I know for number 4 the answer is c, sorry I can't help with the others.
Answer:
83ºC
Explanation:
A bomb calorimeter is an instrument used to measure the heat that release or absorb a particular reaction.
The reaction of combustion of propane is:
C₃H₈ + 5O₂ → 3 CO₂ + 4 H₂O ΔH = -2222kJ/mol
<em>1 mole of propane release 2222kJ</em>
10.0g of propane (Molar mass: 44.1g/mol).
10.0g ₓ (1mol/ 44.1g) = <em>0.227 moles of C₃H₈</em>
If 1 mole of propane release 2222kJ, 0.227moles will release (Release because molar heat is < 0):
0.227 moles of C₃H₈ ₓ (2222kJ / mol) = 504kJ.
Our calorimeter has a constant of 8.0kJ/ºC, that means if there are released 8.0kJ, the bomb calorimeter will increase its temperature in 1ºC. As there are released 504kJ:
504kJ ₓ (1ºC / 8.0kJ) = 63ºC will increase the temperature in the bomb calorimeter.
As initial temperature was 20ºC, final temperature will be:
<h2>83ºC</h2>
Answer:
The volumes of 1 mol of CO, and 1 mol of N, gases are the same.
Explanation:
Equal volumes of gases have the same number of moles.
Answer:
postpurchase dissonance
Explanation:
The feeling of the buyer after the acquisition of the product can influence the repetition of sales and what he tells others about the product purchased.
A phenomenon that usually occurs after the purchase of the product or service is that of: cognitive dissonance.
Each of the alternatives that the consumer has considered has advantages and limitations, that is, when the purchase decision is finally made, the selected product has certain drawbacks while each of the rejected alternatives has some attractive characteristics.
The negative aspects of the article that is selected together with the positive qualities of the products that are rejected create cognitive dissonance in the consumer.
This cognitive dissonance may vary due to the behavior of the following variables:
- The nominal and real value (money) of the purchase
.
- Rejection of similarity of selected and rejected articles.
- The relative importance of the decision.
Answer:
Phosphorus generally forms compounds with oxygen, hydrogen, and halides
Explanation:
:)
