Calculaţi randamentul reacţiei () de descompunere a calcarului( CaCO3) , ştiind că se supun descompunerii termice 4t de calcar de puritate 80% şi se obțin practic 1344 kg de var nestins(CaO) .

Which statement describes the appearance of a temperature-vs.-time graph? a horizontal line shows that the temperature increases at a constant rate over time. a vertical line shows that the temperature decreases at a constant rate over time. horizontal lines where the temperature is constant during phase changes connect upward-sloping lines where the temperature increases. horizontal lines where the temperature increases are connected by upward-sloping lines where the temperature is constant for each phase.

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure