Answer: it’s number 2 add a catalyst
Hopefully this helped :)
Answer:10^27 atoms in an apple
Explanation:
Answer:
a. because it is an element
Explanation:
its pure because it only has one type of atom, making it an element

Here's the balanced equation for given Double displacement reaction ~

The products fored are : Lead Iodide ( PbI2 ) and Potassium Nitrate ( KNO3 )