Which group of elements can act as semiconductors?

Water is important for the of cells. a: size, shape, and temperature b: temperature, color, and odor c: color, odor, and size d: shape, temperature, and color

In the following redox reaction which is the oxidizing agent and which is the reducing agent? alcl3 + na nacl + al

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3 -> a2cr(no3)3 + a3ag2so4