Explanation:
Step 1: Write the balanced "molecular" equation:
Step 2: H₂S is written in molecular form. Consult the solubility and net ionic equation rules on the information page to determine which of the other substances will dissociate:
yes no yes
Step 3: Dissociate all soluble salts, strong acids, and strong bases (except calcium hydroxide). Leave together all "not soluble" salts and weak acids or bases:
Step 4: Cross out "spectator ions" that appear on both sides of the reaction (these ions do not participate in the chemistry) and rewrite the "net" reaction using the smallest possible coefficients:
Answer:
2.07 Kcal heat must be added to completely melt the platinum.
Explanation:
Given data:
Molar heat of fusion = 4.700 Kcal / mol
Mass of platinum = 85.5 g
Heat of fusion = ?
Solution:
Formula:
ΔH = n × molar heat of fusion
n = number of moles
Now we will calculate the number of moles:
Number of moles = mass / molar mass
Number of moles = 85.5 g /195.08 g/mol
Number of moles = 0.44 mole
ΔH = n × molar heat of fusion
ΔH = 0.44 mol × 4.700 Kcal / mol
ΔH = 2.07 Kcal
Photosynthesis is how producers make their own food
Answer:
0.713atm for CO and 0.287atm for CO₂
Explanation:
Based on the reaction:
FeO(s) + CO(g) ⇋ Fe(s) + CO₂(g)
Kp is defined as:
= 0.403
When 1.00 atm of CO react with an excess of FeO, the pressures in equilibrium are:
PCO = 1.00atm - x
PCO₂ = x
<em>Where x represents the reaction coordinate.</em>
Replacing in Kp expression:
0.403 - 0.403x = x
0.403 = 1.403x
0.287atm = x
Thus, pressures in equilibrium are:
PCO = 1.00atm - x = <em>0.713atm</em>
PCO₂ = x = <em>0.287atm</em>
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