Answer:
71.92 kPa
Explanation:
Using the combined gas law equation;
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (kPa)
P2 = final pressure (kPa)
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the information provided in this question;
T1 = 50°C = 50 + 273 = 323K
V1 = 105L
T2 = -25°C = -25 + 273 = 248K
P2 = 105.4 kPa
P1 = ?
V2 = 55.0 L
Using P1V1/T1 = P2V2/T2
P1 × 105/323 = 105.4 × 55/248
105P1/323 = 5797/248
0.325P1 = 23.375
P1 = 23.375 ÷ 0.325
P1 = 71.92 kPa
It would be D because the atoms both share electrons and they're both gaining from each other.
D is the answer blah blah blah
Answer:
1. chemical property
2. chemical property
3. chemical change
4. physical change
5. physical property
6. chemical change
7. chemical change
8. chemical property
9. physical property
10. physical property
11. physical change
12. chemical change
13. chemical change
14. chemical change
15. true
16. true
17. false
18. true
19. false
20. true
21. chemical change
22. physical change
23. chemical change
24. chemical change
Explanation:
Like it says in the worksheet, for questions 1-14, you can tell the difference between a property and change by whether there is a verb in the description.
If the object is simply changing form (melting, freezing), it is a physical change or property. The object can be returned to the state it was in originally without much difficulty. You can freeze water and turn it into ice. You can just as easily melt the ice and turn it into water again.
If the object is actually changing its composition or a reaction is taking place (baking bread, combustion), it is a chemical change or property. It is not as easy and sometimes even impossible to change back to its original state. If you have a bike that is rusted, you cannot really do much to change it back to how it was before it got rusty.
Hope this helps! <3
