Answer:
24382 J
162790 J
Explanation:
At 0°C, ice requires a certain amount of heat/energy to break its certain bonds and change its state into liquid water. This amount of heat per gram of ice is known as the latent heat of fusion of ice. And this heat is already detrmined and is equal to 334 J/g. Similarly, For water to convert into vapor at 100°C, it requires a certain amount of heat/energy to break its certain bonds and change its state into gas/vapor. This amount of heat per gram of water is known as the latent heat of vaporization of water, and it is equal to 2230 J/g.
Now, for one gram ice, 334 J heat is required for melting, hence for 73g of ice, 73x334 = 24382 J of heat is required.
Now, for one gram water, 2230 J heat is required for melting, hence for 73g of water, 73x2230 = 162790 J of heat is required.
Answer:
Yield of CO₂ = 79.1 %
Explanation:
This is the balanced reaction:
CaCO₃ (s) + 2HCl (aq) → CO₂ (g) + CaCl₂ (aq) + H₂O (l)
As the hydrochloric acid is in excess, the limiting reactant is the CaCO₃.
Let's convert the mass to moles
10.9 g / 100.08 g/mol = 0.109 moles
Ratio is 1:1, so 0.109 moles of CaCO₃ will produce the same amount of CO₂.
Let's determine the mass
0.109 moles of CO₂ . 44 g/mol = 4.79 g
Now, we can determine the yield
(yeild produced / theoretical yield) . 100 =
(3.79 / 4.79) . 100 = 79.1%
Answer:Water is attracted to the sodium chloride crystal because water is polar and has both a positive and a negative end. The positively charged sodium ions in the crystal attract the oxygen end of the water molecules because they are partially negative.
Plants can grow from sunlight and water.