Something that can be separated by physical means implies that there is a noticeable difference between the two components when mixed together. For example, salt water has a noticeable difference in that the boiling points of water and salt are so different that the water can be separated by evaporation. The only thing that can be separated by physical means is a mixture.
We no longer use atoms of the same elements are identical in size, mass and properties.
Answer:
3
Explanation:
You have to mutiply the silver reaction by 3 in order to substract the electrons
Explanation:
Let the mass of the compound be 100g.
Mass of Sulfur = 96g.
=> Moles of Sulfur
= 96g / (32.07g/mol) ≈ 3
Mass of Hydrogen = 4g.
=> Moles of Hydrogen
= 4g / (1.008g/mol) ≈ 4
Mole ratio of Sulfur to Hydrogen = 3 : 4,
Empirical formula of compound = S3H4.
Answer:
A) 6.15×10^14 per sec
B)2.5 sec
Explanation:
Wavelength of light = 488 nm
speed of light = 3×10^8 m/s
therefore, frequency of light 
⇒ 
⇒ν= 6.15×10^14 per sec
b) distance between moon and earth = 3.8×10^5 km.
= 3.8×10^8 m
light travel from earth moon and back to earth
therefore, distance traveled= 2× 3.8×10^8 m = 7.6×10^8 m
therefore time= distance/speed
⇒ time= 
= 2.5 sec
So, for a round trip time required is 2.5 sec.
