A) Translational motion or the first option would be your answer.
Answer:
1M
Explanation:
Given parameters:
Volume of Ca(OH)₂ = 25mL = 0.025dm³
Concentration = 1.1M
Volume of HNO₃ = 55mL = 0.055dm³
Unknown:
Concentration of HNO₃ = ?
Solution:
To solve this problem, we must bear in mind that this an acid-base titration. In this reaction, an acid is used to neutralize a base.
The reaction equation is shown below;
Ca(OH)₂ + 2HNO₃ → Ca(NO₃)₂ + 2H₂O
Start from the given and known reactant first. Here it is Ca(OH)₂ ;
Find the number of moles of Ca(OH)₂ first.
Number of moles Ca(OH)₂ = concentration x volume
= 1.1 x 25 x 10⁻³
= 0.028moles
From the reaction equation;
1 mole of Ca(OH)₂ reacted with 2 moles of HNO₃
0.028 moles of Ca(OH)₂ will react with 2 x 0.028
= 0.055moles of HNO₃
Now that we know the number of moles, we can find the concentration of HNO₃;
Concentration of HNO₃ = ![\frac{number of moles }{volume}](https://tex.z-dn.net/?f=%5Cfrac%7Bnumber%20of%20moles%20%7D%7Bvolume%7D)
= ![\frac{0.055}{0.055}](https://tex.z-dn.net/?f=%5Cfrac%7B0.055%7D%7B0.055%7D)
= 1M
Answer:
9.73154 × 10⁻⁶ m, infrared region
Explanation:
Using Wien's displacement law which states that the temperature and the wavelength of the blackbody radiation are inversely proportional.
So,
λmax= b/T
Where,
λmax is the peak of wavelength
b is the Wien's displacement constant having value as ![2.9\times 10^{-3}\ m K](https://tex.z-dn.net/?f=2.9%5Ctimes%2010%5E%7B-3%7D%5C%20%20m%20K)
T is the Absolute Temperature in Kelvins . Room temperature = 298 K
So,
λmax= b/T =
= 9.73154 × 10⁻⁶ m
This wavelength corresponds to infrared region.
Density is mass/ volume so 1300/743x10^3=.00174966