Answer:
bottom
Explanation:
the ones with the greatest density will sink. if they have a lighter density than water, they will float. if they have about the same, they will stay in the middle. and if they have a higher density they will sink.
B would work. Get out a periodic table and check if you need too
Answer:
2.41 x 10²³ particles
Explanation:
Data Given:
no. of moles of KCl = 0.4 mol
no. of particles = ?
Solution:
To find number of particles we use following formula
number of moles = number of particles / Avogadro's number
as we have to find number of particles so rearrange the above equation
no. of particles = no. of moles x Avogadro's number . . . . . . . (1)
Where
Avogadro's number = 6.022 x 10²³ particles per mol
6.022 x 10²³ are number of particles in one mole of a substance. and this quantity is known as Avogadro's number
So,
put values in above equation 1
no. of particles = 0.4 mol x 6.022 x 10²³ (particles/mol)
no. of particles = 2.41 x 10²³ particles
So, 0.4 mol KCl contains 2.41 x 10²³ representative particles
Answer:
The postulate of Dalton's atomic theory that an atom is an indivisible particle and cannot be subdivided into smaller particles was later changed because atoms can be divided into neutrons, protons and electrons.
Explanation:
