Answer:
0.5 moles
Explanation:
At STP,
<u><em>Every 22.4 L of carbon dioxide contains 1 mole of gas.</em></u>
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Solving :
⇒ 22.4 L : 1 mole
⇒ 22.4 × 0.5 : 1 × 0.5
⇒ 11.2 L : 0.5 moles
Answer : The mass of oxygen will be, 36.8 grams
Solution : Given,
Moles of water = 2.30 moles
Molar mass of = 32 g/mole
First we have to calculate the moles of oxygen.
The balanced chemical reaction will be,
From the balanced reaction we conclude that
2 moles of water decomposes to give 1 mole of
2.30 moles of water decomposes to give moles of
Now we have to calculate the mass of oxygen.
Therefore, the mass of oxygen will be, 36.8 grams
<u>Answer:</u> The volume of concentrated hydrochloric acid required is 16.53 mL
<u>Explanation:</u>
To calculate the volume of concentrated solution, we use the equation:
where,
are the molarity and volume of the concentrated solution
are the molarity and volume of diluted solution
We are given:
Conversion factor: 1 L = 1000 mL
Putting values in above equation, we get:
Hence, the volume of concentrated hydrochloric acid required is 16.53 mL
Answer:
For a digital scale, the uncertainty is ± 1 in the least significant digit.
Explanation:
First, the sugar dissolves into small sugar molecules, Then fills in the spaces in between the water molecules thus, making Sugar water.
I hope that answered your question and has come to your help.