Cho 3,04 gam hỗn hợp A gồm bột Fe3O4 và FeO vào dung dịch H, SO4 đặc, nóng dư. Sau khi phản ứng xảy ra hoàn toàn thu được 0,224L khí SO2 (đktc). Tính khối lượng mỗi chất trong

In all living cells dna controls cellular activities by

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?