Answer:
1)they form crystals
2)they're hard and brittle
3)they've high melting and boiling points
4)they're good insulators
1) first, we need to write down the reaction equation for this combustion.
2C₈H₁₈ + 25O₂ ----> 16CO₂ + 18H₂O
2) we have the volume of gasoline, we can use the density to convert to grams
3.8 L = 3800 mL
3800 mL (0.79 g/ 1 mL)= 3002 grams
3) let's convert the grams to moles using the molar mass of gasoline
molar mass C₈H₁₈= (8 x 12.0) + (18 x 1.01)= 114.18 g/mol
3002 g (1 mol/ 114.18 grams) = 26.3 moles
4) let's use the balanced equation to convert moles of C₈H₁₈ to moles of water.
26.3 moles C₈H₁₈ (18 mol H₂O/ 2 moles C₈H₁₈)= 237 moles H₂O
5) finally, let's convert the moles to grams using the molar mass of water and then to Kg
molar mass of H₂O (2 x 1.01) + 16.0= 18.02 g/mol
237 mol H₂O (18.02 g/ 1 mol)= 4260 grams
4260 grams= 4.26 Kilograms
Answer:
C. One mole of water was produced from this reaction.
Explanation:
- From the balanced equation:
<em>2H₂ + O₂ → 2H₂O,</em>
It is clear that 2 mol of H₂ react with 1 mol of O₂ to produce 2 mol of H₂O.
- So, if one mole of hydrogen was used in this reaction:
1/2 mol of O₂ was used in the reaction, and
1 mol of water was produced from this reaction.
- So, the correct statement is:
<em>C. One mole of water was produced from this reaction.
</em>
Answer:
7.1 moles Cl₂
Explanation:
To solve this problem we will use <em>Avogadro's number </em>(Aₙ), which tells us how many molecules (or atoms) are present in 1 mol of any given substance
Aₙ = 6.023 x 10²³ molecules/mol
With that in mind now we proceed to convert molecules into moles:
4.28 x 10²⁴ molecules Cl₂ ÷ 6.023 x 10²³ molecules/mol = 7.1 moles Cl₂
Answer:
There are 18 carbon atoms in a molecule of omega 3 fatty acid
Explanation:
