Glycerol (molar mass 92. 09 g/mol) has been suggested for use as an alternative fuel. The enthalpy of combustion, δh°comb , of glycerol is −1654 kj/mol. What mass of glycerol would need to be combusted to heat 500. 0 g of water from 20. 0°c to 100. 0°c ? (the specific heat capacity of water is 4. 184 j/(g⋅°c). Assume that all the heat released by the combustion reaction is absorbed by the water. ).

Rick is on a bicycle trip. every 4 days he bikes 230 km. if rick keeps this same pace for 16 days, how many kilometers will he bike?

Nathan is an ecologist. he’s studying the effect of secondary consumers on primary consumers. his current research focuses on a population of blue jays and crows. they eat caterpillars and mice. if the number of blue jays increases, what are the likely effects on other populations? 1the number of crows will increase. 2the number of mice will decrease. 3the number of mice will remain the same. 4the number of caterpillars will decrease.

Which economy enables demand for a product or service to drive all the businesses decisions business decisions are driven by demand in a ( an ) economy