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Zanzabum
3 years ago
9

How many grams are there in 7.5x10^23 molecules of H2SO4

Chemistry
1 answer:
horsena [70]3 years ago
6 0
Moles of H2SO4= 7.5x10^23/ 6.02x10^23 = 1.25 (3sf) moles of H2SO4

Mass of 1 mole of H2SO4= 98.1g

Therefore mass of 7.5x10^23 molecules of H2SO4= 122.63g 
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31. calculate the amount of energy released as heat by the freezing of 13.3 g of a liquid substance, given that the substance ha
spin [16.1K]

From the calculations, the heat of fusion of the substance is 0.73 kJ

<h3>What is is the heat of freezing?</h3>

The heat of freezing is the energy released when the substance is converted from liquid to solid.

Now we know that the molar mass of the substance is 82.9 g/mol  hence the number of moles of the substance is;  13.3 g /82.9 g/mol  = 0.16 moles

Now the heat of fusion shall be;

H = 4.60 kj/mol * 0.16 moles

H = 0.73 kJ

Learn more about freezing:brainly.com/question/3121416

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5 0
1 year ago
At standard pressure, the difference between the freezing point and the boiling point of water, in Kelvin degrees, is D. 373 A.
Sergio [31]
The answer to this question is A. 100
 

7 0
3 years ago
Plz hurry fast I need help !!!
Vikki [24]

Answer:

USE SOCRATIC

Explanation:

5 0
3 years ago
Read 2 more answers
H20 (s) -&gt; h20 (g)<br> endothermic or exothermic
noname [10]

Answer:

Endothermic.

Explanation:

Hello there!

In this case, it is necessary to keep in mind that exothermic processes are characterized by the release of energy and the endothermic processes by the absorption of heat. In such a way, every process from solid to liquid or gas is endothermic as they require energy to separate the molecules and therefore turn out in the phase change. On the other hand, every process from gas to liquid or solid is exothermic as heat is released to rejoin the molecules and produce the phase change.

Therefore, since solid water molecules tend to be well-arranged, it is necessary to add heat to the system to produce the phase change until gas; in such a way, this process is endothermic as energy must be absorbed by the ice.

Best regards!

3 0
3 years ago
5)a strip of paper has a length of 14cm what is the lengh of the strip of paper in mm, and in km
I am Lyosha [343]
A) 1 cm ---------- 10 mm
    14 cm ---------- ?

14 x 10 / 1 => 140 mm
-------------------------------------------------------

b) 1 cm ----------- 0.00001 km
    14 cm ---------- ?

14 x 0.00001 / 1 => 0.00014 km

7 0
3 years ago
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