Answer:
The chemical composition of carbohydrates includes two oxygens and one hydrogen for every carbon present.
Explanation:
Generally, each carbon atom in the carbohydrates has one oxygen molecule and 1 – 3 hydrogen (depending on the position of the carbon in the chain and also the types of bonds around it). Usually, the ratio of hydrogen to oxygen in carbohydrates is approximately 2:1 Example of carbohydrates are starch and glycogen.
Answer:
The relative strength of the four intermolecular forces is: Ionic > Hydrogen bonding > dipole dipole > Van der Waals dispersion forces. ...
Boiling points increase as the number of carbons is increased.
Branching decreases boiling point.
Explanation:
Fire burning is a combustion reaction, which is a type of reaction that is always EXOthermic (meaning it gives off heat). When the carbon in the wood reacts with the oxygen in the air, it forms CO2 and H2O, releasing heat in the process that escapes the fire place and transfers out to the room.
As for the spread of heat:
“A fire can spread by radiation when the heat travels through electromagnetic waves in the air”
-FireSealsDirect
Answer:
4.43 g Fe
Explanation:
To find the mass of iron, you need to (1) convert grams Al to moles Al (via molar mass), then (2) convert moles Al to moles Fe (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles Fe to grams Fe (via molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 3 sig figs because the given value (2.14) has 3 sig figs.
Molar Mass (Al): 26.982 g/mol
2 Al(s) + Fe₂O₃ ---> 2 Fe(s) + Al₂O₃(s)
Molar Mass (Fe): 55.845 g/mol
2.14 g Al 1 mole 2 moles Fe 55.845 g
---------------- x ----------------- x -------------------- x ------------------ = 4.43 g Fe
26.982 g 2 moles Al 1 mole
methanol:
1 mole CH3 OH --> produces --> 1 mole CO2
1 mole CO2 has a molar mass of 44.01 gh/mole
your set up is:
(44.01 g CO2) / -726.5kJ = 0.06058g
your answer 0.06058 grams of CO2 produced per kJ released.
