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Viefleur [7K]
3 years ago
11

Answer 23 please....

Chemistry
1 answer:
marishachu [46]3 years ago
7 0
The answer is 10. Each capital letter is an atom. The tiny numbers represent how many atoms of that type
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1.4g of calcium oxide obtained by heating limestone was found to contain 0.4g of oxygen.another sample of 3.5g of calcium oxide
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Answer:

Solution

1.4 gm of CaO⟶n0.4 gm of Oxygen

1.0 gm of O2⟶3.5 gm of Ca

According to the law of definite proportions

n/m=y/x

⇒1.4/0.4=3.5.

⇒3.5=3.5

Explanation:

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ValentinkaMS [17]
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What are the positive and negative affects of altering the DNA of a plant cell?
Marianna [84]

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3 years ago
How many moles of potassium hydroxide are needed to completely react with 2.94 moles of aluminum sulfate according to the follow
fiasKO [112]

Answer:- Third choice is correct, 17.6 moles

Solution:- The given balanced equation is:

Al_2(SO_4)_3+6KOH\rightarrow 2Al(OH)_3+3K_2SO_4

We are asked to calculate the moles of potassium hydroxide needed to completely react with 2.94 moles of aluminium sulfate.

From the balanced equation, there is 1:6 mol ratio between aluminium sulfate and potassium hydroxide.

It is a simple mole to mole conversion problem. We solve it using dimensional set up as:

2.94molAl_2(SO_4)_3(\frac{6molKOH}{1molAl_2(SO_4)_3})

= 17.6 mol KOH

So, Third choice is correct, 17.6 moles of potassium hydroxide are required to react with 2.94 moles of aluminium sulfate.


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4 years ago
In terms of shape and volume, how can a gas be defined ?
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