Sound waves are waves of growing larger and smaller, making it seem elastic through substances, such as air.
Atomic mass silicon = 28.085 u
1 mol Si ---------------- 28.085 g
? ------------------------ 245 g
245 x 1 / 28.085 => 8.72 mol
answer A
Answer:
Father - Mother
Sperm - Egg and those fertilized are called a Zygote
Explanation: