Answer:
Methylethanoate with the molecular formula; CH₃- CO₂-CH₃
Explanation:
The Molecular formula of the given compound CH₃ - CH₂- COOH is called propanoic acid. Molecular formula expresses the exact number and kinds of atoms of the elements present in the molecule of a compound. Propanoic acid is the second compound in the group of carboxylic acids. The certain similarities these carboxylic acids posses is due to the functional group - COOH. Functional groups is the categorization of atoms within molecules that possess their own certain characteristics which makes them distinct from other functional groups.
The molecular formula which represents an isomer of the given compound CH₃ - CH₂- COOH is called Methylethanoate with the molecular formula; CH₃- CO₂-CH₃
Isomers are existence of two or more compounds with the same exact molecular formula but with different molecular structures due to the difference in the arrangement of atoms or spatial orientation of atoms.
Answer:
Explanation:
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In this case, according to the attached solubility chart, it is possible for us to realize that about 88 grams of KNO3 are soluble at 50 °C but just 30 grams are soluble at 20 °C in the same 100 g of water.
In such a way, the crystalized mass of this solute can be calculated by subtracting the mass at 50 °C and the mass at 20 °C:
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The question is incomplete, the complete question is:
A certain liquid X has a normal freezing point of and a freezing point depression constant
. Calculate the freezing point of a solution made of 81.1 g of iron(III) chloride () dissolved in 850. g of X. Round your answer to significant digits.
<u>Answer:</u> The freezing point of the solution is
<u>Explanation:</u>
Depression in the freezing point is defined as the difference between the freezing point of the pure solvent and the freezing point of the solution.
The expression for the calculation of depression in freezing point is:
OR
......(1)
where,
Freezing point of pure solvent =
Freezing point of solution =
i = Vant Hoff factor = 4 (for iron (III) chloride as 4 ions are produced in the reaction)
= freezing point depression constant =
= Given mass of solute (iron (III) chloride) = 81.1 g
= Molar mass of solute (iron (III) chloride) = 162.2 g/mol
= Mass of solvent (X) = 850. g
Putting values in equation 1, we get:
Hence, the freezing point of the solution is