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Nat2105 [25]
2 years ago
14

What’s boiling/melting point

Chemistry
2 answers:
bulgar [2K]2 years ago
3 0

Answer:

Melting point is the temperature at which solid and liquid phases of a substance are in equilibrium.

Boiling point is the temperature at which its vapour pressure is equal to the external pressure.

olga2289 [7]2 years ago
3 0

Answer:

melting point is the temperature at which a solid changes into a liquid.  

boiling point, temperature at which the pressure exerted by the surroundings upon a liquid is equaled by the pressure

Explanation:

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Imagine that you have a 6.50 L gas tank and a 4.50 L gas tank. You need to fill one tank with oxygen and the other with acetylen
Burka [1]

Answer:

We have to fill the acetylene tank with a pressure of 60.67 atm to ensure that you run out of each gas at the same time

Explanation:

Step 1: Data given

Volume of  tank 1 = 6.50 L = oxygen

Volume of tank 2 = 4.50 L = acetylene

Pressure in the oxygen tank = 105 atm

Step 2: The balanced equation

2 C2H2 + 5 O2 → 4 CO2 + 2 H2O

For 2 mol C2H2 we need 5 moles O2 to produce 4 moles CO2 and 2 moles H2O

 Step 3: Calculate the pressure of the acetylene tank

For 2 mol C2H2 we need 5 moles O2 to produce 4 moles CO2 and 2 moles H2O

This means for each 5 moles O2 we have 2 moles acetylene

Pressure (105 atm) * (2/5) * (6.50 / 4.50) = 60.67 atm

We have to fill the acetylene tank with a pressure of 60.67 atm to ensure that you run out of each gas at the same time

7 0
3 years ago
How many moles of I2 are there in 5.34 x 1025molecules of I2 ?
JulsSmile [24]

Explanation:

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3 0
3 years ago
Can you help me solve these using "typical” metric conversions <br> (?/?)(?/?)
mamaluj [8]

Answer:

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Explanation:

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3 0
4 years ago
Chlorine consists of two isotopes with masses of 35 and 37. If the average atomic mass of a sample of chlorine atoms is 35.5, wh
Elza [17]

Answer:

The ratio 35Cl/37Cl =  3/1

Explanation:

<u>Step 1:</u> Data given

Chlorine has 2 isotopes:

- mass = 35 g/mol

- mass = 37 g/mol

Average molar mass of chlorine = 35.5 grams

<u>Step 2: </u>Calculate the % of isotopes

35x + 37y = 35.5

x+y = 1 or x = 1-y

35(1-y) + 37y = 35.5

35-35y +37y = 35.5

0.5 = 2y

y = 0.25 = 37Cl

x = 1 - 0.25 = 0.75 = 35Cl

<u>Step 3: </u>

The ratio 35Cl/37Cl = 0.75/0.25 = 3/1

7 0
4 years ago
How to deal with a broken thermometer in chemistry lab ?
svetlana [45]

Isolate the lab immediately  mercury can be easily tracked throughout a lab by people walking on spill. laboratory staff can safely clean up small spill  . don't stamp on small pieces . carefully inspect the bench tops and floors before sitting. to  avoid hurting .

3 0
3 years ago
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