Answer:
C. liquid to a gas
Explanation:
I know this is right but I don't have an explanation
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Answer:
2 × 10³ g
Explanation:
Let's consider the complete combustion of octane.
C₈H₁₈(l) + 12.5 O₂(g) ⇄ 8 CO₂(g) + 9 H₂O(l)
We can establish the following relations:
- 1 L = 10³ mL.
- 1 mL of octane has a mass of 0.703 g (ρ = 0.703 g/mL).
- The molar mass of octane is 114.23 g/mol.
- The molar ratio of C₈H₁₈ to CO₂ is 1:8.
- The molar mass of CO₂ is 44.01 g/mol.
The mass of CO₂ produced from the complete combustion of 1 L of octane is:
To prepare a 2 mol·L⁻¹ solution of KNO₃, you must measure the mass of the A. solute and the volume of the B. solution.
The formula for molar concentration (<em>c</em>) is
<em>c</em> = moles of solute/litres of solution
∴ You measure out a mass of KNO₃ equivalent to two moles (202.20 g), and then you add enough water to make the volume of solution up to 1 L.
The answer is going to be 140 cm because if you do 1.4 times 100 the answer is going to be 140. It will always work!!!