Fine-grainted igneous rocks form?
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Answer : 42 grams of oxygen are required.
Explanation :
Step 1 : Write balanced chemical equation.
The combustion reaction of octane with oxygen can be written as,
Step 2 : Find moles of octane.
The given mass of octane is 12 g
Molar mass of octane is 114.2 g/mol
The moles of octane are calculated as,
We have 0.105 mol octane.
Step 3: Use mole ratio from balanced equation to find moles of O₂
The mole ratio of octane and O₂ is 2 : 25. Let us use this as a conversion factor.
We have 1.31 mol O₂.
Step 4 : Convert moles of O₂ to grams.
The molar mass of O₂ is 32 g/mol.
The grams of O₂ can be calculated as,
42 grams of oxygen are required.
A calorimeter is just an insulated container which contains the sample. You combust the sample inside the calorimeter, then you measure the temperature with respect to time. Make sure to stir constantly. Thus, you need a thermometer and a stirrer. The coffee cup calorimeter is labelled as shown in the picture attached. The goal of this experiment is to determine the specific heat capacity.
