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4 years ago

How might a theory relate to a model

1 answer:

8 0

These are related but can be independent, because it is possible to, the theories are studied in mathematical logic, especially in model theory

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Where are metals atoms located on the periodic table? where are non-metal atoms located on the periodic table?

weeeeeb [17]

Metals atoms are located on group 1 & 2 while non- metals atom on group 4 to 8

7 0

3 years ago

A simple way to estimate whether a molecule is a strong electrolyte, a weak electrolyte, or a nonelectrolyte is to examine an eq

borishaifa [10]

Answer:

Explanation:

We classify the behaviours of electrolytes based on their electrolytic conduction. This is what makes them breaks down when in aqueous solutions with water.

A strong electrolyte is one that ionize completely when in aqueous solutions. Their ionization can be shown below using appropriate chemical notation:

An example of a strong electrolyte is NaCl:

NaCl $_{aq}$ → Na⁺ $_{aq}$ + Cl⁻ $_{aq}$

Such reactions have a single forward arrow. Since they ionize complete, they have a large amoung of ions present in their aqueous form and would readily conduct.

A weak electrolyte is made up of compounds that ionize partially or slightly in their aqueous solution. The amount of ions produced per mole of compounds is relatively small compared to those of strong electrolytes. Examples ae organic acids, weak bases, and water. This ionization is shown below for methanoic acid:

HCOOH $_{aq}$ ⇄ HCOO⁻ $_{aq}$ + H⁺ $_{aq}$

This sort of reaction is an equilibrium reaction. This is why we have the double arrow.

None electrolytes do not ionize at all in aqueous solutions and they produce no ions.

3 0

3 years ago

Read 2 more answers

Determine the oxidation states of the elements in the compounds listed. None of the oxygen-containing compounds are peroxides or

Ahat [919]

Answer :

Oxidation number or oxidation state : It represent the number of electrons lost or gained by the atoms of an element in a compound.

Oxidation numbers are generally written with the sign (+) and (-) first and then the magnitude.

Rules for Oxidation Numbers are :

The oxidation number of a free element is always zero.
The oxidation number of a monatomic ion equals the charge of the ion.
The oxidation number of Hydrogen (H) is +1, but it is -1 in when combined with less electronegative elements.
The oxidation number of oxygen (O) in compounds is usually -2.
The oxidation number of a Group 17 element in a binary compound is -1.
The sum of the oxidation numbers of all of the atoms in a neutral compound is zero.
The sum of the oxidation numbers in a polyatomic ion is equal to the charge of the ion.

Now we have to determine the oxidation state of the elements in the compound.

(a) $H_2SO_4$

Let the oxidation state of 'S' be, 'x'

$2(+1)+x+4(-2)=0\\\\x=+6$

Hence, the oxidation state of 'S' is, (+6)

(b) $Ca(OH)_2$

Let the oxidation state of 'Ca' be, 'x'

$x+2(-2+1)=0\\\\x=+2$

Hence, the oxidation state of 'Ca' is, (+2)

(c) $BrOH$

Let the oxidation state of 'Br' be, 'x'

$x+(-2)+1=0\\\\x=+1$

Hence, the oxidation state of 'Br' is, (+1)

(d) $ClNO_2$

Let the oxidation state of 'N' be, 'x'

$-1+x+2(-2)=0\\\\x=+5$

Hence, the oxidation state of 'N' is, (+5)

(e) $TiCl_4$

Let the oxidation state of 'Ti' be, 'x'

$x+4(-1)=0\\\\x=+4$

Hence, the oxidation state of 'Ti' is, (+4)

(f) $NaH$

Let the oxidation state of 'Na' be, 'x'

$x+(-1)=0\\\\x=+1$

Hence, the oxidation state of 'Na' is, (+1)

4 0

3 years ago

Phenolphthalein solution is used as an indicator of acids and bases. If added to an ammonia-based solution of window cleaner, we

77julia77 [94]

C.) pink In a base, with a pH> 8.2, we would expect the indicator to turn pink. Phenolphthalein is colorless in an acidic or neutral solution; it turns from pink to fuchsia in a basic solution. Cleaners and products containing soaps, are bases.

8 0

3 years ago

Read 2 more answers

Put the elements in order from easiest to hardest to remove an electron. Ba,Be,Ca,Sr.

laiz [17]

Answer:

Ba,Sr,Ca,Be

Explanation:

as atomic size increases ionisation potential decreases

8 0

3 years ago