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puteri [66]
3 years ago
13

Chemistry help!

Chemistry
1 answer:
Norma-Jean [14]3 years ago
3 0

Refer to the attachment.

Hope this helps you...

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The number of ions in 17.1 gm of aluminum sulphate Al2 (SO4)3 =….. [Molar mass of Al2 (SO4)3 = 342 gm]
katen-ka-za [31]

Answer:

1.51 X 10^23 ions

Explanation:

The number of ions in 17.1 gm of aluminum sulphate Al2 (SO4)3 =….. [Molar mass of Al2 (SO4)3 = 342 gm]

in one molecule of Al2(SO4)3 there are 5 ions 2 aluminum and 3 sulfate ions

in 2 molecules there are 2X5= 10 ions

in 10 molecules there are 10X5 = 50 ions

molar mass of Al2(SO4)3 = (2 X 26.98) +( 3 X 32.1) + (3 X 4 X 16.0 ) =342.gms = 17.1/342 =0.0500 moles

1  mole =6.02 X 10^23 molecules ( see Avogadros number)

0.0500 moles = 0.0500 X 6.02 X 10^23 molecules =

0.301 X 10^23 molecules = 3.01 X 10^22 molecules

We determined that each molecule of Al2(SO4)3 has 5 ions

so 3.01 X10^22 molecules have 5 X 3.01 X 10^22 ions =

15.05 X 10^22 ions = 1.51 X 10^23 ions

3 0
3 years ago
When salt is added to water, the entropy, S,
Dovator [93]

Answer:

C. number of particles

Explanation:

Entropy is the measure of disorderliness of a system. Remember that when you dissolve salt in water, you increase the number of particles in the solution. The greater the number of particles in solution, the greater the entropy of the  solution system.

Hence dissolution of a salt in water increases the entropy by increasing the number of particles in solution leading to the inequality; Ssolution > Swater + Ssalt.

5 0
3 years ago
Yvette mixed together water with calcium chloride in a beaker. She noticed that the temperature changed from 21oC to 37oC. She a
Rufina [12.5K]

Answer:

The temperature changed

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3 years ago
A 20.0-g sample of sugar is dissolved in 59.8 g of water. What is the concentration of the solution?
Romashka-Z-Leto [24]
The correct answer to the question is 25 percent by mass
4 0
3 years ago
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The parmo is a dish made from breaded meat and cheese sauce that originated in which english town?.
MA_775_DIABLO [31]

Answer:

Middlesbrough, North Yorkshire

,,Explanation:

4 0
2 years ago
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