PCl5                                                      hope it helps

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All forces require an input of ______<br><br> - mass<br> - energy<br> - speed<br> - atoms
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A helium balloon is filled on the ground where the atmospheric pressure is 768 torr. The volume of the balloon is 8.00 m3. When
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The correct option is: <u>B. 366 torr</u>

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A student is instructed to make 1 L of a 2.0 M solution of CaCl2 using dry salt. How should he do this?
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1. First he should calculate the number of moles of 2.0 M CaCl</span></span>₂ in 1 L solution.<span>

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Hence, number of moles in 1 L = 2 mol

2. Find out the mass of dry CaCl</span>₂ in 2 moles.<span>

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3. Weigh the mass accurately 

4. Then take a cleaned and dry1 L volumetric flask and place a funnel top of it. Then carefully add the salt into the volumetric flask and finally wash the funnel and watch glass with de-ionized water. That water also should be added into the volumetric flask.

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<span>6. Then top up to mark of the volumetric flask carefully. 
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</span>
7. As the final step prepared solution should be labelled.
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