Ok buddy sorry buddy I just got
Critical Thinking Questions
1. Why do you think forensic scientists are so careful that the tests they do are sensitive, reproducible, and specific? What might happen if they were less careful about this?
They have to be careful to ensure as much accuracy as possible.
2.Which type of evidence do you think is most useful in an investigation? Why?
Physical evidence would probably be most important because it is the best way to connect someone directly with that crime.
3.Why do you think that forensic scientists continue to look for class characteristics given their limitations?
Class characteristics are good in court because it provides details of different aspects of the crime.
Mass of medicinal agent taken = 1.2 g
the volume is 60 mL
Specific gravity = 1.20
So the mass of solution = specific gravity X volume = 1.20 * 60 = 72g
Now if we have increased the volume by 0.2 so the new volume = 60.2
New mass = 72 + 1.2 = 73.2
Specific gravity = mass / volume = 73.2 / 60.2 = 1.22 g/mL
5cm
Explanation:
you have to divide 100cm by 20 sec
Answer: 204 L
Explanation:
According to ideal gas equation:
![PV=nRT](https://tex.z-dn.net/?f=PV%3DnRT)
P = pressure of gas = 0.262 atm
V = Volume of gas = ?
n = number of moles = ![\frac{\text {given mass}}{\text {molar mass}}=\frac{11.7g}{4g/mol}=2.92](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%20%7Bgiven%20mass%7D%7D%7B%5Ctext%20%7Bmolar%20mass%7D%7D%3D%5Cfrac%7B11.7g%7D%7B4g%2Fmol%7D%3D2.92)
R = gas constant =![0.0821Latm/Kmol](https://tex.z-dn.net/?f=0.0821Latm%2FKmol)
T =temperature =![-50^0C=(273+(-50))K=223K](https://tex.z-dn.net/?f=-50%5E0C%3D%28273%2B%28-50%29%29K%3D223K)
![V=\frac{nRT}{P}](https://tex.z-dn.net/?f=V%3D%5Cfrac%7BnRT%7D%7BP%7D)
![V=\frac{2.92\times 0.0820 L atm/K mol\times 223K}{0.262atm}=204L](https://tex.z-dn.net/?f=V%3D%5Cfrac%7B2.92%5Ctimes%200.0820%20L%20atm%2FK%20mol%5Ctimes%20223K%7D%7B0.262atm%7D%3D204L)
Thus volume occupied by 11.7 g of Helium in a balloon is 204L