Answer:
When ray of light moves from air to water its speed changes and it bent away from surface.
Explanation:
When ray of light moves from less denser to more denser medium such from air to water its speed slow down and ray bent away from the surface (surface between air and water). The refraction is occur.
Refraction:
It is bending of light when it passes from one to another material.
It is measure as:
n = c / v
n = refractive index
c = speed of light in air
v = speed of light in medium
For example:
The refractive index of water is 1.33 it means light travel 1.33 times faster in vacuum as compared to water.
A ray of light passes from air to water and it bent away from the surface. The angle of refraction is less than the angle of incidence.
The bending also occur when light come from water and inter into air.
B.sunligh
is reflected off the upper atmosphere
The moles of hydrogen produced in the reaction has been 0.105 mol. Hence, option D is correct.
The balanced chemical equation for the decomposition of Ammonia has been:
<h3>Computation for moles of Hydrogen produced</h3>
From the balanced chemical equation, decomposition of 2 moles of ammonia produces, 3 moles of hydrogen and 1 mole, nitrogen.
The moles of hydrogen produced along with 0.0351 mol nitrogen has been:
Thus, the moles of hydrogen produced in the reaction has been 0.105 mol. Hence, option D is correct.
Learn more about balanced equation, here:
brainly.com/question/7181548
Answer:
Option D. 4.02 kJ
Explanation:
A simple calorimetry problem
Q = m . C . ΔT
ΔT = Final T° - Initial T°
C = Specific heat capacity
m = mass
Let's replace the data
Q = 125 g . 2.42 J/g∘C . (34.8°C -21.5 °C)
Q= 4023.25 J
We must convert the answer to kJ
4023.25 J . 1kJ /1000 =4.02kJ
Answer:
Option D (191 grams) is correct
Explanation:
Step 1: Data given
Atomic mass of Mg = 24.3 g/mol
Atomic mass of Cl = 35.45 g/mol
Atomic mass of O = 16.0 g/mol
Step 2: Calculate molar mass of Mg(ClO3)2
In 1 molecule Mg(ClO3)2 we have 1x Mg, 2x Cl and 6x O
Molar mass Mg(ClO3)2 = atomic mass of Mg + atomic mass of (2*Cl) + atomic mass of (6x O)
Molar mass Mg(ClO3)2 = 24.3 g/mol + 2*35.45 g/mol + 6* 16.0 g/mol
Molar mass Mg(ClO3)2 = 191.2 g/mol
The molar mass of Mg(ClO3)2 is 191 g/mol
This means 1 mol has a mass of 191 grams
Option D (191 grams) is correct