Answer:
762.60 g
Explanation:
In order to convert from moles of a substance into grams, we need to multiply the number of moles by the substance's molar mass:
- Moles * Molar Mass = Grams
With the above information in mind, we can <em>use the data given by the problem</em> and <u>calculate how many grams are there in 12 moles of Cu</u>:
- 12 mol * 63.55 g/mol = 762.60 g
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.
Answer:
The substance that dissolves
Explanation:
Solute is the substance that disappears into a liquid. For example,when salt dissolves in water,the salt is the solute because it is the substance that saluted.
Answer:
4 atmospheric pressure is needed to get a volume of 25 litres
It is a physical change because you can not put it back like it was
