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Zanzabum
3 years ago
11

Water is produced from the reaction of hydrogen and oxygen gas, according to the equation below. What is the excess reactant in

the reaction of 4.2 moles of hydrogen with 3.0 moles of oxygen?
2H2(g) + O2(g) = 2H2O(l)
Select one:
a.Water
b.Oxygen
c.No excess reactant
d.Hydrogen
Chemistry
2 answers:
insens350 [35]3 years ago
7 0

Answer:

2H2O means two molecules of water(H2O)

VashaNatasha [74]3 years ago
5 0

Answer:

b.Oxygen

this is the excess reactant

Why?

2 moles of hydrogen react with 1 mole of oxygen. So, 4.2 moles of hydrogen would need 2.1 moles of oxygen. There are 3.0 moles of oxygen. So, there are 0.9 moles of oxygen in excess.

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8 0
3 years ago
A chemistry student is given 700. mL of a clear aqueous solution at 26.° C. He is told an unknown amount of a certain compound
Alex73 [517]

Answer:

The correct answer is - yes, 4.57 g of solute per 100 ml of solution

Explanation:

The correct answer is yes we can calculate the solubility of X in the water at 22.0°C. The salt will remain after the evaporate from the dissolved and cooled down at 26°C.

Then, the amount of solute dissolved in the 700 ml solution at 26°C is the weighed precipitate: 0.032 kg = 32 g.

Then solublity will be :

32. g solute / 700 ml solution = y / 100 ml solution

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Thus, the answer is 4.57 g of solute per 100 ml of solution.

5 0
2 years ago
25,000cg is equal to _g
defon

Answer:

250 g

Explanation:

8 0
3 years ago
Trying to take the ged test please help me I’m stuck
JulsSmile [24]

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3 0
3 years ago
How many unpaired electrons are in the c 2 + ​ ion?
sladkih [1.3K]
Atomic number of C is 6. Hence, there are 6 electrons in carbon.

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Here, there are 2 unpaired electron. However, C2+ ions have 2 electrons less as compared to C.

Hence, electronic configuration of C 2+ ion is 1s2, 2s2. All the electrons are paired in this system. So there are no unpaired electrons in C 2+ ion. 
7 0
3 years ago
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