que cambio tiene un clavo de hierro al tener contacto con una taza de agua una cucharada de sal y un chorrode vinagre porfavor es URGENTE

Select the correct answer. you have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. if the house circuit provides 120.0 volts, what is the current through this bulb?

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )