11.625 moles of Na₂O are produced.
<h3>What do you mean by the term mole ?</h3>
A mole is defined as the amount of a substance that contains exactly 6.02214076 × 10²³ ‘elementary entities’ of the given substance.
It can be represented by the following formula:
n = N/NA
To calculate moles of Na₂ O produced are -:
40 gm of sodium
3.00 gm of oxygen
4 Na+ O₂----->2Na₂O
First calculate limiting reagent,
Stochiometric ratio,
a/b=4/1
=4
Molar ratio,
M/n=4/22/3/22=4/22×32/3
=1.93
As a/b>m/n
So, sodium is limiting reagent
4 Na+ O₂----->2Na₂O
As 32 g of O₂ produced =124 g of Na₂O
SO,
3 gm of O₂ produced =124×3/32
=11.625 gm
11.625 gm of Na₂O can be produced .
Learn more about mole ,here:
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The universe is made mostly of empty space nothing else even close.
Answer:
D. water currents melting the glaciers in Antarctica
Explanation:
The hydrosphere contains all the water on earth ranging from underground water, water in the air and water running on the surface of the earth. This water exist as liquid or ice. In liquid form, it includes water in the sea, ocean, river, underground water (wells, aquifers) and water vapor. In ice form, it includes: glaciers, ice caps and icebergs. The frozen part of the hydrosphere is known as the cryosphere.
There are interactions between the hydrosphere and cryosphere such as water currents melting the glaciers in Antarctica, melting of snows and ice.
Mass of Oxygen required : 24 grams
<h3>Further explanation</h3>
Given
3 moles of H
1.5 moles of O
3 moles of H₂O
Required
Mass of O
Solution
Reaction
2H₂ + O₂ ⇒ 2H₂O
Mass of Oxygen for 1.5 moles of O :
= mol x Ar O
= 1.5 moles x 16 g/mol
= 24 grams
B that’s is not a chemical change because I took the test
