How many lone pairs of electrons are represented in the Lewis structure of a phosphate ion (PO43-)? 10 12 21 24

Answers

Answer 1

Answer: To illustrate the Lewis structure,
P has 5 valence electrons
O has 6 valence electrons (each for 4 oxygen)
And finally, for every negative charge, there is an additional valence electron

We should add these all up = 5 + 24 + 3 = 32 valence electrons

With this, we can be guided to illustrate the lewis structure as P as central atom and the 3 oxygen each with a single bond with P and 1 oxygen with a double bond with P. We place the valence electrons until octet rule is satisfied,
we will be left with 12 lone pairs for phosphate ion.

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The solubility of KCLO3 (s) in water increases as the.....

Answers

The solubility of potassium chlorate (KCLO3) increases as the temperature increase. The increase in temperature is only applicable for most ionic and molecular solids. Since potassium chlorate is an ionic compound, this rule applies to it. The solubility however of other substance such as NaCl doesn’t change when you increase its temperature.

How to name alkane using iupac system

Answers

Naming an alkane through the IUPAC system is pretty simple
so all it is is (prefix for number of carbon) + ane
For the first four in this homologous series you have
Meth- 1 carbon
Eth- 2 carbons
Pro- 3 carbons
But- 4 Carbons
Onward you use the prefixes you know such as Pent, Hex, Hept, Oct, Non, Dec

So for an alkane with 3 Carbons it would be Propane, with 4 - Butane with 8- Octane etc.

chlorine and element x have similar chemical properties an atom of element x could have an electron configuration of

Answers

It could possibly have one very similar to Cl and be
$[Ne]3s^(2)3p^(5)$

An atom is determined to contain 12 protons, 10 electrons, and 12 neutrons. What are the mass number and charge of this atom or ion? Select one:
a. mass number: 24, charge: +2
b. mass number: 22, charge: neutral
c. mass number: 34, charge: -2
d. mass number: 34, charge: +2

Answers

The mass mass number is 22 and the charge of the atom is +2. The correct answer is option A

How to determine the mass number and charge?

1. The mass number of the atom can be obtained as follow:

Number of protons = 12
Number of neutrons = 12
Mass number =?

Mass number = number of proton + number of neutron

= 12 + 12

= 24

2. The charge of the atom can be obtained as follow:

Number of protons = 12
Number of electrons = 10
Charge =?

Charge = number of protons - number of electrons

= 12 - 10

= +2

Thus, the mass number is 24 and the charge is +2. The correct answer to the question is option A

Learn more about mass number:

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Mass number= atomic number + number of neutrons.
A=Z+N
Z=number of protons=12
N=12

A=12+12=24

If, we have 12 protons and 10 electrons, the charge of this ion is +2

Therefore: mass number:24; charge: +2

Answer: a. mass number: 24; charge: +2

C2H5OH is able to dissociate in water to conduct an electric current. This compound could be classified as

Answers

The fact that when in solution C₂H₅OH conducts electricity means that it is an electrolyte so you can automatically cross out A and C (the definition of an electrolyte is a substance that will conduct electricity when in a solution). I think the correct answer is B due to the -OH group (the - indicates a covalent bond) which allows the molecule to give up a proton (H⁺).
I hope this helps. Let me know if anything is unclear.

A gas is heated from 298 K to 367 K while its volume changes from 2.5 L to 3.9 L. If the initial pressure of the gas is 1.1 atm, what is the final pressure of the gas?

Answers

PV=nRT, .85atm
If the volume goes up, the pressure goes down.

Answer:

0.87

Explanation:

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