Answer:
Physical Change: Melting Ice
Chemical Change: Burning Wood
Explanation:
hope this helps <3
The rate of decay of the isotope
<span>(3) Atomic masses are a weighted average of the naturally occurring isotopes.
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Here, we found this answer my looking at the key words 'naturally occurring isotopes'
An isotope is a different amount of neutrons, making the atomic mass change.
Photosynthesis: The process which is used by organisms and plants to convert light energy to chemical energy. This process, takes in the carbon dioxide which is produced by the organisms and adds oxygen again in the atmosphere.
Sedimentation: This process is used for the treatment of water by using to remove suspended solid particles or unwanted particles from water.
Respiration: The process in which intake of oxygen occurs and release of carbon dioxide takes place.
Evaporation: The process in which liquid state changes into gaseous state.
Hence, according to the definition of respiration, due to this process only carbon dioxide is adds to the atmosphere.
Thus, respiration is the correct answer.
Answer:
B
Explanation:
The ratios of the coefficient of the compounds in a balanced chemical equation tells us the relationship of each compound to the others in terms of mole.
Based on the equation,
3 moles of CO₂ would require 2 moles of phosphoric acid.
3 mol CO₂ ------- 2 mol H₃PO₄
1.5 mol CO₂ ------- 2 ÷2= 1 mol H₃PO₄
Or 1.5 mol would require 
mol of H₃PO₄
To find mass of H₃PO₄, multiply the number of moles by its Mr, which can be deduced with the help of the periodic table.
Ar of H₃PO₄
= 3(Ar of H) + Ar of P +4(Ar of O)
= 3(1) +31 +4(16)
= 98
Multiply 98 with the number of moles, 1, to obtain the answer.
So if you would look at the steps above, here's what we did:
