Answer:
d. 12.3 grams of Al2O3
Explanation:
The balanced chemical equation of this chemical reaction is as follows:
4Al + 3O2 --> 2Al2O3
Based on the balanced equation, 4 moles of aluminum (limiting reagent) reacts to form 2 moles of aluminum oxide (Al2O3).
First, we need to convert the mass of aluminum to moles using the formula;
mole = mass/molar mass
Molar mass of Al = 27g/mol
mole = 6.50/27
= 0.241mol of Al.
Hence, if 4 moles of aluminum (limiting reagent) reacts to form 2 moles of aluminum oxide (Al2O3).
Then, 0.241mol of Al will produce (0.241 × 2/4) = 0.241/2 = 0.121mol of Al2O3.
Convert this mole value to molar mass using mole = mass/molar mass
Molar mass of Al2O3 = 27(2) + 16(3)
= 54 + 48
= 102g/mol
mass = molar mass × mole
mass = 102 × 0.121
mass of Al2O3 = 12.34grams.
Entropy is measure of disorder in system. Higher the disorder, greater the entropy.
Pair 1: NO2 (g) and N2O4 (g)
In the above case, entropy of N2O4 is more as compared to NO2, because N2O4 has more number of bonds as compared to NO2. So large number of vibrational energy levels are available for energy distribution which results in increasing entropy.
Pair 2: CH3OCH3(l) and CH3CH2OH(l)
Above compounds are structure isomers. They have same number of bonds and vibrational energy levels. However, presence of -OH group in CH3CH2OH results in intermolecular interaction via H bonding. This results in an ordered structure in CH3CH2OH as compared to CH3OCH3. Due to this entropy in CH3CH2OH is lower as compared to CH3OCH3.
Pair 3: HCl(g) and HBr(g)
In present case, HBr will have higher entropy as compared to HCl, because of larger number of sub-atomic particles in Br. Also, the higher molecular mass of HBr favors larger entropy.
Answer: The fraction of the bonding that is ionic is 0.08875.
Explanation:
Percentage ionic character is calculated using the formula:
% ionic character =![[16\times \Delta E_N + 3.5\times (\Delta E_N)^2]](https://tex.z-dn.net/?f=%5B16%5Ctimes%20%5CDelta%20E_N%20%2B%203.5%5Ctimes%20%28%5CDelta%20E_N%29%5E2%5D)
Where, 
= electronegativity difference
Given : The electronegativities for Ga and P are 1.6 and 2.1 respectively.
Thus = electronegativity of phosphorous - electronegativity of galium = 2.1 -1.6 = 0.5
Therefore,
%ionic character = ![[16\times 0.5 + 3.5\times (0.5)^2]=8.875](https://tex.z-dn.net/?f=%5B16%5Ctimes%200.5%20%2B%203.5%5Ctimes%20%280.5%29%5E2%5D%3D8.875)
Fraction of ionic bond =
The fraction of the bonding that is ionic is 0.08875.
In order to get all the amino acids that the body needs to produce proteins, one must eat and drink the necessary food containing amino acids. Amino acids are what comprises proteins thus, in order to obtain the average amount of amino acid, make sure that you have an enough intake of foods rich in proteins.
