- is a natural fibre
- has low elasticity
- is wrinkle free.
The trend of elemental radius increases from top to bottom and from right to left. This means Rb is greater than K. Incorporating the positive charges, K+ is smaller than K and Rb+ is smaller than Rb. Thus, the trend in increasing order is K+,K,Rb+,Rb.
Answer: 0.011 moles.
Explanation:-
To calculate the moles, we use the equation:

Given :
Mass of copper = 0.71 g
Molar mass of copper = 63.5 g/mol
Putting i the values, we get:

Thus the number of moles of copper in 0.71 g of copper is 0.011 moles.