5 the answer is B 6 the answer is D
Because it is used for building - making concrete and cement - and the manufacture of glass, steel and iron.
The correct answer is false. <span>Chemical equations are balanced not by changing the subscripts of the molecules instead by changing the coefficients of each molecule. However, the subscripts are helpful in balancing equations because they are used in counting the number of atoms or molecules.</span>
Answer:
the iron alone was dark brown and rectangular, whereas the iron-sulfur combination was a dark gray powder.
