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3 years ago

3. What are the coefficients needed to balance this equation: Li + Alci→ LICI + Al?

Chemistry

1 answer:

JulijaS [17]3 years ago

5 0

Explanation:

The problem is in balancing the reaction equation;

Li + AlCl₃ → LiCl + Al

In balancing chemical equations, we must keep the law of conservation of matter in mind.

The law shows that the number of atoms on both sides of the reaction must be the same.

To balance the given equation, we set up simple, solvable algebraic mathematical expressions:

aLi + bAlCl₃ → cLiCl + dAl

Coefficients a, b,c and d

Conserving:

Li: a = c

Al: b = d

Cl: 3b = c

let b = 1;

d = 1

c = 3

a = 3

3Li + AlCl₃ → 3LiCl + Al

learn more:

Balanced chemical equation brainly.com/question/2947744

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A sample of 1.000 g of a compound containing carbon and hydrogen reacts with oxygen at elevated temperature to yield 0.692 g H₂O

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Answer :

(a) 1.000 g of compound containing carbon and hydrogen is, 0.922 g and 0.0769 g respectively.

(b) There is no other element present in the compound.

Explanation :

(a) Now we have to determine the masses of C and H in the sample.

The chemical equation for the combustion of hydrocarbon having carbon, hydrogen and oxygen follows:

$C_xH_y+O_2\rightarrow CO_2+H_2O$

where, 'x' and 'y' are the subscripts of Carbon and hydrogen respectively.

We are given:

Mass of $CO_2=3.381g$

Mass of $H_2O=0.692g$

We know that:

Molar mass of carbon dioxide = 44 g/mol

Molar mass of water = 18 g/mol

For calculating the mass of carbon:

In 44 g of carbon dioxide, 12 g of carbon is contained.

So, in 3.381 g of carbon dioxide, $\frac{12}{44}\times 3.381=0.922g$ of carbon will be contained.

For calculating the mass of hydrogen:

In 18 g of water, 2 g of hydrogen is contained.

So, in 0.692 g of water, $\frac{2}{18}\times 0.692=0.0769g$ of hydrogen will be contained.

Thus, 1.000 g of compound containing carbon and hydrogen is, 0.922 g and 0.0769 g respectively.

(b) Now we have to determine the compound contain any other elements or not.

Mass carbon + Mass of hydrogen = 0.922 g + 0.0769 g = 0.999 g ≈ 1 g

This means that there is no other element present in the compound.

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Draw the structure for the ring compounds with formulas C6H12 and C6H6

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Aleksandr-060686 [28]

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Explanation:

To calculate the mole percent of a substance, we use the equation:

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Mass percent means that the mass of a substance is present in 100 grams of mixture

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

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harkovskaia [24]

Answer:

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