Answer:
Only the radiation with a wavelength 0.91 nm can be observed by an X-ray detector.
Explanation:
To answer this question we need to consult the ranges in which x rays are in the electromagnetic spectrum:
The X radiation in the electromagnetic spectrum fall in the region of:
frequency: 3 x 10¹⁶ Hz to 3 x 10¹⁹ Hz (1Hz = 1s⁻¹)
wavelengt: 1 pm to 10 nm
Comparing the values in our question,
0.91 nm will be detected
5.9 x 10¹¹ Hz will not be detected.
Answer:
atomic mass of X is 48.0 amu
Explanation:
Let y be the atomic mass of X
Molar mass of O_2 is = 2×16 = 32 g / mol
X + O2 -----> XO_2
According to the equation ,
y g of X reacts with 32 g of O_2
24 g of X reacts with Z g of O_2
Z = ( 32×24) / y
But given that 24.0 g of X exactly reacts with 16.0 g of O_2
So Z = 16.0
⇒ (32×24) / y = 16.0
⇒ y = (32×24) / 16
y= 48.0
So atomic mass of X is 48.0 amu
Answer:
copper wire, metal nail, battery
Explanation:
To create an electromagnet, the material to be magnetized (such as a metal nail) is placed inside a solenoid, the ends of the coils are connected to a circuit that includes a battery.
Current is allowed to flow for a few seconds and then cut off. The polarity of the magnet depends on the direction of flow of current in the solenoid.
Answer:
minimum number of trays:
N = 7 trays
Explanation:
minimum number (N):
- N = ( Log ( (Xd / ( 1 - Xd )) * (( 1 - Xb ) / Xb )) ) / Log α....Fenske's Eq. binary mixture
∴ α = 2.5
∴ Xd = 0.96.......molar fraction the distillate
∴ Xb = 0.04 .........molar fraction in the bottoms
⇒ N = ( Log ( ( 0.96 / ( 1 - 0.96 ) ) * ( ( 1 - 0.04 ) / 0.04 )) ) / Log ( 2.5 )
⇒ N = 6.94 ≅ 7 trays
The answer is C. sugar water. Sugar can dissolve in water completely and form the solution. While other three are all heterogeneous mixture.
