Atomic mass Boron ( B ) = 10.811 u.m.a
10.811 g -------------- 6.02x10²³ atoms
5.40 g ----------------- ?? atoms
5.40 x ( 6.02x10²³) / 10.811 =
3.0069x10²³ atoms
Ecosystem = Costa Rica Rainforest
Population = All the Birds that live in Juan Castro Blanco National Park, Costa Rica
Species = Scarlet Macaws
Community = Scarlet Macaws that live in Juan Castro Blanco National Park, Costa Rica
Hope this helps!
Answer : To calculate the standard molar enthalpy of complete combustion of liquid ethanol can be done by using the formula given below;

Now, the enthalpies of the elements in their standard state is zero always.
So the

Here we can avoid the heat of enthalpy of oxygen,carbon dioxide and water as they exists in their standard states.
So the

=
Answer:
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