Admins will remove my points for bot spamming answers so ima giveaway 1k+ points E

What is the percentage by mass of silicon (si) in iron aluminum silicate (fe3al2(sio4)3)?

What are the chemical names of these compounds? ke: mg3n2: reset next

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!