During a reaction, the enthalpy of formation of an intermediate is -286 kJ/mol. During the reaction, 2 moles of the intermediate are produced. What
is the enthalpy value for this step of the reaction?
A:286 kJ
B:-286 kJ
C:-572 kJ
D:572 kJ

The p sub shell can hold up to 8 electrons in an atom. true or false?

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

What is bromine+calcium iodide--> calcium bromide +iodine balanced