Answer:
NaOH + H2SO4 ‐‐> 2H2O + Na2SO4;
The given statement about standard heat of formation is true.
Explanation:
Yes, it is true that standard heat of formation is same as standard enthalpy of formation. As enthalpy is termed for change in the heat energy occurred in the process of completion of any chemical reaction, the standard enthalpy or heat of formation is termed as the heat energy required to form 1 mole of any substance in its standard state from its original, parent or constituent elements in their standard state. Basically, it defines the amount of energy required by the system or compound for its formation from different elements under different synthesis conditions but the nature of the parent samples and temperature and pressure should be kept standard.
So the given statement is true.
Answer: The continental crust is the layer of granitic, metamorphic and sedimentary rock that form the continents.
Explanation:
Answer:
the theoretical value for the number of moles of is 0.0173 moles
Explanation:
The balanced chemical equation for the reaction is represented by:
From above equation; we would realize that 3 moles of reacts with to produce 3 moles of
However ; the molar mass of = 84 g/mol
mass given for = 1.45 g
therefore , we can calculate the number of moles of by using the expression :
number of moles of =
number of moles of =
number of moles of = 0.0173 mole
Since the ratio of to is 1:1; that implies that number of moles of is equal to number of moles of produced.
number of moles of =
0.0173 =
mass of = 0.0173 × 44
mass of = 0.7612 g
Thus; the theoretical value for the number of moles of is 0.0173 moles
Pb(OH)2 + 2 HCl = 2 H2O + PbCl2