¿Cuál es el número total de electrones de valencia que presenta una molécula de ácido fosfórico? H3PO4

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Two nails have identical sizes and shapes. in one nail, 20 percent of the domains are lined up. in the other nail, 80 percent of the domains are lined up. which has stronger magnetic force? first answer gets brainliest!

What prefix multiplier is appropriate for reporting a measurement of 5.57 ×10−5 m?