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hodyreva [135]
3 years ago
14

How many atoms are present in 179.0 g of iridium

Chemistry
1 answer:
nika2105 [10]3 years ago
8 0
<span>Avogadro's number represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. This number can be used to convert the number of atoms or molecules into number of moles. We do as follows:

 </span>179.0 g of iridium (1 mol / 192.217 g) ( 6.022 x 10^23 atoms /  1 mol ) = 5.61 x 10^23 atoms of iridium 

Hope this answers the question.
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The correct option is C.
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2 years ago
cetylene gas is often used in welding torches because of the very high heat produced when it reacts with oxygen gas, producing c
Bingel [31]

Answer:

0.60 mol

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There is some info missing. I think this is the original question.

<em>Acetylene gas is often used in welding torches because of the very high heat produced when it reacts with oxygen gas, producing carbon dioxide gas and water vapor. Calculate the moles of oxygen needed to produce 1.5 mol of water.</em>

<em />

Step 1: Given data

Moles of water required: 1.5 mol

Step 2: Write the balanced equation

C₂H₂(g) + 2.5 O₂(g) ⇒ 2 CO₂(g) + H₂O(g)

Step 3: Calculate the moles of oxygen needed to produce 1.5 mol of water

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6 0
3 years ago
Which sentence contains a double negative?
wlad13 [49]
<h2>Answer:</h2>

She never danced with nobody.

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The double negative is intended to convey to the reader a negative sentiment while emphasizing and reinforcing that notion. The double negative may be seen in sentences that include two words that have a negative connotation yet are in perfect harmony with the other words in the phrase as well as with the sentences' coenrency and cohesiveness.

There are two negative terms in the sentence "She never danced with nobody." These are the words "never" and "nobody," which are perfectly in sync with the rest of the sentence's components. So, here's an excellent example of a double negative statement.

#SPJ1

6 0
2 years ago
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