For them following reactions, the δh° rxn is not equal to δh°f for the product except for

a) 3mg(s)+n2(g)—> mg3n2(s)
b) 2ca(s)+o2(g)—> 2cao(s)
c)c2h2(g)+h2(g)—> c2h4(g)
d) 2c(graphite)+o2(g)—> 2co(g)
e) c(diamond)+o2(g)—> co2(g)

Calculate the number of moles of ethane in 100 grams

Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

Main expenses you plan on making payments on a new car too. you want to spend 15% of your monthly net pay on the car payment, insurance, registration, and taxes combined. what is your monthly car allowance? $149.46 $298.91 $448.37 $597.83