There are 6.02 × 10²³ formula units of CaCl2 in 111 g CaCl2. Details about formula units can be found below.
<h3>What is a formula unit?</h3>
Formula unit refers to the empirical formula of an ionic compound for use in stoichiometric calculations.
According to this question, there are 111g of CaCl2. The formula units can be calculated by multiplying the number of moles by Avogadro's number.
no of moles in CaCl2 = 111g ÷ 111g/mol = 1mol
Formula units of CaCl2 = 1mol × 6.02 × 10²³ = 6.02 × 10²³ formula units.
Therefore, there are 6.02 × 10²³ formula units of CaCl2 in 111 g CaCl2.
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Answer:
1.04 moles of AlCl₃
Explanation:
Balanced Equation: 2Al°(s) + 3Cl₂(g) => 2AlCl₃(s)
Approach => convert given data (28 g Al°) to moles. The number of moles AlCl₃ would equal the number of moles aluminum because coefficients for Aluminum and Aluminum Chloride are equal.
moles Al° = (28g)/(27g/mole ) = 1.04 mole Al°
From balanced equation moles AlCl₃ produced equals moles of Al° produced = 1.04 mole AlCl₃ because coefficients of Al° & AlCl₃.
Chemical Change can produce a new substance. The effects of chemical change differs from the effects of physical change because physical change is simple a change within a substance through natural procedures like freezing and melting.
Answer:
8
Explanation:
From the question given above, the following data were obtained:
Empirical formula = C₅H₇
Molecular weight = 537 amu.
Number of empirical unit (n) =?
We can obtain the number of empirical units in the actual molecular formula by doing the following:
[C₅H₇]n = 537
[(12×5) + (1×7)]n = 537
[60 + 7]n = 537
67n = 537
Divide both side by 67
n = 537/67
n = 8
Thus, there are 8 empirical units in the molecular formula
The answer for the following question is explained below.
- <u><em>Therefore the temperature that is require to fill the gas is 254.3 K</em></u>
Explanation:
Given:
no of moles (n) = 3.67 moles
volume of the gas (V) = 67.5 liters
pressure of the gas (P) = 115 k Pa
To solve:
Temperature of the gas (T)
We know;
<u>P × V = n × R × T</u>
<em>Where;</em>
P is pressure of the gas
V is the volume of the gas
n is the no of the moles
R is the universal gas constant
here the value of R(universal gas constant ) is 8.314 k Pa./mole.K
We know;
115 × 67.5 = 3.67 × 8.3145 × T
T =
T =
T = 254.39 K
<u><em>Therefore the temperature that is require to fill the gas is 254.3 K</em></u>