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Mrac [35]
3 years ago
14

A reaction produces .815 moles of H2O. How many molecules produces?

Chemistry
2 answers:
Vera_Pavlovna [14]3 years ago
8 0
To find out the number of water molecules produced simply use Avogadro’s constant, where 1 mol of any compound is equal to 6.02 x 10^23 molecules of the substance.

Multiply 0.815 to this value.







JulijaS [17]3 years ago
5 0

Answer:

The reaction produces 4.91 x 10²³ molecules of H₂O.

Explanation:

Remember first the meaning of "mol". A mol always represents the amount of particles equal to 6.022 x 10²³, which is called Avogadro's number.

For example: If we have 1 mol of books that means that we have 6.022 x 10²³ books which is the same as 602200000000000000000000 books (a huge amount of books!)

Now, let's analyze the problem:

- H₂O is <u>a molecule of water</u>, and to know how many molecules are in 0.815 <u>moles of water</u>, it is necessary to use the Avogadro's number.

- To solve this problem we have to think about the relation between the Avogadro's number and the number of moles so we use the "Rule of three" thinking that: if <u>1 mole of water</u> has <u>6.022 x 10²³ molecules of water</u>, the <u>0.815 moles of water</u> that we have, will be the result of multiplying 0.815 by 6.022 x 10²³ and dividing that result by one.

- After applying the Rule of three, we finf that the reaction produces <u>4.91 x 10²³ molecules of water</u>.

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3 years ago
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According to the octet rule, which of elements will have a tendency to loss 2 electrons?
Aneli [31]
The correct option is STRONTIUM.
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5 0
3 years ago
Does anyone know how to do this?
Sloan [31]

Answer

find out the number of moles and use the molar ratio (numbers in front of formulas (in this case they are all 1) to determine how many moles of each product you are going to get theoretically

n=m/M is the equation to use to get moles here

30.8 gm/32.04 g/mol=0.9612 moles of the methanol and also of the formaldehyde so

0.9612 moles of the formaldehyde x molar mass (M) 30.73 g/mol= 29.54 gm which is the theoretical yield you already have the actual yield of 24.7 gm

then divide the actual by the theoretical to get the % yield which is 83.6%

Explanation:

4 0
3 years ago
What is the charge on the phosphorus atom in the polyatomic ion: PO4-3
oee [108]

+5

Explanation:

  The given radical is                 PO₄³⁻

To solve this problem, we need to understand what oxidation number entails.

The extent of the oxidation of each atom is expressed by the oxidation number.

Here are some rules for assigning them:

  • Elements in an uncombined state or elements that combines with one another, their oxidation number is zero.
  • The charge on an ion is its oxidation number
  • In an neutral compound, algebraic sum of all the oxidation numbers of all atoms is zero.
  • In a radical, the algebraic sum of all the oxidation numbers of the ions is equal to the charge on them.

Oxygen is known to have an oxidation number of -2;

                       

                          PO₄³⁻

 P + 4(-2) = -3

 P -8 = -3

  P = -3 + 8 = +5

The charge on phosphorus is +5

learn more:

Oxidation number brainly.com/question/2086855

#learnwithbrainly

3 0
3 years ago
SOMEONE PLEASE HELPPP​
xxTIMURxx [149]
A is the correct awnser Beacuse it ether right kne
5 0
3 years ago
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