Answer:
CH₄ + 2O₂ ⟶ CO₂ + 2H₂O + 212 800 cal
Step-by-step explanation:
CH₄ + 2O₂ ⟶ CO₂ + 2H₂O + 212 800 cal
The heat is on the right-hand side of the equation, so the reaction is releasing heat.
The reaction is <em>exothermic</em>.
A is <em>wrong</em>. Your sign of ΔH is wrong, because graphite is the more stable form of carbon. We must add energy to graphite to convert it to diamond, so the process is<em> endothermic</em>.
B and D are <em>wrong</em>, because a ΔH > 0 indicates an <em>endothermic</em> reaction.
Answer:While in Europe, if you drive 119 km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage ...
Hey there!:
Density is the relationship between the mass and the volume of a material, at a given pressure and temperature.
Volume Displacement is now calculated :
Final volume - initicial volume
31.44 mL - 22.69 mL => 8.75 mL
Therefore:
D = m(g) / v (mL )
D = 23.625 / 8.75
D = 2.7 g/mL
Hope that helps!
Answer:
may or may not be equal to the number of moles of the products.
Explanation:
A chemical reaction involves the interaction between reactants to yield products. The number of moles of reactants and products in the system depends on the stoichiometry of the reaction.
The balanced reaction equation shows us the number of moles of reactants and products involved in the reaction.
Hence, in the balanced chemical reaction equation; the number of moles of reactants may or may not be equal to the number of moles of the products.
PV = nRT
Pressure times volume = number of moles times ideal gas constant times temperature
50mL = .05L
1 atm (.05) = n (.0821) (273)
.05 = n (22.4133)
.022 = n (number of moles)
6.022E23 molecules = 1 mole
.022 x 6.022E23 = 1.325E23 molecules