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Verizon [17]
3 years ago
14

Two atoms that isotopes of one another must have number of what

Chemistry
1 answer:
ANTONII [103]3 years ago
3 0
The number of protons are same for the isotopes of an element.

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Chemical change? Need more context.
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Assume the solubility of benzoic acid in ice-cold water is 1.70 g/L and the solubility of benzoic acid in hot water is 68.0 g/L.
lana [24]

Answer:

The volume of water needed to recrystallize 0.700 g of benzoic acid is 10.29 mL.

Explanation:

For the complete recrystalization,

the amount of hot water should be such that, the benzoic acid is completely soluble in it.

As we are given that the solubility of benzoic acid in hot water is 68.0 g/L. Now we have to determine the volume of water is needed to recrystallize 0.700 g of benzoic acid.

we conclude that,

As, 68.0 grams of benzoic acid soluble in 1 L of water.

So, 0.700 grams of benzoic acid soluble in  of water.

The volume of water needed = 0.01029 L = 10.29 mL

conversion used : (1 L = 1000 mL)

Therefore, the volume of water needed to recrystallize 0.700 g of benzoic acid is 10.29 mL.

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How do you find the number of valence electrons
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Answer:LULULLUL

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Identify the activity that belongs in the field of chemistry.
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How many moles of oxygen molecules are present in 112ml of co2 at NTP?​
dexar [7]

In each mole of carbon dioxide there will be one mole of O₂.

Let us calculate the moles of carbon dioxide gas present first

The conditions are NTP it means , Temperature = 293 K and P = 1 atm

We will use ideal gas equation

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Putting values

moles=\frac{PV}{RT}=\frac{1X0.112}{0.0821X293}

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Thus moles of carbon dioxide will be 0.00466

The moles of O₂ = 0.00466

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