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lisabon 2012 [21]
3 years ago
12

What equation do you use to go from mass to mole?

Chemistry
1 answer:
liq [111]3 years ago
5 0

Answer:

Number of moles = mass/molar mass

Explanation:

Given data:

mass of Al = 11 g

Moles = ?

Solution:

Formula:

Number of moles = mass/molar mass

Molar mass of aluminium is 27 g/mol

Now we will put the values in formula.

Number of moles = 11 g/ 27 g/mol

Number of moles = 0.41

The number of moles in 11 g Al are 0.41 mol.

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Make more of, make it higher
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3 years ago
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he solution is said to be an ideal solution, only when the intermolecular forces of attraction between A-A, B- B and A- B are ne
KengaRu [80]

Answer:True

Explanation:

A ideal solution is a solution which obeys Raoults law on almost every concentration and temperature range.

Ideal solutions are formed by mixing those solute and solvent which has identical molecular properties.

Lets take A be the solute and B be the solvent  so to form a ideal solution from these components the solute-solute(A-A) molecular interaction and  solvent -solvent (B-B) molecular interactions must be identical with the solute solvent interaction(A-B).

The solute-solute molecular interaction ,solute-solvent molecular interaction and solvent-solvent molecular interaction must be equal in order to form a ideal solution.

The enthalpy of mixing and volume of mixing of ideal solution is zero.

enthalpy of mixing is the amount of energy released on mixing a solute and solvent and in case  of ideal solutions it is zero.

Volume of mixing is change in volume on mixing a solute and solvent.

3 0
4 years ago
Suppose that you lowered the temperature of a gas from 100˚C to 50 ˚C. By what factor do you change the volume of the gas?
Maru [420]

Answer:- Volume decreases by a factor of 1.15.

Solution:- At constant pressure, volume of the gas is directly proportional to the the kelvin temperature.

The equation is written as:

\frac{V_1}{T_1}=\frac{V_2}{T_2}

where, V_1 is the volume at initial temperature T_1 and V_2 is the volume at final temperature T_2 .

Temperature must be in kelvins. So, let's convert both the temperatures to kelvin.

To convert degree C to kelvin we add 273.

So, T_1  = 100 + 273 = 373 K

T_2 = 50 + 273 = 323 K

The equation could also be written as:-

\frac{V_1}{V_2}=\frac{T_1}{T_2}

\frac{V_1}{V_2}=\frac{373}{323}

\frac{V_1}{V_2} = 1.15

From here we could say that the volume decreases by a factor of 1.15.

For example if the initial volume V_1 is 1 L then final volume V_2 will be \frac{1L}{1.15} that is 0.87 L.




4 0
3 years ago
The anions formed from the atoms of the elements in family VIA should carry a +6 charge.
xz_007 [3.2K]

The answer would be true

3 0
4 years ago
A gas has a volume of 20.0 L at a pressure of 950 mmHg with a temperature of 125.0 o If the conditions are changed to STP, what
ehidna [41]
Use formula: Initial Pressure x Initial Volume/Initial temperature = Final pressure x Final Volume/Final Temperature => 17.15L

6 0
3 years ago
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