What type of composition does an igneous rock have that contains mostly plagioclase feldspar and about 30 percent dark silicate minerals? a. basaltic b. granitic c. andesitic d. ultramafic

What is a metal replacement reaction

What does the symbol (–hfus) indicate in a phase change?

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.