Answer:
D ≈ 4.86 g/mL
Explanation:
Density = Mass over Volume
D = m/V
Step 1: Define variables
m = 13.76 g
V = 2.83 mL
D = unknown
Step 2: Substitute and Evaluate for Density
D = 13.76 g/2.83 mL
D = 4.8621908127208480565371024734982 g/mL
Step 3: Simplify
We are given 3 sig figs.
4.8621908127208480565371024734982 g/mL ≈ 4.86 g/mL
Answer:
A conclusion derived from evidence and logical reasoning
Explanation:
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Answer:
0.29
Explanation:
Step 1: Write the balanced equation at equilibrium
3 NO₂(g) + H₂O(l) ⇄ 2 HNO₃(aq) + NO(g)
Step 2: Calculate the molar concentration of the substances
We will not calculate the molarity of H₂O because pure liquids are not included in the equilibrium constant. We will use the following expression.
Molarity = mass of solute / molar mass of solute × liters of solution
Since the volume of the vessel is missing, we will assume it is 1 L to see the procedure.
[NO₂] = 22.5 / 46.01 g/mol × 1 L = 0.489 M
[HNO₃] = 15.5 g / 63.01 g/mol × 1 L = 0.246 M
[NO] = 16.6 g / 30.01 g/mol × 1 L = 0.553 M
Step 3: Calculate the value of the equilibrium constant Kc for this reaction
Kc = [HNO₃]² × [NO] / [NO₂]³
Kc = 0.246² × 0.553 / 0.489³
Kc = 0.29
So we have: 1 C2H5OH + _ O2 -> 2 CO2 + _ H2O Step 3: The only molecule on the right that is left is H2O. We start with 6 hydrogen atoms<span> on the left.</span>
