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muminat
3 years ago
15

If we wish to produce 35.4 moles of MgO. How many moles of O2 do we need?​

Chemistry
1 answer:
Olin [163]3 years ago
5 0
Answer : 2.5

#CarryOnLearning
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5. 16.3 g of NaCl is dissolved in water to make 1.75 L of solution. What is the molarity of this solution? A 0.159 M B 0.278 M C
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Answer: The molarity of this solution is 0.159 M.

Explanation:

Given: Mass of solute = 16.3 g

Volume = 1.75 L

Number of moles is defined as the mass of substance divided by its molar mass.

Hence, moles of NaCl (molar mass = 58.44 g/mol) ar calculated as follows.

Moles = \frac{mass}{molar mass}\\= \frac{16.3 g}{58.44 g/mol}\\= 0.278 mol

Molarity is the number of moles of a substance present in a liter of solution.

So, molarity of the given solution is calculated as follows.

Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.278 mol}{1.75}\\= 0.159 M

Thus, we can conclude that the molarity of this solution is 0.159 M.

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3 years ago
A specific combination of bonded atoms which always react in the same way is known as
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A specific combination of bonded atoms which always react in the same way, regardless of the particular carbon skeleton is known as the functional group. These are specific groups of atoms or bonds within organic molecules that accounts for the characteristic chemical reactions of those molecules.  Examples of functional groups are the Carbonyl group, alkyl Halides, aldehydes and ketones among others.
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For the reaction A+B↽−−⇀C+DA+B↽−−⇀C+D , assume that the standard change in free energy has a positive value. Changing the condit
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