Answer:
m(Na3AlF6)=57.6537 kg. Leftover mass will be 52.8644 kg
Explanation:
Al2O3(s)+6NaOH(l)+12HF(g)⟶2Na3AlF6+9H2O(g)
n(Al2O3)=m(Al2O3)/M(Al2O3)=14000/101.96=137.31 mol
n(NaOH)=m(NaOH)/M(NaOH)=59400/40=1485 mol
n(HF)=m(HF)/M(HF)=59400/20.01=2968 mol
To know what is in excess we divide moles by coefficients and compare numbers.
n(Al2O3) = 137.31 mol
n(NaOH)/6=247.5 mol
n(HF)/12=247.33 mol
so NaOH and HF are in excess
So
m(Na3AlF6)=n(Na3AlF6)*M(Na3AlF6)/1000=n(Al2O3)*2*M(Na3AlF6)/1000=57.6537 kg.
Leftover mass will be (n(NaOH)-n(Al2O3)*6)*40 + (n(HF)-n(Al2O3)*12)*20.01=26445.6+26418.8=52864.4 g= 52.8644 kg
1. 842g of NaOH will form 547.3 g of Al(OH)₃
2. The yield is 93.55%
<u>Explanation:</u>
3NaOH + Al → Al(OH)₃ + 3Na
1.
Molar mass of NaOH = 40 g/mol
Molar mass of Al = 27 g/mol
Molar mass of Al(OH)₃ = 78 g/mol
According to the balanced equation:
3 moles of NaOH requires 1 mole of Al to form 1 mole of Al(OH)₃
The ratio of NaOH : Al : Al(OH)₃ = 3 : 1 : 1
3 X 40 g of NaOH reacts with 27 g of Al to form 78 g of Al(OH)₃
120 g of NaOH + 27g of Al → 78 g of Al(OH)₃
120g of NaOH form 78g of Al(OH)₃
1g of NaOH will form g of Al(OH)₃
842g of NaOH will form of Al(OH)₃
= 547.3 g of Al(OH)₃
Therefore, 842g of NaOH will form 547.3 g of Al(OH)₃
2. Only 512 g of Al(OH)₃ is formed
Yield % = ?
Therefore, the yield is 93.55%
Answer:
10.875 miles
So 87 minutes
.125 miles per minute
So just multiply int his case
87*.125
You’d get 10.875
Answer:
a. <em><u>NH3</u></em>
<em><u>b</u></em><em><u>.</u></em>
<em><u>c.</u></em><em><u> </u></em><em><u>NaCl</u></em>
<em><u>d</u></em><em><u>.</u></em>
<em><u>e</u></em><em><u>.</u></em><em><u> </u></em><em><u>HCl</u></em>
<em><u>f</u></em><em><u>.</u></em><em><u> </u></em>
Answer:
B and C
Explanation:
Selective breeding is a procedure that involves the purposeful breeding of selected parents in order to give rise to offsprings with desired traits. Selective breeding procedure has its own advantages, which includes the ability to produce more animal products such as milk, meat etc, however, it has disadvantages.
The disadvantages include that:
- Selectively bred animals are more likely to have some health problem
- Some desirable traits become more common in a population.