How can energy change during a chemical reaction?
1 answer:
You might be interested in
Explanation:
Molecular mass:
Atomic masses:
N = 14g/mol H = 1g/mol S = 32g/mol O = 16g/mol Cl = 35.5g/mol
C = 12g/mol
NH₃ = 14 + 3(1) = 17g/mol
SO₂ = 32 + 2(16) = 64g/mol
Cl₂ = 2(35.5) = 71g/mol
N₂ = 14(2) = 28g/mol
CH₄ = 12 + (4 x 1) = 16g/mol
To solve this problem;
we need to derive an equation to find the molecular mass from the given densities on the table.
At STP;
Number of moles = eqn (i)
Also;
Number of moles = eqn (ii)
Now we can equate the two equations;
=
since density is known, we have to rewrite the relationship by making molar mass the subject of the expression:
Molar mass =
we know that;
Density =
Molar mass = density x 22.4
Now ;
Molar mass for 1.25g/L = 1.25 x 22.4 = 28g/mol; which is for N₂
Molar mass for 2.86g/L = 2.86 x 22.4 = 64.1g/mol; which is for SO₂
Molar mass for 0.714g/L = 0.714 x 22.4 = 16g/mol; which is for CH₄
learn more:
Gases at STP brainly.com/question/7795301
#learnwithBrainly
Answer:
27.70 is for the reaction.
Explanation:
The equilibrium constant of the reaction =
The expression of equilibrium constant is given by :
..[1]
The equilibrium constant expression for above reaction can be written as:
( from [1])
27.70 is for the reaction.
Answer:
Explanation:
Given :
Mass of a bar of lead = 115.2 g
Initial water level = 25 mL
Final water level = 35.5 mL
Difference in the water level = 35.5 - 25
= 10.5 mL
=
We know that when a body is submerged in water, it displaces its own volume of water.
Therefore, the volume of the lead bar = volume of the water displaced = 10.5 mL =
We know that mathematically, density is the ratio of mass of body to its volume.
Density of the lead bar is given by :
=