The density of aluminum is 270 gml. How many aluminum atoms will be contained in a 1.57 Liter sample of the element?

9.45 × 10^21atoms

Explanation:

Density = mass/volume

According to the question, Density = 270g/L, v = 1.57L

Hence,

270 = m/15.7

m = 4239g

mole = mass/molar mass

Molar mass of Aluminum = 27g/mol

mole = 4239/27

mole = 157mol

Using Avogadro's number, number of atoms of Aluminum =

157 × 6.02 × 10^23

= 945.14 × 10^23

= 9.45 × 10^21atoms

the leaf is an organ of a typical plant, and the main functions are to complete photosynthesis and allow the plant to exchange gas, just like how we have the respiratory system. leaves have the stomata, which collects maintains co2 and o2 levels. this is necessary for cell metabolism. the leaf also collects sunlight using chloroplasts. succinctly, leaves own a pivotal role in sustaining plant life.

im pretty sure its b