All categories

1 year ago

15 POINTS!! does anyone know the answer to this? is it A?

Chemistry

2 answers:

Norma-Jean [14]1 year ago

7 0

Answer:

b.2

Explanation:

lakkis [162]1 year ago

5 0

Answer:

Mole fraction of water(H₂O) is 0.5 and the mole fraction of CH₃OH(Methanol) is 0.5.

Explanation:

Greetings !

The molecular weight of CH₃OH(Methanol)=32g/mol

The number of moles of CH₃OH=

$\frac{128g}{32g/mol}$

=4moles

The molecular weight of water H₂O =18g/mol

The number of moles of=

$\frac{72g}{18g/mol}$

=4moles

Total number of moles in the solution =4mol + 4mol

=8mol

Mole fraction Methanol CH₃OH=

$\frac{4mol}{8mol}$

=0.5mol

Hope it helps!

You might be interested in

g Ammonia has been studied as an alternative "clean" fuel for internal combustion engines, since its reaction with oxygen produc

Gala2k [10]

$\text{Ammonia has been studied as an alternative "clean" fuel for internal combustion}$

$\text{engines, since its reaction with oxygen produces only nitrogen and water vapor,}$

$\text{and in the liquid form it is easily transported. An industrial chemist studying this}$

$\text{reaction fills a} \ \mathbf{100 \ L }\ \text{tank with} \ \mathbf{8.6 \ mol} \ \text{of ammonia gas and} \ \mathbf{28 \ mol} \ \ \text{of oxygen gas, }$

$\text{to be} \ \mathbf{2.6\ mol} \ .\ \text{Calculate the concentration equilibrium constant for the combustion of}$

$\text{ammonia at the final temperature of the mixture. Round your answer to 2 significant digits.}$

Answer:

Explanation:

From the correct question above:

The reaction can be represented as:

$\mathbf{4 NH_3_{(g)}+ 3O_{2(g)} \iff 2N_{2(g)}+ 6H_2O_{(g)} }$

From the above reaction; the ICE table can be represented as:

$\mathbf{4 NH_3_{(g)}+ 3O_{2(g)} \iff 2N_{2(g)}+ 6H_2O_{(g)} }$

I (mol/L) 0.086 0.28 0 0

C -4x -3x +2x +6x

E 0.086 - 4x 0.28 - 3x +2x +6x

At equilibrium;

The water vapor = $\dfrac{2.6 \ mol}{100 \ L} = 6x$

$x = \dfrac{2.6}{100} \times \dfrac{1}{6}$

$x = 0.00433$

$\text{equilibrium constant} ({k_c}) = \dfrac{ [N_2]^2 [H_2O]^6 }{ [[NH_3]^4] [O_2]^3 }$

$\implies \dfrac{(2x)^2 (6x)^6}{(0.086-4x)^4\times (0.28-3x)^3} \\ \\$

Replacing the value of x, we have:

$K_c = \dfrac{4 \times 46,656 \times x^8}{(0.086-4x)^4\times (0.28 -3x)^3} \\ \\ K_c = \dfrac{4 \times 46656 \times (0.00433)^8}{(0.06868)^4(0.26701)^3} \\ \\ K_c = \mathbf{5.4446 \times 10^{-8}}$

$K_c = \mathbf{5.5 \times 10^{-8} \ to \ 2 \ significant \ figures}$

5 0

3 years ago

In a sample of solid ba(no3)2 the ratio of barium ions to nitrate ions is

user100 [1]

<span>In a sample of solid Ba(NO3)2 the ratio of barium ions to nitrate ions is would be one is to 2 or 1:2. Barium ion has a formal charge of positive two which means that it needs two ions which has a formal charge of negative one or 1 ion with the formal charge of negative two. However, for this case, it is bonded to a nitrate ion which has a formal charge of negative one. Therefore, it needs two nitrate ions so that for every 1 atom of barium ion, we need two ions of nitrate ions.</span>

3 0

3 years ago

_BF3 + ___Li2SO3 -->

Nikolay [14]

I’m on the same question

7 0

3 years ago

Why is oxygen written with a subscript 2 in CO2?

Alexeev081 [22]

Answer:

Explanation:

the answer is b

6 0

3 years ago

Read 2 more answers

Which statement describes a chemical property of water?

anygoal [31]

<span>The chemical description of water is H2O, which means, it is composed of 2 hydrogen atoms and 1 oxygen atom. The answer to this item is the fourth option, " It is clear and colorless." When water is added with calcium, clear, colorless bubbles are formed. This explains a reaction of water with acid. The following are additional facts about water properties: Density: 1 g/cm³ Boiling point: 100 °C Molar mass: 18.01528 g/mol Melting point: 0 °C Formula: H2O</span>

7 0

2 years ago

Read 2 more answers