Answer:
0.00782 mol Pb
Explanation:
There are always 6.02 × 10²³ atoms in 1 mole of an element.
4.71 × 10²¹ atoms Pb × (1 mol Pb ÷ 6.02 × 10²³ atoms) = 0.00782 mol Pb
Answer:
Coal is not classified as a mineral because it comes from organic materials.
Explanation:
Minerals are naturally-formed substances that have a specific chemical makeup. They are created when elements combine. Minerals are <u>non-organic</u> and most have a set crystalline structure. Examples of minerals include diamond, azurite, beryl, and pyrite.
Answer:
Frequency and wavelength are inversely proportional to each other.
Explanation:
Frequency and wavelength are inversely proportional to each other. The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one-half the wavelength. For this reason, the wavelength ratio is the inverse of the frequency ratio.
Answer:C educated guess not completely sure
Explanation:
