Answer:
6.7 x 10²⁶molecules
Explanation:
Given parameters
Mass of CO₂ = 4.9kg = 4900g
Unknown:
Number of molecules = ?
Solution:
To find the number of molecules, we need to find the number of moles first.
Number of moles = 
Molar mass of CO₂ = 12 + 2(16) = 44g/mol
Number of moles =
= 111.36mole
A mole of substance is the quantity of substance that contains the avogadro's number of particles.
1 mole = 6.02 x 10²³molecules
111.36 moles = 111.36 x 6.02 x 10²³molecules = 6.7 x 10²⁶molecules
Answer:
b. 17,190
Explanation:
Using the formula for C-14 dating,

where Present Value N =1/8 of Parent Sample
Initial Value,
=1
Half Life,
=5730 years

=17,190
Therefore the fossil is about 17190 years old.
Answer:
Heat deals more with thermal energy whereas temperature deals with molecular kinetic energy.
Answer:
The last region should be right
Explanation: