The shape of the molecule is trigonal planar.
For example, H₂O:
..
O
/ \
H H
Answer:
Hello
The answer is 25gr H2O
Explanation:
50grH2×1 molH2/2 gr H2×2mol H2O/2molH2=25gr H2O
Answer:
you gotta rotate it 90 degrees and get that screen fixed
Explanation:
Answer: 90.04°C
Explanation: <u>Calorimeter</u> is a device measures the amount of heat of a chemical or physical process. An ideal calorimeter is one that is well-insulated, i.e., prevent the transfer of heat between the calorimeter and its surroundings. So, the net heat change inside the calorimeter is zero:
![q_{1}+q_{2}=0](https://tex.z-dn.net/?f=q_%7B1%7D%2Bq_%7B2%7D%3D0)
Rearraging, it can be written as
![q_{1}=-q_{2}](https://tex.z-dn.net/?f=q_%7B1%7D%3D-q_%7B2%7D)
showing that the heat gained by Substance 1 is equal to the energy lost by Substance 2.
In our case, water is gaining heat, because its temperature has risen and so, brass is losing energy:
![q_{water}=-q_{brass}](https://tex.z-dn.net/?f=q_%7Bwater%7D%3D-q_%7Bbrass%7D)
Calculating:
![m_{w}.c_{w}.\Delta T=-[m_{b}.c_{b}.\Delta T]](https://tex.z-dn.net/?f=m_%7Bw%7D.c_%7Bw%7D.%5CDelta%20T%3D-%5Bm_%7Bb%7D.c_%7Bb%7D.%5CDelta%20T%5D)
![100.4.18.(18.4-15)=-[52.9.0.375.(18.4-T)]](https://tex.z-dn.net/?f=100.4.18.%2818.4-15%29%3D-%5B52.9.0.375.%2818.4-T%29%5D)
Note: final temperature is the same as the substances are in thermal equilibrium.
Solving:
418(3.4)= - 365.01 + 19.8375T
19.8375T = 1786.21
T = 90.04
The initial temperature for the sample of brass was 90.04°.
Answer:
Statment 2
Explanation:
This is just an educated guess