Answer:
HCl
Explanation:
is a strong acI'd,,By contrast a weak acid like acetic acid (CH3COOH) does not dissociate well in water
Answer: Pure substances cannot be separated by physical means.
Explanation:
A pure substance is a substance which contains definite composition of only one type of component. Hence, it cannot be separated by physical means.
On the other hand, a mixture is a substance which contains two or more than two types of components and they can be separated by physical means as well.
Thus, option (a) is correct one that is pure substances cannot be separated by physical means.
Hello!
To find the mass of 7.602 x 10^24 atoms of lead, we need to find the number of moles first, then we will be able to find the mass. To find the moles, we need to divide the total number of atoms by Avogadro's number, which is 6.02 x 10^23. Also, one mole of lead is equal to it's atomic mass, which is 207.2 grams.
1). Find the number of moles
(7.602 x 10^24) / (6.02 x 10^23) ≈ 12.62790
Using significant figures, there are 12.8 moles of lead.
2). Find the mass of lead
12.8 moles x 207.2 grams = 2652.16 grams
Using significant figures, the mass of the given amount of lead is 2650 grams. (Exact value is 2652.16 grams).
