What is the maximum number of grams of PH3 that can be formed when 41.0 g of phosphorus reacts with 22.1 g of hydrogen to form PH3? (Hint: First, find the limiting reactant.)
P4(g) + 6H2(g) → 4PH3(g)
a. 45 g
b. 0.43 g
c. 270 g
d. 6.8 g

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

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un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este