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3 years ago

Which formula is an empirical formula?

Chemistry

2 answers:

Naily [24]3 years ago

6 0

CH4 as empirical formula is the simplest ratio of all the atoms in a molecule

Irina18 [472]3 years ago

5 0

Answer: The empirical formula is $CH_{4}$

Explanation:

Empirical formula is defined as the formula in which atoms in a compound are present in simplest whole number ratios.

For the given options:

Option A: $C_4H_{10}$

As, the atoms are not in the smallest whole number ratio, it is not the empirical formula. The empirical formula of this will be $C_2H_5$

Option B: $C_3H_{6}$

As, the atoms are not in the smallest whole number ratio, it is not the empirical formula. The empirical formula of this will be $CH_2$

Option C: $CH_{4}$

As, the atoms are in the smallest whole number ratio, it is the empirical formula.

Option D: $C_2H_{6}$

As, the atoms are not in the smallest whole number ratio, it is not the empirical formula. The empirical formula of this will be $CH_3$

Hence, the empirical formula is $CH_{4}$

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adell [148]

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5 0

3 years ago

A piece of wood has a labeled length value of 63.2 cm. You measure its length three times and record the following data: 63.1 cm

Ulleksa [173]

Percent error (%)= $\frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100$

Accepted value is true value.

Measured values is calculated value.

In the question given Accepted value (true value) = 63.2 cm

Given Measured(calculated values) = 63.1 cm , 63.0 cm , 63.7 cm

1) Percent error (%) for first measurement.

Accepted value (true value) = 63.2 cm, Measured(calculated values) = 63.1 cm

Percent error (%)= $\frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100$

$Percent error = \frac{\left | 63.2 - 63.1 \right |}{63.2}\times 100$

$Percent error = \frac{0.1}{63.2}\times 100$

$Percent error = 0.00158\times 100$

Percent error = 0.158 %

2) Percent error (%) for second measurement.

Accepted value (true value) = 63.2 cm, Measured(calculated values) = 63.0 cm

Percent error (%)= $\frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100$

$Percent error = \frac{\left | 63.2 - 63.0 \right |}{63.2}\times 100$

$Percent error = \frac{0.2}{63.2}\times 100$

$Percent error = 0.00316\times 100$

Percent error = 0.316 %

3) Percent error (%) for third measurement.

Accepted value (true value) = 63.2 cm, Measured(calculated values) = 63.7 cm

Percent error (%)= $\frac{\left | Accepted value - Measured value \right |}{Accepted value}\times 100$

$Percent error = \frac{\left | 63.2 - 63.7 \right |}{63.2}\times 100$

$Percent error = \frac{\left | -0.5 \right |}{63.2}\times 100$

$Percent error = \frac{(0.5)}{63.2}\times 100$

$Percent error = 0.00791\times 100$

Percent error = 0.791 %

Percent error for each measurement is :

63.1 cm = 0.158%

63.0 cm = 0.316%

63.7 cm = 0.791%

7 0

3 years ago

20 ml each of oxygen and methane are allowed to react when the reaction is completed. The system now contains

Mekhanik [1.2K]

Answer:

CH4(g)+2O2(g)→CO2(g)+2H2O(l).

5 0

2 years ago

What's the liquid that passes through a filter?

kirza4 [7]

Filtration can be used to separate an insoluble solid from a liquid, or a precipitate from the reaction mixture in which it formed. The solid which collects in the filter paper is called the residue. The clear liquid which passes through the filter paper is called the filtrate.

6 0

2 years ago

A substance made of two or more elements chemically combined in a set ratio, or proportion, is called a ___.

snow_lady [41]

Hey there!

The correct answer to your question is a compound.

A substance of two or more elements chemically combined in a set ratio, or proportion, is called a compound.
This is because compounds are made of two or more elements. Table salt is an example of a compound because it is made up of the elements chlorine and sodium.

Hope this helps you.
Have a great day!

7 0

2 years ago