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4 years ago

How many electrons does phosphorus need to gain to have a stable outer electron shell

Chemistry

2 answers:

olga2289 [7]4 years ago

7 0

Answer:

Explanation:

Phosphorous valence is 5. so to get stable electronic configuration it has to gain 3 more electrons to its outer shell

Sphinxa [80]4 years ago

7 0

Answer:

Explanation:

luckily, every phosphorus atom is looking to gain 3 electrons. It's a perfect match. But something to notice though, look how they have a bond with six electrons. That is called triple bond.

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A student makes a sound by blowing into the mouth of an empty soda bottle. How could the student make the sound louder?

Alja [10]

Answer:

Increase the amplitude by blowing with more force.

Explanation: I answered this.

5 0

3 years ago

5. How many grams of cobalt are in 1.52 x 1024 atoms of cobalt?

klasskru [66]

149 g of cobalt are present in 1.52 x $10^{24}$ atoms of cobalt.

<u>Explanation</u>:

One mole of an atom is equal to the Avagadro number of the atom.

$1 \ mol \ of \ Co = 6.023\times10^{23} atoms\ of \ Co$

The number of atoms per mol is divided by the given atoms of Cobalt.

= $(1.52 \times 10^{24}) \times$ $\frac{1 \ mol\ Co}{6.023 \times10^{23}\ atoms\ Co}$

= 2.52 mol of Co

To covert, the moles into grams multiply the mole value by its molar mass

The Molar mass of Cobalt is 58.93

= 2.52 $\times$ 58.93

= 149 g.

6 0

3 years ago

Please this is important

ValentinkaMS [17]

Answer:

Explanation:

2C6H6 + 9O2 -> 12CO2 + 6H20

Weight of a CO2 Mol 12+ 16x2 = 44g

In 100g number of moles = 100/44= 2.2727 Moles

Number of C6H6 2moles burned when creating 12 moles of CO2

Therefore 2.2727/12 x 2 = 0.3787

3H2SO4 + 2Al(OH)3 -> Al2(SO4)3 + 6H2O

H2O weight of a 1mol is = 2+16 = 18g

2moles of Al(OH)3 cerates 6 moles of water.

3moles of sulfuric creates 6 moles of water.

5.5moles Al(OH)3 reacts with 5.5 moles of sulfuric

Therefore number of water moles = 5.5/3 x 6 = 11moles

Weight water = 11 x 18 = 198g

Cu + 2AgNO3 -> 2Ag + Cu(NO3)2

1mol of Cu produces 2moles of silver

Ag = 107.86 g/Mol

Cu = 63.54 g/Mol

In 26g Ag number of moles = (26/107.86)/2 x 63.54 = 7.658g

3K2CrO4 + 2AlPO4 -> 2K3PO4 + Al2(CrO4)3

K2CrO4 = 39x2 + 52 + 16x4 = 194g/Mol

Al2(CrO4)3 = 54 + 354 = 408g/Mol

3moles of K2CrO4 creates 1mol of Al2(CrO4)3

Therefore weight of the Al2(CrO4)3 produced by 17.5g potassium chromate

(17.5/194)/3 moles of Al2(CrO4)3 produced = 0.03moles

Al2(CrO4)3 produced = 0.03 x 408 = 12.26g

7 0

3 years ago

Right now it is soluble. that's why it is dissolved in the water. which of the following can I add to make it soluble

Arisa [49]

Answer:

Barium nitrate or silver nitrate based on the anion our solute contains

Explanation:

I assume the situation is that currently the solute is soluble in water and you wish to make it insoluble.

It really depends on the soluble material you have, however, let's look at some specific cases.

We have a salt in our solution. Addition of any of the three reagents will produce a double displacement reaction, that is, our cation will be replaced by another cation, either sodium, barium or silver cation.
According to the solubility rules, all sodium salts are soluble, so sodium nitrate won't precipitate our anion.
In case our solute contains sulfate, carbonate or phosphate, we may use barium nitrate to precipitate it, as barium sulfate, barium carbonate and barium phosphate are insoluble.
In case our solute contains chloride, then silver nitrate is the way to go to precipitate it in an insoluble form of AgCl. Similarly, silver would form precipitates with carbonate, phosphate, iodide, bromide and slightly soluble silver sulfate (barium is the choice for sulfate, however).

7 0

3 years ago

What's the Cation and Anion of Fe2(SO4)3

Whitepunk [10]

Cation is Fe^+2 and anion is SO4^-2

7 0

3 years ago

Read 2 more answers