<span>One mole of any material contains 6.02 * 10e23 atoms or molecules. This is the Avogadro number.
So 9.25 * 10e24 atoms are contained in (9.25*10e24 / 6.02 * 10e23) = 15.36 moles. So the answer is that moles of C8H18 is 15.36 moles</span>
The heat capacity of iron is 0.45J/g°C.
We calculate the heat using the equation:
ΔH = m cp ΔT
where
<span>m is the mass
ΔH is enthalphy or the heat required
cp is the heat capacity
</span><span>ΔT is the change in temperature
</span>So,
<span>ΔH = m cp ΔT = (125g) (0.45 J/g</span>°C) (75°C - 23.5<span>°C)
</span><span>ΔH = 2896.875 J
</span>
Dividing by 1000 to convert to kJ,
<span>ΔH = 2.897 kJ</span>
One mole of any element has a mass in grams that is equal to its atomic number, and has exactly 6.02 x 1023 atoms however because the atoms of each element have different sizes and weights, then the volume that each one occupies is different.
Answer:
ok 3 = 9 15 i got 15 so what
Explanation:
