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Andre45 [30]
3 years ago
6

A gas has a temperature of 14 °C, and a volume of 4.5 liters. If the temperature is raised to 29

Chemistry
1 answer:
Ierofanga [76]3 years ago
7 0

The new volume of the gas wii be 4.7 liters.

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Calculate the concentration of A bottle of wine contains 12.9% ethanol by volume. The density of ethanol (CH3OH) is 0.789 g/cm e
Delicious77 [7]

Answer:

The mass percentage of the solution is 10.46%.

The molality of the solution is 2.5403 mol/kg.

Explanation:

A bottle of wine contains 12.9% ethanol by volume.

This means that in 100 mL of solution 12.9  L of alcohol is present.

Volume of alcohol = v = 12.9 L

Mass of the ethanol = m

Density of the ethanol ,d= 0.789 g/cm^3=0.789 g/mL

1 cm^3=1 mL

m=d\times v=0.798 g/ml\times 12.9 mL = 10.1781 g

Mass of water = M

Volume of water ,V= 100 mL - 12.9 mL = 87.1 mL

Density of water = D=1.00 g/mL

M=D\times V=1.00 g/ml\times 87.1 mL =87.1 g

Mass percent

(w/w)\%=\frac{m}{m+M}\times 100

\frac{10.1781 g}{10.1781 g+87.1 g}\times 100=10.46\%

Molality :

m=\frac{m}{\text{molar mass of ethanol}\times M(kg)}

M = 87.1 g = 0.0871 kg (1 kg =1000 g)

=\frac{10.1781 g}{46 g/mol\times 0.0871 kg}

m=2.5403 mol/kg

4 0
3 years ago
Camilla believes that Earth's crust is evenly thick all around the globe, Maclaya thinks that Camilla is wrong, but doesatt know
xenn [34]

Answer:Macaya (floruit 1802), was a Kongolese-born Haitian revolutionary military leader. Macaya was one of the first black rebel leaders in Saint-Domingue to ally himself with the French Republican commissioners Sonthonax and Polverel. He helped to lead forces that recaptured Cap-Français on behalf of the French Republicans.

Macaya was born in west-central Africa, probably in the Kingdom of Kongo, and taken to the French colony of Saint-Domingue as a slave. After the outbreak of the 1791 slave rebellion in northern Saint-Domingue, Macaya became a lieutenant of an elderly rebel commander named Pierrot. Pierrot's rebel forces were based in the hills outside of Le Cap (Cap Francaise), near Bréda plantation by 1793.

Explanation:

7 0
3 years ago
An element has the electronic configuration 1s22s22p63s23p63d104s24p65s2. identify the element.
o-na [289]
The answer is Strontium
8 0
3 years ago
Calcium nitrate, Ca(NO3)2 , is a(n) ___________________.
Aleonysh [2.5K]
B. Compound

Calcium nitrate is an inorganic compound
6 0
3 years ago
Read 2 more answers
A mixture of hydrogen and nitrogen gases is placed in a 1.0 L reaction vessel and the reaction is allowed to reach equilibrium a
e-lub [12.9K]

Answer:

a. 0.27 = Kc

b. 8.19×10⁻⁵ = Kp

Explanation:

The reaction is this: 3H₂(g) + N₂ (g)  ⇄ 2NH₃ (g)

As we have the moles of each in the equilibrium and the volume is 1L, we assume the concentrations as molarity.

1.6981 mol/L → H₂

0.5660 mol/L → N₂

0.8679 mol/L → NH₃

Let's make the expression for Kc

Kc = [NH₃]² / [N₂] . [H₂]³

Kc = 0.8679² / 0.5660 . 1.6981³

Kc = 0.27

Let's calculate Kp, derivated from Kc

Kp = Kc . (RT)^Δn where:

Δn is the difference between final moles - initial moles. It is governed by stoichiometry. For this case 2 - (1+3) = -2

Δn it is always for gases

R is the Ideal gases constant

T is Absolute T°

Let's replace data → 0.27 . (0.082 . 700K)⁻² = Kp

8.19×10⁻⁵ = Kp

8 0
3 years ago
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