Answer:
2.69 x 10²³ atoms
Explanation:
Given parameters:
Volume of sea water = 2.06mL
number of moles of gold = 0.446moles
unknown:
Number of atoms in the sea water
Solution:
The mole is a convenient unit of measuring quantities of particles. In a mole we have 6.02 x 10²³particles.
The mole can be defined as the amount of a substance contained in Avogadro's number of particles which is 6.02 x 10²³particles.
Here, the particles we want to determine is the number of atoms:
Number of atoms is given as:
Number of gold atoms = number of moles of gold x 6.02 x 10²³
Number of gold atoms = 0.446 x 6.02 x 10²³ = 2.69 x 10²³ atoms
Answer:
nucleus
Explanation:
it holds information needed to regulate most of the cell functions
Elastic collisions meant that there will be no change in the total momentum of the system and surrounding after collision.
<u>Explanation:</u>
Collision is the process where two or more bodies hit each other. So when they hit each other, transfer of energy will be occurring between them. In other words, the momentum can be changed after the collision. There are two kinds of collision.
- elastic collision
- inelastic collision
The elastic collision are those which will not undergo any change in the total momentum after collision. This means that the sum of momentum of the objects before collision will be equal to the sum of momentum of the objects after collision. Thus, there will be no change in the total momentum of the object after collision in case of elastic collision.
C₈H₁₈ + F₂ -----hV----> C₈H₁₇F + HF
