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Maurinko [17]
3 years ago
7

Please help, How many molecules does 20.0 grams of C8H8 represent?

Chemistry
1 answer:
Igoryamba3 years ago
4 0

Explanation:

Hope u can understand my handwriting:)

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dimaraw [331]
First read the introduction.

Seconds look at the pictures how to build it.
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3 years ago
Consider a 400 mL solution of 0.10 M \ce{NaOH}NaOH. Calculate the mass of solid \ce{NaOH}NaOH required to achieve this solution.
AnnyKZ [126]

Answer:

Is 40.10 ml

Explanation:

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2 years ago
Identify the mole ratio of water to sodium metal? Determine the number of moles of Sodium that reacted and determine the number
frozen [14]

Number of moles of sodium reacted is 2 moles. 0.04598 Kg is the mass of sodium that reacted.

Mole fraction is 1 mole ratio is 1:1

Explanation:

Balanced chemical reaction:

2 Na + 2H20 ⇒ 2NaOH + H2 (gas)

atomic mass of sodium = 22.99 g/mol

from the reaction it can be seen that 2 moles of sodium reacted to form 2 moles of sodium hydroxide soluition.

The mass of sodium reacted can be calculated from the formula:

mass = atomic mass of one mole x number of moles

mass = 22.99 x 2

         = 45.98 grams is the mass of sodium, to convert it into kilograms it is divided by 1000

= 0.04598 Kg is the mass of sodium that reacted.

Mole fraction formula is:

\frac{moles of solute}{moles of solution} = mole fraction   ( solute Na = 2 moles, solution is NaOH =2 moles)

putting the values:

\frac{2}{2}

= 1 mole ratio is 1:1

7 0
2 years ago
How can you tell the difference between an element and a compound
castortr0y [4]

Explanation:

An Element is one and a compound is more than 2elements

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2 years ago
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True or false: the moon is the same size as the sun.
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Answer:

false

Explanation:

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