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dolphi86 [110]
3 years ago
10

What is the number of cations is present in 1.17 g of sodium chloride? Given Na=6*10power 23 mol

Chemistry
2 answers:
SpyIntel [72]3 years ago
6 0

Answer:

1.21x10^{22}cationsNa^+

Explanation:

Hello,

In this case, one knows that sodium chloride's formula is NaCl, therefore, the amount of cations is computed via the following stoichiometric relationship, considering the Avogadro's number to relate moles of sodium cations with their actual amount:

1.17gNaCl*\frac{1molNaCl}{58.45gNaCl}*\frac{1molNa^+}{1molNaCl}*  \frac{6.022x10^{23}cationsNa^+}{1molNa^+} =1.21x10^{22}cationsNa^+

Best regards.

natita [175]3 years ago
5 0
1.17×6×1023 Wich equals 7.02×1023 Your final answer is 7.02×1023
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Answer:

The first one.

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Explanation:

When comparing two fractions with variables like this, it's important to get to the same denominator in order to compare apples with apples and then be able to do not only comparisons but also perform additions/subtractions.

Question is which denominator to use and how to reach it.

In this case, the question and the answer choices do the work for you.  The question asks which one is the LEAST common denominator, and the answers show denominators x² and 4x².  The smallest of these is x², however, we can't simplify the first fraction to get to the x² denominator, so we'll go for the 4x².

So, the first fraction has already the correct denominator (4x²), we just have to transform the second one.

We multiply it by 1, expressed in a different way.  Since we're multiplying by one, we're not affecting the value, just the way it looks.

Let's do it!, to get the denominator to go from x² to 4x², we need to multiply it by 4... so we'll multiply by 4/4 (which is 1, neutral for the multiplication).

\frac{x + 1}{x^{2} } * \frac{4}{4} = \frac{4(x + 1)}{4x^{2} }

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3 years ago
Calculate the distance that a man walked if it took him 42 seconds to walk at a speed of 3m/s.
Hitman42 [59]

Answer:

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3 years ago
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Explanation:

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If x=0 then y=0 sorry dude I wish I could
Help but I’m dumb and I just want points but I’d defiantly recommend to look this up on safari or go into school and seek help
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