Answer:
The correct answer is option c.
Explanation:
Alkanes with higher molecular mass has higher boiling point.
Thisis because when the molar mass of the alkanes increases the the surface area increases with which van der Waals forces between the molecules of alkane also increase which increases the association of the molecules of with each other which results in increase in boiling point is observed.
The increasing order of the molar mass of the given alkanes;
So out of ethane, pentane and heptane . Heptane has highest molecular mass with higher boiling point value. Where as ethane have the lowest value of boiling point.
Because the tree might get struck by lightning and the tree will catch on fire leaving you to get burned
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Because of its chemical structure.
Answer:
6 elements which are carbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus
Explanation:
Living organisms are made up of various unit of giant organic molecules that have been produced through life processes.
The bulk of elements that makes up living organisms are carbon, hydrogen, nitrogen, oxygen, sulfur and phosphorus.
Carbon is almost present everywhere in living organisms. It's unique ability to form a key component lies on its bond formation capabilities. Carbon is found in nearly all organic molecules like carbohydrates, proteins, fats and oils, e.t.c
Hydrogen like carbon is key to life. It is light and making it form different bond types with carbon. It is one of the atoms that makes up water.
Nitrogen is usually found in proteins. They are unique elements that life cannot do without.
Oxygen is useful in respiration processes and it is the bedrock through which energy is released from glucose.
Sulfur is key to life.
Phosphorus in Adenosine Diphosphate is a good store of energy.
