2 atoms of Al
3 of S
4*3=12 of O
so total= 17
Answer:
ii. < iv. < i. < iii.
Explanation:
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At first, the entropy is lower in solid-phase systems since their particles are molecularly closer. Next, by knowing that the higher the temperature, the higher the entropy, the gaseous HCl at 25 ºC occupies the second place. After that, it is clear 2 moles of HCl have more entropy than just 1 since the larger the amount of mater the higher the entropy.
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<h3><u>Answer and Explanation;</u></h3>
The reaction between Nitrogen and Hydrogen to form ammonia gas is given by the equation;
N₂ + 3H₂ → 2NH₃
From the equation 1 mole of nitrogen gas (28 g) requires 3 moles of hydrogen gas (6 g) to form 2 moles of Ammonia gas (34 g).
Therefore;
Moles of Nitrogen = 14/28 = 0.5 mole
Moles of Ammonia = 16.1 /17 = 0.947 ≈ 1 moles
Therefore;
0.5 mole of nitrogen gas (14 g) requires 1.5 moles of hydrogen gas (3 g) to form 1 mole of Ammonia gas (17 g).
The balanced equation would be;
N₂ + 3H₂ → 2NH₃
It is important to establish the true weight of the crucible because it is a necessary reference point. Later, you will be weighing the crucible to determine how much of the products are present, so it's necessary to have the true tare weight of the crucible.
<span>The crucible is heated to be sure it is free of any moisture or other volatiles that might otherwise give a misleading weight. If you start out with the crucible absolutely clean and dry, (after heating) then you know that any additional weight must have come from the sample.</span>