The stannous fluoride in a 10.000 g sample of toothpaste was extracted and then precipitated
with lanthanum nitrate solution. if the mass of the precipitate is 0.105 g, what is the per-
centage of stannous fluoride in the toothpaste sample?
3 snf2 (aq) + 2 la(no3)3(aq) —>
laf3(s) + 3 sn(no3)2(aq)

heat or electricity in the atmosphere- c.

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.

false

because it does not have the potential to be entirely used up