Answer:
The molar mass of is 394.719 g/mol.
Explanation:
This was on my periodic table.
Answer:
Explanation:
Hello!
In this case, for the first reaction we need to focus on, the neutralization of magnesium hydroxide by phosphoric acid, we can write up the following equation:
Whereas the acid and base react in a 3:2 mole ratio; thus, we can write:
Now, solving for the concentration of the magnesium hydroxide solution we get:
Now, for the reaction between hydrochloric acid and magnesium hydroxide we have:
Therefore, solving for the concentration of the hydrochloric acid solution we get:
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Answer:
7670 joules
Explanation:
Molar heat → 40.6 kJ / mol
1 mol of water occupies 18 g, but we have only 3.4 g. Let's make a rule of three:
18 g of H₂O release 40.6 kJ of heat
Then, 3.4 g will release (3.4 . 40.6) / 18 = 7.67 kJ
If we convert the kJ to J → 7.67 kJ . 1000 J / 1 kJ = 7670 Joules
We can also do this:
If water is already at 100°C, we apply the latent heat (heat that is relased in a change of state)
Q = 2256 J/g . 3.4 g → 7670.4 J
O' is the molecule that is associated with oxygen and hydrogen