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photoshop1234 [79]
3 years ago
8

HELP MEEEE ASAP PLEASEEEE !!!!!!!!

Chemistry
1 answer:
jasenka [17]3 years ago
5 0

Ok, I will help you answer but it is very hard to read could you enlarge it first?

Thanks!

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What volume of oxygen gas is released at STP if 10.0 g of potassium chlorate is decomposed? (The molar mass of KClO3 is 122.55 g
ArbitrLikvidat [17]
<span>KCl<span>O3</span><span>(s)</span>+Δ→KCl<span>(s)</span>+<span>32</span><span>O2</span><span>(g)</span></span>

Approx. <span>3L</span> of dioxygen gas will be evolved.

Explanation:

We assume that the reaction as written proceeds quantitatively.

Moles of <span>KCl<span>O3</span><span>(s)</span></span> = <span><span>10.0⋅g</span><span>122.55⋅g⋅mo<span>l<span>−1</span></span></span></span> = <span>0.0816⋅mol</span>

And thus <span><span>32</span>×0.0816⋅mol</span> dioxygen are produced, i.e. <span>0.122⋅mol</span>.

At STP, an Ideal Gas occupies a volume of <span>22.4⋅L⋅mo<span>l<span>−1</span></span></span>.

And thus, volume of gas produced = <span>22.4⋅L⋅mo<span>l<span>−1</span></span>×0.0816⋅mol≅3L</span>

Note that this reaction would not work well without catalysis, typically <span>Mn<span>O2</span></span>.


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3 years ago
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In the morning a student puts a warm soda in a ice filled cooler.
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basically all of the molecules in the can of soda started to stop moving due to the compression and change of temperature. the ice had frozen the molecules and which then made the can of soda nice and cold lol

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What is a Cilla ? What does it look like ? (In drawing )
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a short microscopic hairlike vibrating structure found in large numbers on the surface of certain cells.

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either causing currents in the surrounding fluid, or, in some protozoans and other small organisms, providing propulsion.

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Which method of heat transfer is due to the transfer of kinetic energy from one molecule to another?
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Answer: Conduction

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