Silicon carbide, an abrasive, is made by the reaction of silicon dioxide with graphite. SiO2 + 3C SiC + 2CO
If 100 g of SiO2 and 100 g of C are reacted as far as possible, which one of the following statements will be correct?
(a) 111 g of SiO2 will be left over.
(b) 44 g of SiO2 will be left over.
(c) 82 g of C will be left over.
(d) 40 g of C will be left over.
(e) Both reactants will be consumed completely, with none of either left over.

Which is true of transition metals when moving from left to right on the periodic table? the d sublevels are not filled across the period. the cation radii become larger across the period. atomic radii increase slightly and then start to decrease. atomic radii decrease slightly and then start to increase. o

The drawing represents the movement of particles in a substance. what changes of state can this substance undergo

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.