Answer:
There are 0.1 moles of solute in 250 mL of 0.4 M solution
Explanation:
because it is
Answer:10^27 atoms in an apple
Explanation:
Answer:


Explanation:
From the question we are told that:
Edge length of the unit cell 
a)
Generally the equation for The relationship between edge length and radius is mathematically given by

Therefore



b)
From the question we are told that:
Density 
Edge length of 
Therefore Volume is given as



Generally the equation for Mass is mathematically given by




Therefore Molarity is given as



Finally The atoms in a unit cell is



Explanation:
21 % of oxygen is present in air .
hope it is helpful to you
Answer:
D ≈ 4.86 g/mL
Explanation:
Density = Mass over Volume
D = m/V
Step 1: Define variables
m = 13.76 g
V = 2.83 mL
D = unknown
Step 2: Substitute and Evaluate for Density
D = 13.76 g/2.83 mL
D = 4.8621908127208480565371024734982 g/mL
Step 3: Simplify
We are given 3 sig figs.
4.8621908127208480565371024734982 g/mL ≈ 4.86 g/mL