If 560 out of ten thousand student in a school are boys then write a deciminal for a part of the school that consists of girls.

The simplest formula of the alcohol is,

Explanation:

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

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

We are given:

Mass of

Mass of

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 1.913 g of carbon dioxide,  of carbon will be contained.

For calculating the mass of hydrogen:

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

So, in 1.174 g of water,  of hydrogen will be contained.

Mass of oxygen in the compound = (1.000) - (0.522 + 0.130) = 0.348 g

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Carbon =

Moles of Hydrogen =

Moles of Oxygen =

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.022 moles.

For Carbon =

For Hydrogen  =

For Oxygen  =

Step 3: Taking the mole ratio as their subscripts.

The ratio of C : H : O = 2 : 6 : 1

The empirical formula for the given compound is

Therefore, the simplest formula of the alcohol is,

Hi there!

What is supersaturated solution

Super saturated solution in which solute is dissolved in solvent after when it is saturated or solvent is not able to dissolve more solute simply . A super saturated solution is made by heating the solvent and after that solute is mixed in solvent. When it solution come to room temperature it becomes crystal.

A simple Example

Sugar is dissolved in saturated solution by heating.

Further Examples

In your lemonade the water is the solvent because it is present in a greater quantity, and the lemon juice and sugar are the solutes, which get dissolved in the solvent. However, each solution can only hold so much solute. If a solution has the maximum amount of solute that can be dissolved, it is said to be saturated. Adding any more solute would cause it to simply fall out of solution. Have you ever tried to add extra sugar to your cold lemonade? It probably just fell to the bottom of the container and did not dissolve. That is because your lemonade was already saturated.

Seawater is an example of a solution supersaturated with respect to calcium carbonate.

Fe + CuSO₄ > FeSO₄  +  Cu ( Single replacement )

2Mg + O₂   > 2 MgO  ( synthesis)

2H₂O₂  > 2 H₂O +  O₂   (decomposition)

CH₃COOH + NaHCO₃   > NaC₂H₃O₂ + CO₂ + H₂O

CuSO₄  + 2 NaOH  >   Cu(OH)₂  +  Na₂SO₄   (double displacement)

Hello!

How many percent of propanoic acid is hydrogen?

Select one:

a. 8.49

b. 8.16

c. 8.35

d. 8.07

Solving:

[First step]  Identify the compound:  

The propanoic acid compound has the following molecular formula

[Second step]  Identify molar mass of propanoic acid

molecular weight of the element in the compound = number of elements (n) * molecular weight

C = 3*(12.0107u) = 36.0321 u

H = 6*(1.00794u) = 6.04764 u

O = 2*(15.999u) = 31.998 u

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[Third step] Now, we apply the data to the percentage composition formula of an element, let us see:

b. 8.16

the percentage of hydrogen in propanoic acid is 8.16 %

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I Hope this helps, greetings ... Dexteright02! =)