2Be + O2 = 2BeO
a. How many moles of BeO are made by 52.1 grams of Be?

b. How many grams of O2 will make 3.78 moles of BeO?

c. 245 grams of Be combine with how many moles of O2?

4. Equation: 4 Fe + 3 O2 = 2 Fe2O3
a. How many moles of iron will combine with 2.50 moles of oxygen O2?

b. How many moles of Fe2O3 is produced by 3.01 moles of oxygen O2?

c. 7.61 moles of iron will produce how many grams of Fe2O3?

d. 1650 grams of iron will produce how many moles of Fe2O3?

4. Equation: 4 Li + O2 = 2 Li2O
a. How many moles of lithium combine with 2.95 moles of oxygen O2?
b. How many moles of Li2O are produced from 13.5 moles of lithium?
c. 4.17 moles of oxygen O2 will produce how many grams of Li2O?
d. 5.28 grams of lithium will produce how many moles of Li2O?

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.