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skad [1K]
3 years ago
15

229th

Chemistry
1 answer:
Gelneren [198K]3 years ago
8 0

Answer:

o thats pretty cool for points its a new moon

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In an isothermal process, 1.59 moles of an ideal gas is compressed to one-fifth of its initial volume at 285 K. What quantity of
Nataly_w [17]

Answer:

−6063.54 J  of heat is removed from the system during this process.

Explanation:

Given that :

in an isothermal process

number of moles of an ideal gas =  1.59 moles

which is compressed to one- fifth of its initial volume

Let say the initial volume = x

the final volume will be = x/5

Temperature = 285 K

The objective is to determine what quantity of heat is added to, or removed from, the system during this process.

In an isothermal process;

q = w

where ;

w = nRT In (V₂/V₁)

w = 1.59 × 8.314 × 285 × In (x/5 /x)

w = 1.59 × 8.314 × 285 × In (1/5)

w = −6063.54 J

Thus;  −6063.54 J  of heat is removed from the system during this process.

5 0
3 years ago
Determine the theoretical yield of H2S (in moles) if 4.0 molAl2S3 and 4.0 mol H2O are reacted according to the followingbalanced
mamaluj [8]

Answer:

The theoretical yield of the hydrogen sulfide is 68.0 grams.

Explanation:

Al_2S_3(s)+6H_2O(l)\rightarrow 2Al(OH)_3(s)+3H_2S(g)

Moles of aluminum sulfide = 4.0 mol

Moles of water = 4.0 mol

According to reaction, 6 moles of water reacts with 1 mole of aluminum sulfide,then 4 moles of water will react with :

\frac{1}{6}\times 4 mol=1.5 mol of aluminum sulfide

1.5 moles aluminum sulfide < 4 moles  aluminum sulfide

This means that water is present in limiting amount and aluminum sulfide is in excess amount.So, amount of hydrogen sulfide will depend upon moles of water.

According to reaction, 6 moles of water gives with 3 mole of hydrogen sulfide,then 4 moles of water will give :

\frac{3}{6}\times 4 mol=2.0 mol of hydrogen sulfide

Mass of hydrogen sulfide:

2.0 mol × 34 g/mol = 68.0 g

The theoretical yield of the hydrogen sulfide is 68.0 grams.

7 0
3 years ago
What are the possible orbitals for n = 3?
Tanzania [10]

Answer:The n = 3 shell, for example, contains three subshells: the 3s, 3p, and 3d orbitals. There is only one orbital in the n = 1 shell because there is only one way in which a sphere can be oriented in space.

Explanation:hope this helps:D

3 0
3 years ago
What happened when you add 5 ml of copper sulfate to 5 ml of calcium chloride? Does a chemical change occurs?
iragen [17]

Answer:

Yes, a chemical change occurs.

Explanation:

CuSO_{4} + CaCl_{2} = CuCl_{2} + CaSO_{4}

CaSO4 is insoluble in the water, so a chemical reaction or chemical change occurs.

8 0
4 years ago
Solubility. In each of the following pairs of amino acids, identify which amino acid would be most soluble in water: (a) Ala, Le
Svetllana [295]

Answer:

(a) Ala; (b) Tyr; (c) Ser; (d) His

Explanation:

The general formula for an amino acid is NH₂-CH(R)-COOH

The differences among the different amino acids is caused by the side groups R.

(a) Ala, Leu

Ala: R =                 CH₃-

Leu: R = (CH₃)₂CHCH₂-

Leucine has a larger hydrophobic side group. It should be the less soluble of the pair,

Alanine is the more soluble amino acid.

(b) Tyr, Phe

Tyr: R = HOC₆H₄CH₂-

Phe: R =      C₆H₅CH₂-

Tyrosine has a polar OH group. It can form hydrogen bonds with water.

Tyrosine is the more soluble amino acid.

(c) Ser, Ala

Ser: R = HOCH₂-

Ala: R =       CH₃-

Serine has a polar OH group. It can form hydrogen bonds with water.

Serine is the more soluble amino acid.

(d) Trp, His

Trp: R =       Indole-CH₂-

His: R = Imidazole-CH₂-

Tryptophan has a large aromatic hydrophobic side chain.

Histidine is a basic amino acid. At pH 7 it exists mainly as the anion NH₂CHRCOO⁻, which is hydrophilic.

Histidine is the more soluble amino acid.

4 0
3 years ago
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