Is a particle that can not be broken down into simpler units.
a. compound
c. rock
b. substance
d. element

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘