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Galina-37 [17]
3 years ago
5

The number of grams of helium in a balloon at a pressure of 99.8 kPa, a temperature of 301 K, and a volume of 0.785 L would be

Chemistry
1 answer:
Tresset [83]3 years ago
3 0
Use formula
pV=nRT
in formula n=m/M
you have to find m



P=99.8/101.325
v=0.785
R=0.0821
T=301
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Question 6: Iron metal and chlorine gas react to form iron (III) chloride: 2 Fe(s) + 3 Cl2 (g) → 2 FeCl3 (s)
Bas_tet [7]

10 gm of Fe will consumes 19 gm Cl₂ and will produces 29 gm FeCl₃.

What ois Theoretical yield ?

The quantity of a product obtained from a reaction is expressed in terms of the yield of the reaction.

The amount of product predicted by stoichiometry is called the theoretical yield, whereas the amount obtained actually is called the actual yield.

  • As 2 moles (111.68 g) of Fe consumes 213 gm of Cl₂ to produce 2FeCl₃

Therefore ,

10 gm of Fe will consumes = 213 / 111.68 x 10 = 19 gm Cl₂

  • As 2 moles (111.68 g) of Fe produces 2 mole (324 gm) of FeCl₃

Therefore ,

10 gm of Fe will produces = 324 / 111.68 x 10 = 29 gm FeCl₃

Hence , 10 gm of Fe will consumes 19 gm Cl₂ and will produces 29 gm FeCl₃.

Learn more about Theoretical yield here ;

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4 0
2 years ago
As you move to a higher elevation (e.g. in the mountains), the air pressure drops significantly. In turn,
soldi70 [24.7K]
The answer is C ( The evaporation rate of water increases at all temperatures causing an increase in volume.)                           
3 0
2 years ago
Based on molecular orbital theory, the bond orders of the H—H bonds in H 2 , H 2 + , and H 2 - are _________, respectively
vodka [1.7K]

Answer:

H2-1

H2+-1/2

H22- zero

Explanation:

Bond order= Bonding electrons-antibonding electrons/2

In H2, there are two bonding electrons and no antibonding electrons. In H2+ there is only one bonding electron and no antibonding electron while in H22- there are two bonding and two antibonding electrons respectively.

4 0
3 years ago
In which situation is chemical energy being converted to another form of energy? a lamp plugged into the electric grid a flutter
Irina18 [472]
OK so the answer to your question will be option D. because chemical energy is being transferred as heat and light
5 0
3 years ago
What is the mass of iron shot, with a dean sigh of 7.92 g/mL. The shot is added to a graduated cylinder containing 25.80 mL of w
VikaD [51]

Answer:

The answer is

<h2>184.54 g</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

density of iron = 7.92 g/mL

volume = final volume of water - initial volume of water

volume = 49.10 - 25.80

Volume = 23.3 mL

It's mass is

mass = 7.92 × 23.3 = 184.536

We have the final answer as

<h3>184.54 g</h3>

Hope this helps you

7 0
3 years ago
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