Answer:
a. 50KCal
b. 400KCal
c. Same as (a) above
Explanation:
Given
To raise the temperature of 1kg of liquid water at 1°C requires 1KCal
To raise the temperature of 1kg of ice or water vapour by 1°C requires 0.5KCal
To melt 1kg of ice at 0°C requires 80KCal
To evaporate 1kg of liquid water sitting at 100°C requires 540KCal
a. How much heat is required to raise the temperature of 5 kg of liquid water by 20 C?
To raise the temperature of 5 kg of ice by 20°C requires:
5 kg * (0.5 kcal / kgC) * 20C
= 50 KCal
b. How much heat is required to melt 5 kg of ice at 0 C?
To melt an ice of 5 kg of ice at 0 C requires:
5 kg * (80 kcal / kg)
= 400 KCal
c. Same as (a) above
Answer:
thhe anwer is d
Explanation:
the answer is d just took the quiz got 100 on edge 2022
Answer:
12.3 g.
Explanation:
Whenever a similar problem is involved, we need to write the chemical reaction representing the net change, as well as due to the fact that we need to know the stoichiometry involved.
Sodium chloride reacts with silver nitrate in a double displacement reaction to produce a cation exchange, that is, we produce silver chloride and sodium nitrate given by the following balanced chemical equation:

According to the balanced chemical equation, the molar stoichiometry of silver nitrate to sodium chloride is 1 : 1.
Let's find moles of each substance to determine the limiting reactant. To do this, divide mass of each component by its molar mass:

Since the stoichiometry of this reaction is 1 : 1, we can compare the moles directly. Notice that the number of moles of NaCl is lower than the number of moles of silver nitrate. This means NaCl is the limiting reactant.
According to the balanced chemical equation, 1 mole of NaCl produces 1 mole of AgCl, so the amount of AgCl would be:

In order to convert this into mass, let's multiply by the molar mass of AgCl:

Ethene belongs to class of
unsaturated hydrocarbons called as
Alkenes. Alkene contains a
double bond between two carbon atoms. And the general formula for alkene is,
CnH2nWhereas in Ethene, n = 2, so
C₂H₄
Therefore, in ethene there are two carbon atoms doubly bonded to each other via
one sigma and
one pi bond. Also each carbon atom is further covalently bonded to
two hydrogen atoms via sigma bond as shown below,