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maks197457 [2]
3 years ago
8

How many moles are in 2.3 grams of phosphorus?

Chemistry
2 answers:
GarryVolchara [31]3 years ago
8 0
<em>The Molecular Mass for Phosphorus is 31 grames / mole.

So, 31g. P.....................1 mole
2.3g. P ..........................x mole

</em>x= \frac{2,3}{31} = \boxed {0,07}  \hbox { moles }<em>
</em>
MissTica3 years ago
6 0
1.Molar mass of phos.=30.97g/mol

2.n=m/M
     =2.3g/30.97g/mol
     =0.07mol

3. therefore the amount of moles in 2.3g of phosphorus is 0.07mol
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How many magnesium atoms are contained in 3.75 moles of magnesium?
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In 1 mole of magnesium there are Avogadro's number of atoms are present.
Avogadro's number = 6.023 x 10²³ 
1 mole = 6.023 x 10²³ atoms
3.75 moles = 3.75 x 6.023 x 10²³ 
=2.26 x 10²⁴
So, in 3.75 moles of magnesium there are 2.26 x 10²⁴ atoms of magnesium are present.
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4 years ago
A mutation produces a bright Orange moth in the population of green moths. The moths live ia a green forest would this mutation
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Hope this helps:)
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Geologically, the Himalayan mountain range is one of the youngest mountain ranges on Earth. It has nine of the ten highest peaks
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3 years ago
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Amylose is a form of starch which has ________. only β-1,4-bonds between glucose units only α-1,4-links bonds glucose units hemi
forsale [732]

Answer: Amylose is a form of starch which has only α-1,4-links bonds glucose units.

Explanation:

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4 years ago
Calculate the pOH of an aqueous solution of .0.073 M LiOH
Novosadov [1.4K]

Considering the definition of pOH and strong base, the pOH of the aqueous solution is 1.14

The pOH (or potential OH) is a measure of the basicity or alkalinity of a solution and indicates the concentration of ion hydroxide (OH-).

pOH is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

On the other hand, a strong base is that base that in an aqueous solution completely dissociates between the cation and OH-.

LiOH is a strong base, so the concentration of the hydroxide will be equal to the concentration of OH-. This is:

[LiOH]= [OH-]= 0.073 M

Replacing in the definition of pOH:

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<u><em>pOH= 1.14 </em></u>

In summary, the pOH of the aqueous solution is 1.14

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