Answer:
Explanation:
From the question we are told that:
Initial volume
Final Volume
Work
Temperature
Generally the equation for Ideal gas is mathematically given by
Answer:
102g
Explanation:
To find the mass of ethanol formed, we first need to ensure that we have a balanced chemical equation. A balanced chemical equation is where the number of atoms of each element is the same on both sides of the equation (reactants and products). This is useful as only when a chemical equation is balanced, we can understand the relationship of the amount (moles) of reactant and products, or to put it simply, their relationship with one another.
In this case, the given equation is already balanced.
From the equation, the amount of ethanol produced is twice the amount of yeast present, or the same amount of carbon dioxide produced. Do note that amount refers to the number of moles here.
Mole= Mass ÷Mr
Mass= Mole ×Mr
<u>Method 1: using the </u><u>mass of glucose</u>
Mr of glucose
= 6(12) +12(1) +6(16)
= 180
Moles of glucose reacted
= 200 ÷180
= mol
Amount of ethanol formed: moles of glucose reacted= 2: 1
Amount of ethanol
=
= mol
Mass of ethanol
=
=
= 102 g (3 s.f.)
<u>Method 2: using </u><u>mass of carbon dioxide</u><u> produced</u>
Mole of carbon dioxide produced
= 97.7 ÷[12 +2(16)]
= 97.7 ÷44
= mol
Moles of ethanol: moles of carbon dioxide= 1: 1
Moles of ethanol formed= mol
Mass of ethanol formed
=
= 102 g (3 s.f.)
Thus, 102 g of ethanol are formed.
Additional:
For a similar question on mass and mole ratio, do check out the following!
Answer:
D. The particles move up and down without changing their position
Explanation:
These are gases. They are typically known for their randomness and no fixed arrangement of their atoms.
Gases generally assume the volumes of the containers they fill. They spread easily and readily to fill the volume where they occupy. Also, gases are readily compressible as they lack intermolecular attraction between their molecules.
70x0.2=5×x
X=2.8 ml
basically for these kind of questions you should use this formula: m1v1= m2v2
m is molar v is volume
Answer:
d. In a stable molecule having an even number of electrons, all electrons must be paired.
Explanation:
<em>Which of the following statements relating to molecular orbital (MO) theory is incorrect?</em>
<em>a. Combination of two 2p orbitals may result in either σ or π MOs.</em> TRUE. If the atomic orbitals overlap frontally, a σ MO is produced while if the atomic orbitals overlap laterally, a π MO is produced.
<em>b. Combination of two atomic orbitals produces one bonding and one antibonding MO.</em> TRUE. The bonding MO has less energy than the antibonding MO.
<em>c. A bonding MO is lower in energy than the two atomic orbitals from which it is formed.</em> TRUE. The bonding MO is more stable than the individual atomic orbitals.
<em>d. In a stable molecule having an even number of electrons, all electrons must be paired.</em> FALSE. Let's consider, for example, the molecular orbitals of O₂:
The electrons in the degenerated π* orbitals are not paired.
<em>e. A species with a bond order of zero will not be stable.</em> TRUE. For a species to be stable, the bond order must be higher than zero.