No. of moles * molar mass of Cu2CrO4
2.55*335
Given :
Normal atom.
To Find :
The ratio of protons to electrons in all normal atoms.
Solution :
Here normal atom means neutral atoms i.e atoms whose charge is zero.
Atom charge is zero when number of proton are equal to number of electrons.
So,
Therefore, the ratio of protons to electrons in all normal atoms is 1.
Hence, this is the required solution.
Answer:
a person has a duty to use care in dealing with others, and failure to do so is negligence — R. I. Mehr — see also due care, negligence, standard of care.
Explanation:
Answer:
D. Gases were released to the atmosphere
Explanation:
In accordance to the law of conservation of mass, the total amount of reactants must equate the total amount of products at the end of the reaction because matter can not be lost or created. However, certain changes like gas evolution, formation of precipitate etc. indicates the occurrence of a chemical reaction.
In a chemical reaction, the total mass of the product(s) would be less than the total weight of the reactant(s) because GASES, which constituted part of the mass of the reaction, WERE RELEASED INTO THE ATMOSPHERE. However, if the mass of the gas released can be accounted for, the amount of reactants and products must balance.
1.64 L of SO₂ is produced when 2.35 g of Sulfur burns.
<u>Explanation:</u>
First of all, we need to write the balanced equation as,
S (s) + O₂ (g) → SO₂ (g)
Now we have to find the number of moles of sulfur by using its given mass and molar mass.
1 mol of Sulfur atoms = 32 g of sulfur
Now the given mass is 2.35 g.
So
1 mol of S produces 1 mol of SO₂.
So 0.073 mol of S produces 0.073 mol of SO₂.
At STP, 1 mol of SO₂ occupies a volume of 22.4 L.
0.073 mol of SO₂ occupies a volume of 22.4 × 0.073 = 1.64 L
So 1.64 L of SO₂ is produced.