Calculate HRXN for the reaction: CaO(s)+CO2(g)CaCO3(s). Use the following reactions and given H's.
Ca(s)+CO2(g)+1/2 O2(g)--CaCO3(s) H=-812.8kJ
2 Ca(s)+O2(g)--2CaO(s) H=-1269.8kJ
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Which element is the least metallic between cadmium, silver, zinc, or iron?

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never