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MariettaO [177]
2 years ago
8

How many moles of oxygen are in 52.5 grams of oxygen gas?

Chemistry
1 answer:
adell [148]2 years ago
3 0
An oxygen gas is a diatomic molecule which means that each molecule is composed of 2 atoms. Its symbol is O2. 

Each oxygen atom has a molar mass of 16 g/mol. The molar mass of oxygen gas is calculated below,
                         molar mass = 2 x (16 g/mol) = 32 g/mol

To determine the number of moles in 52.5 grams of oxygen, divide the given mass by the calculated molar mass.
 
                                 n = 52.5 grams / (32 gram/ mol)
                                     n = 1.64 moles

Thus, there are 1.64 moles of oxygen gas. 
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Explanation:

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3 years ago
A student used 1.168g of an unknown weak acid and titrated it against 28.75 mL of 0.105M NaOH to reach the equivalence point. Wh
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Answer:

The molar mass of the unknown acid is 386.8 g/mol

Explanation:

Step 1: Data given

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volume of NaOH = 28.75 mL = 0.02875 L

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Since we only know 1 equivalence point, we suppose the acid is monoprotic

Step 2: Calculate moles NaOH

Moles NaOH = molarity NaOH * volume NaOH

Moles NaOH = 0.105 M * 0.02875 L

Moles NaOH = 0.00302 moles

We need 0.00302 moles of weak acid to neutralize the NaOH

Step 3: Calculate molar mass of weak acid

Molar mass = mass / moles

Molar mass = 1.168 grams / 0.00302 moles

Molar mass = 386.8 g/mol

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3 0
3 years ago
Identify the units used to measure volume mass.
Strike441 [17]

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Volume: 1 liter is a little more than 1 quart

Mass: 1 kilogram is a little more than 2 pounds

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2 years ago
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rusak2 [61]

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Explanation:

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The kg is a quantity of mass used to measure the amount of matter in a substance.

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The kilo-  is a prefix that denotes 10³

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Now that we know this, we can convert:

   5.25 x 10⁻¹³kg  x \frac{1000g}{1kg}  x \frac{1000mg}{1g}   =  5. 25 x 10⁻¹³ x 10⁶mg

      =  5. 25 x 10⁻⁷mg

learn more:

Conversion brainly.com/question/1548911

#learnwithBrainly

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Which base has the lowest ionization constant (Kb)?
inysia [295]

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