Answer:
agriculture
The raising of crops and animals for food, feed, fiber, fuel, or other useful products.
Explanation:
Answer:
c. a small amount
Explanation:
Trace elements (or trace metals) are minerals present in living tissues in small amounts.
Yes, they are called periods. Pls do you need a confirmation on this and if not what is the question?
This is known as adsorption. It's kinda similar to absorption, but it only takes place on the surface. Many people may get mixed up between the two, so be careful with the words!
Hope I helped!! xx
Answer:
3.2043 x 10²³
Explanation:
No. of Mole of lead (Pb) = 0.532 mol
No. of atoms of lead = ?
Solution:
Formula Used to calculate
no. of moles = numbers of particles (ions, molecules, atoms) /Avogadro's number
Avogadro's no. = 6.023 x10²³
So,
The formula could be written as
no. of atoms of lead Pb = no. of moles x 6.023 x10²³
Put the values in above formula
no. of atoms of lead Pb = 0.532 mol x 6.023 x10²³
no. of atoms of lead Pb = 3.2043 x 10²³
so 3.2043 x 10²³ atoms of lead are contained in 0.532 mole.
