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ycow [4]
3 years ago
7

Assuming all volume measurements are made at the same temperature and pressure, what volume of hydrogen gas is needed to react c

ompletely with 4.55 L of oxygen gas to produce water vapor?
Chemistry
1 answer:
Leno4ka [110]3 years ago
6 0

Answer:

9.1L

Explanation:

Firstly, to solve the problem, we need a balanced chemical equation.

2H2 + O2 ———> 2H2O

2 moles of hydrogen reacted one mole of oxygen. Now, we know that at STP, one mole of a gas occupies a volume of 22.4L, now let us get the number of moles in 4.55L of oxygen.

This means 4.55/22.4 = 0.203125 mole

Since in theory we have 2 moles of hydrogen reacting one mole of oxygen. Hence the number of moles of hydrogen we have is 0.203125 * 2 = 0.40625 mole

We now proceed to get the volume of hydrogen gas. Since 1 mole is 22.4L, then

0.40625 Is 0.40625 * 22.4 = 9.1L

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An aqueous solution of sodium sulfide is allowed to react with an aqueous solution of magnesium chloride.
olya-2409 [2.1K]

Answer : The correct option is, (b) 2Na^+

Explanation :

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The balanced molecular equation will be,

Na_2S(aq)+MgCl_2(aq)\rightarrow 2NaCl(aq)+MgS(s)

The complete ionic equation in separated aqueous solution will be,

2Na^+(aq)+S^{2-}(aq)+Mg^{2+}(aq)+2Cl^{-}(aq)\rightarrow 2Na^+(aq)+2Cl^{-}(aq)+MgS(s)

In this equation the species Na^+\text{ and }Cl^{-} are the spectator ions.

Hence, the complete ionic equation contains specie is 2Na^+

4 0
3 years ago
25. Energy is released during the fissionof Pu-239 atoms as a result of the(1) formation of covalent bonds(2) formation of ionic
Mariulka [41]
Answer ( 3 ) :

<span>conversion of matter to energy .
</span>
hope this helps!
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3 years ago
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Answer:C

Explanation:

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Which has more thermal energy, a bucketful of water at 21 Celsius degrees or a swimming pool at the same temperature?
Nutka1998 [239]

Swimming pool has more thermal energy than bucket of water at the same temperature.

<h3>What is heat capacity?</h3>

Heat capacity or thermal energy is the amount of heat that is use by an object to produce a unit change in temperature or the heat absorbed by an to produce a change in temperature.

The heat capacity of an object total depends on the objects mass and chemical composition. Because of swimming pool have larger mass, it had larger heat capacity than bucket full of water even at the same temperature.

Therefore, Swimming pool has more thermal energy than bucket of water at the same temperature.

For more details on heat capacity check the link below.

brainly.com/question/21406849

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3 years ago
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