U need to write in English bc can't answer it then
Answer:
Photosynthesis removes carbon from the atmosphere, and cellular respiration releases carbon back into the atmosphere. Photosynthesis is part of the carbon cycle, and cellular respiration is not. (Only plants perform photosynthesis, and only animals perform cellular respiration )
Explanation:
Answer:
CH4
Explanation:
In solving this problem, we must remember that one mole of a compound contains Avogadro's number of elementary entities. These elementary entities include atoms, molecules, ions etc. Recall that one mole of a substance is the amount of substance that contains the same number of elementary entities as 12g of carbon-12. The Avogadro's number is 6.02 × 10^23.
Hence we can now say;
If 163 g of the compound contains 6.13 ×10^24 molecules
x g will contain 6.02 × 10^23 molecules
x= 163 × 6.02 × 10^23 / 6.13 × 10^24
x= 981.26 × 10^23/ 6.13 ×10^24
x= 160.1 × 10^-1 g
x= 16.01 g
x= 16 g(approximately)
16 g is the molecular mass of methane hence x must be methane (CH4)
Answer : The minimum mass of ethylene glycol is, 12000.2 grams.
Explanation : Given,
Molal-freezing-point-depression constant 
for water = 
Mass of water (solvent) = 14.5 kg
Molar mass of ethylene glycol = 62.07 g/mole
Formula used :
where,
= change in freezing point
= freezing point of solution = 
Conversion used :
= freezing point of water = 
i = Van't Hoff factor = 1 (for non-electrolyte)
= freezing point constant for water =
m = molality
Now put all the given values in this formula, we get
Therefore, the minimum mass of ethylene glycol is, 12000.2 grams.
