B will be the one I think tbh
440 hertz = 440/seconds
1/440 seconds = period of the sound wave.
so Answer is 2.2727272* 10^-3 second or 1/440 seconds
Answer:
Aluminum chromate, a yellow precipitate.
Explanation:

Answer:
mass is 110.3g
Explanation:
Density = mass/volume
density = 8.96 g/cm³
volume = 12.31cm³
mass = ?
density x volume = mass
8.96 x 12.31 = 110.2976g≈110.3g