Explanation:
For Mg, (1.2 g Mg/24 g Mg) = 0.05 mol Mg.
For Cl, (3.55 g Cl/35.5 g Cl) = 0.1 mol Cl
So the ratio now is
Mg:Cl = 0.05 : 0.1 = 1:2
I got the 1:2 ratio by dividing both by the smallest number, which is 0.05 mol. Therefore, the empirical for formula of the substance is
They don't react with other elements under normal conditions as they are already in a low energy or stable state
The temperatures of the gases will not be equal.
- The ideal gas law specifies the mechanical behavior of ideal gases. It is capable of calculating the volume of gases produced or consumed.
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In chemical equations, this equation is widely used to convert between volumes and molar quantities.
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The ideal gas law states that the pressure, temperature, and volume of gas are related to each other
∵V is the same for both
∴T= same for both.
When n increases, T decreases, so, n is 1 for hydrogen gas and 0.5 for oxygen gas ,implying that oxygen gas will have more temperature than hydrogen gas since its number of moles are lower than hydrogen gas.
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Answer:
713.33 g/mol
Explanation:
The<em> freezing-point depression equation</em> is:
Where ΔT is the difference in temperature. The freezing point of pure benzonitrile is -12.75 °C, so ΔT = -12.75 - (-13.8) = 1.05 °C
Kf is the cryopscopic constant, which is 5.35 °C/m (as reported by the CRC Handbook).
m is the molality (moles compound X/kg benzonitrile).
So first we <u>calculate the molality</u>:
Now we <u>calculate the moles of X that were added</u>:
75 g ⇒ 75/1000 = 0.075 kg
- 0.196 m = mol X / 0.075 kg
Finally we <u>calculate the molar mass of X</u>, using the added mass:
- 10.5 g / 0.0147 mol = 713.33 g/mol