A scientist measures the melting point of copper to be 1,100oC. Her reference book says the melting point of copper is 1,085oC. What is the percent error?

Silver tarnishes as silver metal reacts with hydrogen sulfide, h2s, in the air. in this reaction, dark silver sulfide, au2s, covers the surface of silver. when silver is polished, this coating of silver sulfide can be removed from the surface. this makes the silver shiny again. enter the coefficients that balance the tarnishing reaction equation. (type 1 for no coefficient.)

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.