Oxygen is the second. The first is nitrogen which makes up 78% of air. Oxygen makes up 21% of air.
D, Evaporation. Like the water cycle..
<u>Answer:</u> The final temperature of water is 38.5°C
<u>Explanation:</u>
To calculate the amount of heat released or absorbed, we use the equation:
where,
q = heat absorbed = 1.506 kJ = 1506 J (Conversion factor: 1 kJ = 1000 J)
m = mass of water = 30 g
c = specific heat capacity of water = 4.184 Jl/g.°C
= change in temperature = 
Putting values in above equation, we get:
Hence, the final temperature of water is 38.5°C
Answer:
True
Explanation:
Technology has been mans best friend for a while due to the fact that they can make things to help others and create more jobs and help everyone overall.
Answer is: branched alkene.
Carbon atoms can be
arranged s<span>traight chain, branched chain and ring.
Hydrocarbon is an organic compound consisting of hydrogen and carbon.
In straight chain carbon atoms are
bonded with only two other carbon atoms in elongate chain.
In branched chain at least one carbon is bonded
with more than two other carbon atoms. In this example </span><span>2-methylpentene</span><span> second carbon atom is bonded with three carbon atoms.
Ring chain hydrocarbons are cyclic hydrocarbons.</span>
