Alkanes are hydrocarbons with general formula 
.
So alkane with two carbon atoms will be 
, alkane with four carbon atoms will be 
, alkane with six carbon atoms will be 
, alkane with eight carbon atoms will be 
.
As the number of carbon atoms increase, the surface area will increase and thus the vanderwaal forces will also increase, and the boiling point will also increase.
Thus the approximate boiling point order is: 
The approximate boiling points will be: 125° C >68° C > -1 °C > -89° C
Answer: 
The chromium nucleus will complete the reaction.
Explanation:
The given reaction is a type of radioactive nuclei decay:
Positron emission: It is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. This is also known as 
-decay. In this the mass number remains same.
Now according to the given reaction:
The chromium nucleus will complete the reaction.
Answer:
A) The speed of the pitching machine relative to the truck is 0 m/s
B) the speed of the pitched ball relative to the truck is 87mph
C) the speed of the pitching machine relative to him is 65mph
D) the speed of the pitched ball relative to him is 87mph - 65mph = 22mph
Answer:
a fossil of a footprint, trail, burrow, or other trace of an animal rather than of the animal itself.
Explanation:
Trace fossils are the indirect evidence of life in the past, such as the footprints, tracks, burrows, borings, and feces left behind by animals, rather than the preserved remains of the actual animal body itself.
Fossil is the naturally preserved remains of plants and animals which somehow get trapped in amber, hair, petrified wood, oil, coal, and DNA remnants.
Answer:
If they are metallic spheres they are connected to earth and a charged body approaches
non- metallic (insulating) spheres in this case are charged by rubbing
Explanation:
For fillers, there are two fundamental methods, depending on the type of material.
If they are metallic spheres, they are connected to earth and a charged body approaches, this induces a charge of opposite sign and of equal magnitude, then it removes the contact to earth and the sphere is charged.
If the non- metallic (insulating) spheres in this case are charged by rubbing with some material or touching with another charged material, in this case the sphere takes half the charge and when separated each sphere has half the charge and with equal sign.
