<h2>Answer:</h2>
<u>Temperature dependency is responsible for the process that hot water freeze faster than cold water.</u>
<h2>Explanation:</h2>
The effect given above is called Mpemba Effect. According to this idea hot water freezes more quickly as compared to cold water. But until now there is no convincing explanation for this strange phenomenon. One idea is that hot containers make better thermal contact with a refrigerator and so conduct heat more efficiently because a good conductor is good fro the transfer of heat. Another idea about this effect is that warm water evaporates more quickly and since this is an endothermic process, it cools the water making it freeze more quickly.
False. Chemical products are on the right side.
Answer: Charles's law, Avogadro's law and Boyle's law.
Explanation:
Boyle's law is: at constant temperature PV = constant
Charles law is: at constant pressure V/T = constant
Avogadro's law is: at constant pressure ant temperature, equal volume of gases contain equal number of moles: V/n = constant
Ideal gas law: PV/nT = constant => PV = nT*constant = PV = nTR
Answer:
87.5 % is the percent yield
Explanation:
We convert the mass of H₂ to moles: 4 g / 2g/mol = 2 moles of H₂
The reaction is: CO(g) + 2H₂(g) → CH₃OH(l)
So ratio is 2:1. Therefore, If I have 2 moles of hydrogen I would produce 1 mol of methanol.
So, as molar mass of methanol is 32g/mol; 32 g is the mass of produced methanol, at the 100 % yield reaction (theoretical yield)
Percent yield will be: (produced yield/ theoretical yield) . 100
(28 g / 32g) . 100 = 87.5 %
