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Leto [7]
3 years ago
5

Which of the following correctly shows the 3 steps of

Chemistry
1 answer:
natka813 [3]3 years ago
3 0

Answer:

D. Evaporating, condensing, collecting

Explanation:

The mixture is first heated so that the liquid needed to be collected can be evaporated into gas. Then, the gas is condensed back to liquid in a condenser. (usually the condenser is supplied with cold running water so speed up the condensation). Then, the liquid is collected after being condensed, in an apparatus such as a conical flask or a water bath.

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Which gas has approximately the same density as c2h6 at stp no nh3 h20 so2?
zmey [24]
1 mole of any gas occupy 22.4 L at STP (standard temperature and pressure, 0°C and 1 atm).

Let given gases be 1 mole. So their volumes will be the same, 22.4 liters.

Density is the ratio of mass to volume.

By formula; density= mass/volume; d=m/V

To find out masses of gases, do the mole calculation.

By formula; mole= mass/molar mass; n= m/M; m= n*M

Molar masses are calculated as
1. C₂H₆ (ethane)                 = 2*12 g/mol + 6*1 g/mol= 30 g/mol
2. NO (nitrogen monoxide) = 1*14 g/mol + 1*16 g/mol= 30 g/mol
3. NH₃ (ammonia)              = 1*14 g/mol + 3*1 g/mol= 17 g/mol
4. H₂O (water)                    = 2*1 g/mol + 1*16 g/mol= 18 g/mol
5. SO₂ (sulfur dioxide)        = 1*32 g/mol + 2*16 g/mol= 64 g/mol
Use Periodic Table to get atomic mass of elements.

Since their volumes are equal, compounds having the same molar mass will have the same density. 
Recall the formula d= m/V.

Ethane and nitrogen monoxide have the same density.

The answer is C₂H₆ and NO.
6 0
3 years ago
How many moles of Fe2O3 are in 203 g of the compound?
ruslelena [56]
The equation is :
moles=mass/molar mass
so, the mass is 203 and molar mass is 159.69 
You divide the 203 by 156.69 as the equation shows
so the moles is 1.27 mol. 
6 0
3 years ago
A chemical ____ is a process in which some substances change chemically into different substances
garik1379 [7]
Is reaction a choice?
6 0
1 year ago
Read 2 more answers
Convert 22.5 grams H2O to moles​
kenny6666 [7]

Answer:

18.01528

Explanation:

The answer is 18.01528.

4 0
3 years ago
Read 2 more answers
Will reward brainliest !!!
Anna [14]
The best answer choice here would be 'Combination'
8 0
3 years ago
Read 2 more answers
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