Answer:
The answer to your question is 177.8 g of NaOH
Explanation:
Balanced chemical reaction
2 Na + 2 H₂O ⇒ 2 NaOH + H₂
Data
Grams of H₂ = ?
Mass of Na = 120 g
Mass of H₂O = 80
Process
1.- Calculate the limiting reactant
Molar mass of Na = 2 x 23 = 46 g
Molar mass of H₂O = 2 x 18 = 36 g
Theoretical proportion Na/H₂O = 46/36 = 1.28
Experimental proportion Na/H₂O = 120/80 = 1.5
As the experimental proportion increases, we conclude that the limiting reactant is the water.
2.- Calculate the mass of hydrogen
Molar mass of NaOH = 2[23 + 16 + 1] = 80 g
36 g of H₂O ------------------ 80 g of NaOH
80 g of H₂O ----------------- x
x = (80 x 80) / 36
x = 6400 / 36
x = 177.8 g of NaOH
None. To bind with an hydrogem atom, the carbon needs to ''share'' one of it's valence electron's with the hydrogen's valence electron. Therefore, forming 4 bounds means the carbon atom will share it's 4 valence electrons and there will be no lone electrons.
Answer:
V₂ =31.8 mL
Explanation:
Given data:
Initial volume of gas = 45 mL
Initial temperature = 135°C (135+273 =408 K)
Final temperature = 15°C (15+273 =288 K)
Final volume of gas = ?
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 45 mL × 288 K / 408 k
V₂ = 12960 mL.K / 408 K
V₂ =31.8 mL
Answer:
Add 10 mL of ethanol into a 100 mL volumetric flask. Final volume of diluted ethanol solution is 100 mL.
Explanation:
We need to use a flask of 100 mL to make a 10 times dilution of the 10 mL of ethanol that we have. To prepare this solution we have to measure with a pipet 10 mL of ethanol and place it into volumetric flask of 100 mL. Then we add destiled water to complete the volume of the final ethanol solution.
Then the final volume of the diluted solution of ethanol will be 100 mL.
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