Hello!
The reaction that took place was
B) exothermic. The equation for the ΔH is
To know if this reaction is
exothermic or
endothermic we will need to look at the
sign of the
ΔH. If it is
positive, it means that enthalpy of the products is
higher than the enthalpy of the reagents and the reaction is
endothermic.
If the sign is negative, it means that the enthalpy of the products is
lower than the enthalpy of the reagents and the reaction is
exothermic. In this case, the sign is negative, so the reaction is exothermic.
Have a nice day!
Yes a transfomer can convert mechanical energy to electric energy
Answer:
Are you in flvs, if so im prettyb sure if yo look on page 3 of lesson 1.04 it tells you the answer.
Explanation:
HNO3 molar mass = 1 + 14 +3*16 = 63 g/mol
# of moles = mass / molar mass - 25.0 g / 63 g = 0.3968 moles
# of atoms = # of moles * Avogadro number = 0.3968 mol * 6.022 *10^23 atoms/mol = 2.39 * 10^23 atoms