What is the angle between the carbon-oxygen bond and one of the carbon-fluorine bonds in the carbonyl fluoride ( cof2 ) molecule
?
2 answers:
Answer: More than .
Explanation:
In carbonyl fluoride molecule, carbon is hybridized with planar geometry. Oxygen in doubled bonded to the carbon and two fluorine atoms are single bonded with carbon atom.
In hybridization the angle between the two adjacent hybridized molecular orbitals is at
.Since, lone pair present on the oxygen atoms will repel the carbon-fluorine bond pairs away by which angle between (O-C-F) will become more than
.
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<u>Answer:</u> The volume of solution is 1.74 L
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of potassium dichromate = 100 g
Molar mass of potassium dichromate = 294.185 g/mol
Putting values in above equation, we get:
To calculate the volume of solution, we use the equation:
We are given:
Molarity of solution = 0.195 M
Moles of potassium dichromate = 0.34 moles
Putting values in above equation, we get:
Hence, the volume of solution is 1.74 L
Answer:
It is a test for proteins in urine
Explanation:
The Biuret reagent is made of sodium hydroxide (NaOH) and hydrated copper(II) sulfate. The biuret reagent is commonly used to test for proteins. The biuret test is also known as Piotrowski's test. It is a chemical test commonly used in detecting the presence of peptide bonds. In the presence of peptides, a copper(II) ion forms purple-colored coordination complexes in an alkaline solution.
Hence the addition of this Biuret reagent to a urine sample in a test tube aims to detect the presence or absence of proteins in the given urine sample. If there is protein in the urine sample, the blue colour of the Biuret reagent turns purple. If there is no protein in the urine sample, the Biuret reagent remains blue.
In an alkaline solution, copper II is able to form a complex with the peptide bonds in proteins. Once this complex has been formed, the Biuret solution turns from a blue color to a purple color. This is the positive test for proteins.
