Answer:
The volume of hydrogen gas produced at STP is 4.90 liters.
Explanation:
![2Al (s) + 6 HCl (aq)\rightarrow 2 AlCl_3 (aq) + 3 H_2 (g)](https://tex.z-dn.net/?f=2Al%20%28s%29%20%2B%206%20HCl%20%28aq%29%5Crightarrow%202%20AlCl_3%20%28aq%29%20%2B%203%20H_2%20%28g%29)
Moles of aluminium =![\frac{3.60 g}{27 g/mol}=0.1333 mol](https://tex.z-dn.net/?f=%5Cfrac%7B3.60%20g%7D%7B27%20g%2Fmol%7D%3D0.1333%20mol)
According to reaction , 2 moles of aluminium gives 3 moles of hydrogen gas.
Then 0.1333 moles of aluminium will give:
of hydrogen gas
Volume of 0.2 moles of hydrogen gas at STP = V
Temperature at STP = T = 298.15 K
Pressure at STP = P = 1 atm
n = 0.2 mol
PV = nRT (Ideal gas equation)
![V=\frac{nRT}{P}=\frac{0.2mol\times 0.0821 atm L/mol K\times 298.15 K}{1 atm}=4.8956 L\approx 4.90 L](https://tex.z-dn.net/?f=V%3D%5Cfrac%7BnRT%7D%7BP%7D%3D%5Cfrac%7B0.2mol%5Ctimes%200.0821%20atm%20L%2Fmol%20K%5Ctimes%20298.15%20K%7D%7B1%20atm%7D%3D4.8956%20L%5Capprox%204.90%20L)
The volume of hydrogen gas produced at STP is 4.90 liters.
Answer:
2800 torr
Explanation:
- Use Boyle's law
- Rearrange formula to fit problem
- Hope this helped! Please let me know if you would like steps or want to learn how to do this.
i think its theory but im not to sure
Answer:
Accuracy of values
Explanation:
They're correct due to margin error of ±0.5 during an experiment.
1 min 15 seconds is equivalent to 75 seconds.
However the other one was 75.5 seconds.
Using the margin error of ±0.5 during recording, they're both correct.
Note : Accuracy is the closeness of agreement between a measured value and a true or accepted value. Measurement error is the amount of inaccuracy.
Precision is a measure of how well a result can be determined (without reference to a theoretical or true value). It is the degree of consistency and agreement among independent measurements of the same quantity; also the reliability or reproducibility of the result.
The uncertainty estimate associated with a measurement should account for both the accuracy and precision of the measurement.
In this case, this is an argument of who was more accurate and judging by this standard, they're both accurate but not necessarily precise since their values are not exact with each other.