Answer :
(1) The correct option is, 2-ethylpentane
(2) The correct option is, 2,3-dimethylpentane
(3) The correct option is, 2-methyl-2-butene
(4) The correct option is, 7-ethyl-4-dodyne
(5) The correct option is, pentanoic acid
Explanation :
The basic rules for the naming of organic compounds are :
- First select the longest possible carbon chain.
- The longest possible carbon chain should include the carbons of double or triple bonds.
- The naming of alkane is done by adding the suffix -ane, alkene by adding the suffix -ene, alkyne by adding the suffix -yne and carboxylic acid by adding the suffix -oic acid.
- The numbering is done in such a way that first carbon of double or triple bond gets the lowest number.
- The carbon atoms of the double or triple bond get the preference over the other substituents present in the parent chain.
- If two or more similar alkyl groups are present in a compound, the words di-, tri-, tetra- and so on are used to specify the number of times of the alkyl groups in the chain.
Answer:
a scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
Answer:
62.9%
Explanation:
Step 1: Given data
- Mass of hydrate sodium carbonate (mNa₂CO₃.xH₂O): 71.5 g
- Mass of anhydrous sodium carbonate (mNa₂CO₃): 26.5 g
Step 2: Calculate the mass lost of water
We will use the following expression.
mH₂O = mNa₂CO₃.xH₂O - mNa₂CO₃
mH₂O = 71.5 g - 26.5 g = 45.0 g
Step 3: Calculate the percent of water in the hydrate sodium carbonate
We will use the following expression.
%H₂O = mH₂O / mNa₂CO₃.xH₂O × 100%
%H₂O = 45.0 g / 71.5 g × 100%
%H₂O = 62.9%