Answer:
a solar eclipse is when the moon moves between the earth and the sun, so the moon casts a shadow on the earth
Explanation:
Answer : The excess reactant in the combustion of methane in opem atmosphere is
molecule.
Solution : Given,
Mass of methane = 23 g
Molar mass of methane = 16.04 g/mole
The Net balanced chemical reaction for combustion of methane is,
![CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)](https://tex.z-dn.net/?f=CH_4%28g%29%2B2O_2%28g%29%5Crightarrow%20CO_2%28g%29%2B2H_2O%28g%29)
First we have to calculate the moles of methane.
=
= 1.434 moles
From the above chemical reaction, we conclude that
1 mole of methane react with the 2 moles of oxygen
and 1.434 moles of methane react to give
moles of oxygen
The Moles of oxygen = 2.868 moles
Now we conclude that the moles of oxygen are more than the moles of methane.
Therefore, the excess reactant in the combustion of methane in open atmosphere is
molecule.
Answer:
- Daniel- Earth and Space
- Sanya- Chemistry
Explanation:
Daniel's study field is associated with the '<u>Earth and Space</u>' as he is attempting to explore how the frequency of tropical storms(in the atmosphere) and coastal erosion(relation with land and ocean) are interconnected to each other. He studies how the two are associated and affect life on the planet.
While Sanya's field of study would be '<u>Chemistry</u>' as she aims to study the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules('whether the discharge from industrial plants has any impact on the pH concentration of freshwater swamps in the surrounding area').
The atomic theory changed because as time passed by our technolgy has been improving our ability to find answers to these theories.