Clap your hands each part word you eat and you will get your answer.
<span>Because it is defined such that the mass of Avogadro's number of particles (atoms or molecules) of a substance (the molar mass) is equal to the sum of the numerical values of the atomic masses of its constituent elements</span>
Answer:
The number of moles of B that will completely react with;
8 moles of A is 12 moles of B
9 moles of A is 13.5 moles of B
3 moles of A is 4.5 moles of B
10 moles of A is 15 moles of B
Explanation:
From the reaction, we have the mole ratio of the reactants is 2 moles of A combines with 3 moles of B to form 3 moles of C
Therefore, one mole of A which is 2 moles/2 will combine with 3/2 moles of B
Hence 8 moles of A will combine with 8×3/2 or 12 moles of B
9 moles of A will combine with 9×3/2 or 13.5 moles of B
3 moles of A will combine with 3×3/2 or 4.5 moles of B
10 moles of A will combine with 10×3/2 or 15 moles of B
Answer:
The correct answer is - 13.33 kJ of heat
Explanation:
To know which one is the limiting reagent, determine the number of moles of each reagent in order .
n(K) = mass/atomic weight = 1.41/39 = 0.036 moles
Density of ICl = Mass/Volume
3.24 = Mass/6.52
Mass of ICl = 21.12 g
n(ICl) = mass/molar mass = 21.12/162.35 = 0.130 moles
2 moles of K reacts with 1 mole of ICl
0.036 moles of K will react with = 0.036/2 = 0.018 moles of ICl
since the amount of moles of ICl is more than 0.018, it is in excess and hence K is the limiting reagent. Now, use the balance equation to determine the amount of heat liberated:
2 moles of K gives out -740.71 kJ of heat
1 mole of K will give out = -740.71/2 = 370.36 kJ of heat
0.036 moles of K will give out = 0.036 × 370.36 = 13.33 kJ of heat
Thus, the correct answer is - 13.33 kJ of heat
