the molecular weight of an atom is equal to the weight in grams of 1 mole of that substance. Since Be is 9.01 amu, then 1 mol of Be is 9.01 g
Answer:
compounds
Explanation:
It is a substance formed when two or more. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of.
The answer is "...one kilogram of a 2.5% KI solution would contain 25 grams of KI."
Explanation:
A 2.5% by mass potassium iodide KI solution is equal to 2.5 grams of KI divided by 100 grams of the KI solution and then multiply by 100, that is
2.5% by mass = [2.5grams KI / (100grams KI solution)] *100
We multiply the mass of the solute and the mass of the solution by 10 each so that 100 grams becomes 1000 grams.
2.5% by mass = [(2.5grams KI * 10) / (100grams KI solution * 10)] *100 = (25grams KI / 1000grams KI solution) *100
Since 1000 grams is equal to 1 kg, the expression becomes
2.5% by mass = (25grams KI/1kg KI solution) *100
The expression above shows that a 2.5% by mass KI solution would contain 25 grams of potassium iodide in 1 kilogram KI solution.
