All categories

4 years ago

VICHELRING CONCEN1. Water is amolecule.

Chemistry

1 answer:

zaharov [31]4 years ago

3 0

Explanation:

the first thing you do with your child are in a world of good and good for the first word of life will be the best thing to be the same thing you need for a long 55666666inches to be in the

You might be interested in

An organic compound of relative molecular mass 46,on analysis was found to contain 52.0% carbon, 13.3% hydrogen and 34.7% oxygen

Nadya [2.5K]

Answer:

Empirical formula is C₂H₆O.

Explanation:

Empirical formula:

It is the simplest formula gives the ratio of atoms of different elements in small whole number

Given data:

Percentage of hydrogen = 13.3%

Percentage of carbon = 52.0%

Percentage of oxygen = 34.7%

Empirical formula = ?

Molecular formula = ?

Solution:

Number of gram atoms of H = 13.3 / 1.01 = 13 .17

Number of gram atoms of O = 34.7 / 16 = 2.17

Number of gram atoms of C = 52.0 / 12 = 4.3

Atomic ratio:

C : H : O

4.3/2.17 : 13.17/2.17 : 2.17/2.17

2 : 6 : 1

C : H : O = 2 : 6 : 1

Empirical formula is C₂H₆O.

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

n = 46 / 158

The relative molecular mass of compound is not correct.

4 0

3 years ago

At 25°C, K = 0.090 for the following reaction. H2O(g) + Cl2O(g) equilibrium reaction arrow 2 HOCl(g) Calculate the concentration

wlad13 [49]

Answer:

[HOCl] = 0.00909 mol/liter

[H₂O] = 0.03901 mol/liter

[Cl₂O] = 0.02351 mol/liter

Explanation:

1. Chemical reaction:

$H_2O(g)+Cl_2O(g)\rightleftharpoons 2 HOCl(g)$

2. Initial concentrations:

i) 1.3 g H₂O

Number of moles = 1.3g / (18.015g/mol) = 0.07216 mol

Molarity, M = 0.07216 mol / 1.5 liter = 0.0481 mol/liter

ii) 2.2 g Cl₂O

Number of moles = 2.2 g/ (67.45 g/mol) = 0.0326 mol

Molarity = 0.0326mol / 1.5 liter = 0.0217 mol/liter

3. ICE (Initial, Change, Equilibrium) table

$H_2O(g)+Cl_2O(g)\rightleftharpoons 2 HOCl(g)$

I 0.0481 0.0326 0

C -x -x +x

E 0.0481-x 0.0326-x x

4. Equilibrium expression

$K_c=\dfrac{[HOCl]^2}{[H_2O].[Cl_2O]}$

$0.09=\dfrac{x^2}{(0.0481-x)(0.0326-x)}$

5. Solve:

$x^2=0.09(x-0.0481)(x-0.0326)\\\\0.91x^2+0.007263x-0.000141125=0$

Use the quadatic formula:

$x=\dfrac{-0.007263\pm \sqrt{(0.007263)^2-4(0.91)(-0.000141125)}}{2(0.91)}$

The positive result is x = 0.00909

Thus the concentrations are:

[HOCl] = 0.00909 mol/liter

[H₂O] = 0.0481 - 0.00909 = 0.03901 mol/liter

[Cl₂O] = 0.0326 - 0.00909 = 0.02351 mol/liter

3 0

3 years ago

PLZ HELP IM TAKING A TEST AND ITS BEING TIMED!!!!!

m_a_m_a [10]

Answer:

Water and Rubbing alcohol.

Explanation:

Both are clear liquids, and the other answer choices are colored. So, these are the correct answers.

3 0

3 years ago

Which one from the drop down box

mel-nik [20]

CH4+ 2O2---> CO2+ 2H2O I believe would be correct.

7 0

4 years ago

When nitrogen gas is cooled to nearly negative 200 c it turns in to a liquid. As it goes from a gas to a liquid at this incredib

salantis [7]

Hey there,

I would conclude that your correct answer would be "physical". When the nitrogen gas get's very cold, this would be considered a physical change. The are properties that have physical properties.

Hope this helps.
~Jurgen

7 0

3 years ago

VICHELRING CONCEN1. Water is amolecule.​

VICHELRING CONCEN1. Water is amolecule.