Answer:
The correct answer is 0.67 g H₂
Explanation:
Isopropyl alcohol (C₃H₇OH) can decompose to give acetone (C₂H₆OH) and hydrogen gas (H₂) according to the following chemical equation:
C₃H₇OH (g) ⇒ C₂H₆CO(g) + H₂(g)
We can calculate the initial mass of isopropyl alcohol from the density and volume data:
density = m/V = 0.785 g/mL
⇒ m = density x V = 0.785 g/mL x 25.6 mL = 20.096 g C₃H₇OH
According to the chemical equation 1 mol of C₃H₇OH gives 1 mol H₂. The molar mass of C₃H₇OH is:
molar mass C₃H₇OH = (12 g/mol x 3) + (1 g/mol x 7) + 16 g/mol + 1 g/mol = 60 g/mol
molar mass H₂ = 1 g/mol x 2 = 2 g/mol
So, we obtain: 2 g H₂ from 60 g C₃H₇OH. We multiply this stoichiometric ratio (2 g H₂/60 g C₃H₇OH) by the initial mass of C₃H₇OH to obtain the mass of H₂ is formed:
20.096 g C₃H₇OH x (2 g H₂/60 g C₃H₇OH) = 0.6698 g ≅ 0.67 g H₂
Answer:
NCl₃ + 2 H₂O = HNO₂ + 3 HCl
Explanation:
Let's consider the unbalanced equation showing the reaction between nitrogen trichloride and water to form nitrous acid and hydrochloric acid.
NCl₃ + H₂O = HNO₂ + HCl
We start balancing Cl atoms by multiplying HCl by 3.
NCl₃ + H₂O = HNO₂ + 3 HCl
Then, we balance O atoms by multiplying H₂O by 2.
NCl₃ + 2 H₂O = HNO₂ + 3 HCl
The equation is now balanced.
Like charges repel eachother. neutrons serve as a buffer so that the protons dont push each other apart
The answer is false i just did that question
The ratio would be 1 : 8. This is because 15 divided by 15 = 1, and 120 divided by 15 = 8.