Answer: CORRECT answer is A
Cl/S\Cl
Explanation:
A P EX
Answer:
I hope this helps
Explanation: Physical changes do not change a sbstances identity, it can consist of changes in color, size, etc.
Chemical changes on the completley changes the chemical makeup of a substance. Chemical changes can consist of combustion, corrosion, etc.
Answer:The decay decomposes dead organisms and creates fertile soil.
Explanation:it helps to digest food, and to recycle materials in our environment.
The amount of product obtained in a chemical reaction. The absolute yield can be given as the weight in grams or in moles.
Answer:
100.2g of CuI₂ you must add
Explanation:
Molality, m, is defined as the ratio between moles of solute and kg of solvent.
In the problem, you have a 0.694m of copper (II) iodide -CuI₂, molar mass: 317.35 g/mol-. That means there are 0.694 moles of CuI₂ per kg of water.
As you have 455g = 0.455kg of water -solvent-, moles of CuI₂ are:
0.455kg ₓ (0.694 moles CuI₂ / kg) = 0.316 moles of CuI₂
Using molar mass, grams of CuI₂ in the solution are:
0.316moles CuI₂ ₓ (317.35g / mol) =
<h3>100.2g of CuI₂ you must add</h3>
