Avogadro's number was calculated by determining the number of atoms in
a. 12.00 g of carbon-12
b. 14.00 g of carbon-12
c. 12.00 g of oxygen
d. 14.00 g of oxygen

Answer : The correct option is A.

Explanation :

One mole of substance means the amount of substance that contains as many particles in pure substance. So, one mole contains of particles. And this is also known as Avogadro's number.

Molar mass of carbon = 12 g/mole

Molar mass of oxygen = 16 g/mole

Moles of carbon-12 =

Moles of carbon-12 =

Moles of oxygen =

Moles of oxygen =

Therefore, the only option A which contain 1 mole.

1.consider the following balanced equation and answer parts a through. show calculations for each part.  

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)  

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.  

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3  

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.  

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.  

explanation: