How many grams of beryllium are needed to produce 36.0 g of hydrogen assume an excess of waater be(s) + 2h2o(l) be(oh)2(aq) + h2(g)?

How much would the freezing point of water decrease if 4 mol of sugar were added to 1 kg of water(k=1.86 c/mol/kg for water and i=1 for sugar

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is the independent variable in this investigation? mass volume sample number substance density