Answer:
458.8 grams of Al2O3 will be produced. The limiting reactant is Al
Explanation:
Step 1: Data given
Mass of Al = 243 grams
Atomic mass Al = 26.98 g/mol
STP = 1 atm and 273 K
Step 2: The balanced equation
4 Al + 3 O2 → 2 Al2O3
Step 3: Calculate moles Al
Moles Al = mass Al / molar mass Al
Moles Al = 243 grams / 26.98 g/mol
Moles Al = 9.00 moles
Step 4: Calculate moles O2
22.4 L = 1 mol
211 L = 9.42 moles
Step 4: Calculate moles the limiting reatant
For 4 moles Al we need 3 moles O2 to produce 2 moles Al2O3
Al is the limiting reactant. It will completely be consumed ( 9.00moles). O2 is in excess. There will react 3/4 * 9.00 = 6.75 moles
There will remain 9.42 - 6.75 = 2.67 moles
Step 5: Calculate mass Al2O3
For 4 moles Al we need 3 moles O2 to produce 2 moles Al2O3
Mass Al2O3 = moles Al2O3 * molar mass Al2O3
Mass Al2O3 = 4.50 moles * 101.96 g/mol
Mass Al2O3 = 458.8 grams
458.8 grams of Al2O3 will be produced. The limiting reactant is Al
ºF = ºC x 1.8 + 32
ºF = 17 x 1.8 + 32
ºF = 30.6 + 32
= 62.6ºF
hope this helps!
Answer:
yeah.. u cant only if heated the iced tea, breaking the sugar cube up has no effect on the dissolving process.
Answer:
One nucleophilic center
Explanation;
Nucleophile:
Nucleophile is a substance which is nucleus loving in nature (<em>Nucleo</em>; Nucleus , <em>phile</em>; Loving). It is known as a specie which donates a lone pair of electrons to electrophile (electron loving) in a chemical reaction.
Thus, Nucleophile is the region of higher electron density in a molecule and attacks on the lower electron density region of another molecule. Also, the nucleophile can also contain a negative charge.
Number of Nucleophilic centers in Methanol:
The chemical structure of Methanol is attached below and it can be observed that the oxygen atom is containing two lone pair of electrons. Hence, the oxygen atom can act as a nucleophilic center. Therefore, there is only one nucleophilic center in methanol.
H₃C-OH + H₃C-Br → H₃C-O-CH₃ + HBr
In above reaction methanol is acting as a nucleophile and is attacking on electrophilic center (Carbon) of methyl bromide yielding dimethyl ether.