The chemist the count the number of particles (Atoms, Molecules or Formula Unit) in a given number of moles of a substance by using following relationship.
Moles = # of Particles / 6.022 × 10²³
Or,
# of Particles = Moles × 6.022 × 10²³
So, from above relation it is found that 1 mole of any substance contains exactly 6.022 × 10²³ particles. Greater the number of moles greater will be the number of particles.
The formula for Silver (I) chloride is: AgCl
Answer:
The object with the greatest density
Explanation:
The object that will have the greatest mass from the given choices is the one with greatest density.
Density is the mass per unit volume of a substance;
Density = 
We can see that density is directly proportional to the mass and inversely proportional to the volume.
The more the mass and the lesser the volume, the higher the density.
So, since the volume is the same, and mass is directly proportional to density, the object having the highest density will have the greatest mass.
Answer:
100gmol⁻¹
Explanation:
Problem: To calculate the molecular mass of
KHCO₃
Solution
The molar mass of a substance is defined as the number of grams per mole of that substance.
To determine the molar mass of this compound we find:
> the component atomic masses
>we express it in gmol⁻¹
From the periodic table, the atomic masses of the elements in the given compound are:
K = 39g
H = 1g
C = 12g
O = 16g
Now let's add these numbers together:
KHCO₃ = [39 + 1 + 12 + (16x3)]
= 39 +13 +48
= 100g
Molar mass of KHCO₃ = 100gmol⁻¹
I think it is A!! Hope this helps.
