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ch4aika [34]
3 years ago
14

What is the molas mass of lithium oxide li2o

Chemistry
2 answers:
gladu [14]3 years ago
7 0
The molar mass of lithium oxide is 
29.88 g/mol
Alexxandr [17]3 years ago
6 0

Explanation:

Atomic mass means the sum of total number of protons and neutrons present in an element.

Molar mass is defined as the mass of one mole of a compound present in grams.  

For example, molar mass of Li_{2}O is as follows.

      Molar mass of Li_{2}O = 2 × atomic mass of Li + atomic mass of O

                                     = 2 \times 6.94 g/mol + 16.0 g/mol

                                     = 13.88 g/mol + 16.0 g/mol

                                      = 29.88 g/mol

Thus, we can conclude that molar mass of Li_{2}O is 29.88 g/mol.

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When a saturated solution of NH4Br dissolved in 100 grams of water is cooled from 60°C to 30°C, how much NH4Br will precipitate?
stepladder [879]

Answer:

m_{precipitated}=24.8g

Explanation:

Hello,

In this case, since at 60 °C, 108 grams of ammonium bromide are completely dissolved in 100 grams of water for a saturated solution, once it is cooled to 30 °C, wherein only 83.2 grams are completely dissolved in 100 grams of water, the following mass will precipitate:

m_{precipitated}=108g-83.2g\\\\m_{precipitated}=24.8g

Best regards.

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3 years ago
The solution you identified in question (1) acts as a buffer due to reactions that occur within the solution when an acid or a b
weeeeeb [17]

Answer:

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Explanation:

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CH_3COONa\ (aq) + HCl\ (aq)\longrightarrow CH_3COOH\ (aq) + NaCl\ (aq)\\\\

 In this, the CH_3COOH is a weak acid so, it not completely dissociated.

CH_3COONa \ (aq) \ \ and \ NaCl were strong electrolytes they are completely dissociated.

The HCl is a strong acid so, it is completely dissociated So, the net ionic equation is:

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OLEGan [10]

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9.28

Explanation:

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