Question

Barium acetate, Ba(C2H3O2)2, is a common barium salt that is highly poisonous. It was featured in a 2001 episode of Forensic Files, which recounted the murder of a man by his teenaged daughter. The LD50 (the dose that will be lethal to 50% of people that consume the compound) for barium acetate is 921 mg/kg of body weight.
A sample that contains 1.98x10^24 carbons atoms has a mass of ____ grams.

Answer 1

Answer:

209.68

Explanation:

The only number that is relevant (though the rest are quite interesting) is the last one 1.98 * 10^24

1 mole of Barium Acetate Contains 6.02*10^23 particles.

There are 4 moles of carbon to every mole of Barium Acetate.

1.98 * 10^24 atoms / (4*6.02*10^23)

0.8223 moles of Ba(C2H3O2)2

Ba =                 137

4C = 4*12          48

6H = 6*1              6

4O = 4*16           64

1mole                 255 grams

0.8223 * 255 = 209.68 grams  

I have used rounded masses for these elements depending on the periodic table you use. Go through the question with your masses to get a more accurate answer. My answer will not differ by much. It is a guide.