Butane mol A sample of an alcohol is tested and found to contain 52% carbon, 35% oxygen, and 13% hydrogen by mass. Tests indicate that the molecular weight of the molecule is between 30 and 80.
What is the molecular formula of the alcohol?
Answers
Answer:
Explanation:
For a compound as:
Let say your sample weighs 100 g, then you have
52 g of C
35 g of O
13 g of H
Now you need to calculate the moles in the sample:
moles of C = 52 / 12 = 4.3333
moles of O = 35 / 16 = 2.1875
moles of H = 13 / 1 = 13
Now you divide the moles by the least to have a proportion (2.1875):
moles of C = 4.3333 / 2.1875 = 2
moles of O = 2.1875 / 2.1875 = 1
moles of H = 13 / 2.1875 = 6
So the molecule proportion of atoms is C:H:O = 2:6:1
Now to find x you have to calculate the MM:
MM = 12 * 2x + 1 * 6x + 16 * x = 46x
For x = 1 => MM = 46(1) = 46
For x = 2 => MM = 46(2) = 92
Since the MM is between 30 and 80, x = 1
Related Questions
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What is the difference between gram positive and gram negative?
Describe how activity within the earth results in earthquakes
Describe how to properly measure the volume of a liquid.
(1) Kr (3) N2O4
(2) LiOH (4) NaI
Answers
Answer: Option (3) is the correct answer.
Explanation:
A molecular compound is a compound in which atoms used to share electrons and thus results in the formation of covalent bonds.
For example, is a covalent compound and hence, it is a molecular compound.
Whereas LiOH and NaI are ionic compounds as their atoms has transferred electrons.
Therefore, we can conclude that out of the given options, is the formula which represents a molecular compound.
Answers
Wine is a homogenous mixture while beef stew is a heterogeneous mixture as it has components which are clearly visible.
What are the heterogeneous mixtures?
Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.
As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.
Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.
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Beef Stew is heterogeneous mixture. You can see the beef AND stew, it is different throughout. Not the same. Most heterogeneous mixtures are chunky or lumpy.
Answers
Answer : The percent by mass of oxygen in propanal is, 27.58 %
Solution : Given,
Molar mass of carbon = 12 g/mole
Molar mass of hydrogen = 1 g/mole
Molar mass of oxygen = 16 g/mole
First we have to calculate the molar mass of propanal,
Molar mass of propanal, =
Now we have to calculate the percent by mass of oxygen in propanal.
Therefore, the percent by mass of oxygen in propanal is, 27.58 %
% mass = molar mass of part over molar mass of whole,
molar mass of oxygen is 16
molar mass of carbon is 12
molar mass of hydrogen is 1
so (16) / (16+12*6+3) = 16/91 = 17.58%
4.00 cm x 4.00 cm, calculate the third dimension of the block.
Answers
Answer:
y = 2.77 cm
Answer: The third dimension is 2.77 cm
Final answer:
The question deals with density in physics, specifically regarding the densest metal, osmium. The dimensions of an osmium block are partially given, and the task is to find the third dimension. However, without the mass of the block, it is impossible to give a complete solution.
Explanation:
The subject of the question involves understanding the concept of density, which is the mass of an object divided by its volume. The density of osmium is given as 22.57 g/cm³. The student is also given the dimensions of the osmium block, which forms a rectangular prism with known length and width (4.00 cm x 4.00 cm), but unknown height. D = m/v or v = m/D can be used to find the third dimension of the block (height).
However, to use this formula to get a complete solution, the mass of the block must be known, which is not provided in the question. Without this crucial information, we can't solve this problem correctly.
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Answers
Answer : The temperature on the kelvin scale is, 277.15 Kelvin
Explanation :
As we are given the temperature in degree Celsius. Now we have to need to convert the temperature from degree Celsius into kelvin.
Conversion used for the temperature from degree Celsius to Kelvin :
Therefore, the temperature on the kelvin scale is, 277.15 Kelvin
Answers
Carbonic acid dissolves limestone and other rocks. This is an example of chemical erosion. An example is in the caves. Caves are formed where rainwater as it falls through the atmosphere absorbs carbon dioxide. The carbon dioxide makes the rain acidic to react it with the limestone bedrock. The rainwater is absorbed by the soil into the ground. Then as it enters through the soil, the rainwater will absorb more carbon dioxide that is produced by the decomposers. The carbon dioxide with water reacts to form carbonic acid. The carbonic acid will react to limestone and dissolves it slowly. As the space become larger, water can enter into it.
Answer:
chemical errosion
Explanation: