Total weight of alloy is
67 + 20 = 87 g
67 g of which is gold
So % gold is 67/87* 100 = 77.01%
Answer:
acid; there ph value is mostly 7
base: there ph value can be more than 7 or less than 7
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



Answer:
Your answer is ATOM
Explanation:
Atoms consist of a nucleus made of protons and neutrons orbited by electrons. Atoms are the basic units of matter and the defining structure of elements.
Basically, they are the building block of life because everything made of matter has atoms