Answer : The heat released by the combustion of 1.121 mol of hexane (kJ) is,
Explanation :
The given balanced reaction is,
Given:
Moles of hexane = 0.121 mol
= -8326 kJ/mol
The negative sign indicate that the reaction exothermic or amount of heat released.
As, 1 mole of hexane released heat = 8326 kJ
So, 0.121 mole of hexane released heat = 8326 × 0.121 = 1007.446 ≈
Therefore, the heat released by the combustion of 1.121 mol of hexane is .
Answer:
Susan is right
Explanation:
Honey is a natural substance extracted from bees. Like every other natural substance, honey is a mixture of many different substances. An analysis of the so called 'pure honey' will reveal that many chemical species compose the natural substance called honey.
Hence Susan is right when she says that honey is not really pure but a mixture of substances.
Answer:
H₂O = 3.56 moles
MgCl₂ = 1.78 moles
Explanation:
Given data:
Moles of HCl = 3.56 mol
Moles of water produced = ?
Moles of MgCl₂ produced = ?
Solution:
Chemical equation:
2HCl + Mg(OH)₂ → MgCl₂ + 2H₂O
Now we will compare the moles of HCl with water and magnesium chloride.
HCl : MgCl₂
2 : 1
3.56 : 1/2×3.56 = 1.78 mol
HCl : H₂O
2 : 2
3.56 : 3.56 mol
<span>For addition and subtraction you round to decimal places.
Round the number so that it has the same number of decimal places as the number in your data that has the least number of decimal places.
9 cm + 2.8 cm = 11.8 cm
the 9 has no decimal places so
= 12 cm
(this is rounded to 0 decimal places.)
(It has 2 sig figs) </span>
The answer is A. I know because I know.