Se mezclan 200g de una disolucion de Sulfato De sodio (Na2SO4) al 10% m/m y d=1.09 g/ml con 120 ml de otra disolucion de la misma sal al 28% m/m y d=1.23 g/ml. Determina: 1.)concentracion m/m
2.)concentracion m/v de la disolucion final
3.)densidad de la disolucion final .

Which type of reaction always has an element and a compound as reactants

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate

Two metal blocks that have slightly different temperatures are placed next to one another. after five minutes, they both have lower but equal temperatures. according to the law of conservation of energy, what  most likelyhappened? energy was created inside the blocks. energy was destroyed inside the blocks. energy was absorbed into the blocks from outside the system. energy was transferred from the warmer block to the cooler block.