Question

1) how much percent silica is present in the acid igneous rocks
2) earth crust contain dash percent feldspar

plzz ans

Answer 1

Answer:

63 percent of silica is present in the acid igneous rocks .

Earth crust contain over 50 percent of feldspar.

Explanation:

Answer 2

Answer:

63 percent

Answer: 63 percent of silica is present in the acid igneous rocks . Earth crust contain over 50 percent of feldspar

Lutgens and Edward J. Tarbuck, Earth's crust is made up of several elements: oxygen, 46.6 percent by weight; silicon, 27.7 percent; aluminum, 8.1 percent; iron, 5 percent; calcium, 3.6 percent; sodium, 2.8 percent, potassium, 2.6 percent, and magnesium, 2.1 percen