The act of using senses or tools to gather information is making an observation
Answer:
Both fission and fusion are nuclear reactions that produce energy, but the applications are not the same. Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy.
Explanation:
Answer: We need true value to find out who is more accurate.
Explanation:
Precision refers to the closeness of two or more measurements to each other.
Accuracy refers to the closeness of a measured value to a standard or known value.
For Example: If you weigh a given substance five times and you get 3.0 kg each time. Then the measurement is very precise.
For Example: If the mass of a substance is 3.0 kg and one person weighed 3.05 kg and another person weighed 3.2 kg. Then, the weight measured by first person is more accurate.
According to the question:
Density measured by Mary = 2.226 g
/ml
Density measured by Joseph= 2.335 g
/ml
As, the standard or known value is not given, we can not know which student’s value is more accurate
Answer:
H₂: 0.48, N₂: 0.43; Ar: 0.09
Explanation:
First of all, sum all the pressures to know the total pressure in the mixture.
434 Torr + 389.9 Torr + 77.9 Torr = 901.8 Torr
Mole fraction = Pressure gas / Total Pressure
Mole Fraction H₂: 434 Torr /901.8 Torr = 0.48
Mole Fraction N₂: 389.9 /901.8 Torr =0.43
Mole Fraction Ar: 77.9 /901.8 Torr = 0.09
Remember: <u>SUM OF MOLE FRACTION = 1</u>