How many grmas of CaCO3 are present in a sample if there are 4. 52 x 10^24 atoms of carbon in that sample?

Chemistry

1 answer:

lorasvet [3.4K]3 years ago

3 0

No of atoms in 1 mol of CaCO3=6.023×10^23

$\\ \sf\bull\longmapsto No\:of\:moles=\dfrac{4.52\times 10^24}{6.023\times 10^23}$

$\\ \sf\bull\longmapsto No\:of\:moles=0.7mol$

Molar mass of CaCO3

$\\ \sf\bull\longmapsto 40u+12u+3(16u)$

$\\ \sf\bull\longmapsto 52u+48u$

$\\ \sf\bull\longmapsto 100g/mol$

Now

$\\ \sf\bull\longmapsto No\:of\;moles=\dfrac{Given\:Mass}{Molar\:Mass}$

$\\ \sf\bull\longmapsto Given\:mass=No\:of\:moles\times Molar\:Mass$

$\\ \sf\bull\longmapsto Given\:Mass=0.7(100)$

$\\ \sf\bull\longmapsto Given\:Mass=70g$

You might be interested in

Which isotope is most commonly used in the radioactive dating of the remains of organic materials?

Zarrin [17]

(1) 14C also known as Carbon-14, is used to radio-date organic materials as well as earth materials.

8 0

3 years ago

What mass of Cl2, in grams is contained in a 10.0L tank at 27oC and 3.50 atm pressure ? a. 1.42 grams b. 142 grams c. 1.01 kg d.

Evgen [1.6K]

Answer:

the correct answer is A

Explanation:

8 0

3 years ago

When trying to determine whether or not an atom gives up electrons easily, do chemists look at electronegativity or ionization p

Archy [21]

Here I found some info at Yahoo answers: https://answers.yahoo.com/question/index?qid=20090119191941AAB7oAb
The more electronegative an atom is the more unwilling it is to lose its electrons in a compound. If you do try to take a very EN atom away from a compound you'll need to apply a lot of energy for that to happen. I can give an example of a single atom though

Cl has 7 valence electron filled and every atom wants to be like nobles (noble gases), so it's not going to give an electron away b/c it's really close to being like a noble gas. Noble gases are the most stable atoms, which is why I say stability counts.

4 0

4 years ago

Many double-displacement reactions are enzyme-catalyzed via the "ping pong" mechanism, so called because the reactants appear to

zhenek [66]

Answer:

D. It will decrease by a factor of 4

Explanation:

According to the question , the equation follows :

$A+B\rightarrow C+D$

Rate law : This states the rate of reaction is directly proportional to concentration of reactants with each reactant raised to some power which may or may not be equal to the stoichiometeric coefficient.

$Rate\ \alpha [A]^{a}[B]^{b}$