Answer:
n=0.852 moles
Explanation:
Given mass is, m = 19.6 g
The molar mass of sodium is, M = 22.99 u
We need to find the no of moles in 19.6 of Sodium. We know that, no of moles is equal to given mass divided by molar mass.

So, there are 0.852 moles in 19.6 g of Sodium.
Answer:
166 torr
Explanation:
Let’s call ethane Component 1 and propane Component 2.
According to Raoult’s Law,

where
p₁ and p₂ are the vapour pressures of the components above the solution
χ₁ and χ₂ are the mole fractions of the components
p₁° and p₂° are the vapour pressures of the pure components.
Data:
p₁° = 304 torr
p₂° = 27 torr
n₁ = n₂
1. Calculate the mole fraction of each component
χ₁ = n₁/(n₁ + n₂)
χ₁ = n₁/n₁ + n₁)
χ₁ = n₁/(2n₁)
χ₁ = ½
χ₁ = 0.0.5
χ₂ = 1- χ₁ = 1- 0.5 = 0.5
2. Calculate the vapour pressure of the mixture


From the atomic clock that utilizes C-133 which has an approximate frequency of 9.193 x 109 Hz. The wavelength of the energy is calculated to be 0.0326m.
From the given information:
- The frequency f = 9.193 × 10⁹ Hz = 9.193 × 10⁹ 1/s
- The wave speed c = 3.00 × 10⁸ m/s
Recall that:
The wavelength is the spatial successive distance between two crests of a wave and can be expressed by the formula:



Therefore, we can conclude that the wavelength of the atomic clock is 0.0326m. As such Option D is correct.
Learn more about wavelength here:
brainly.com/question/7143261?referrer=searchResults
Answer:
Baking Soda is NaHCO3 ---Sodium hydrogen Carbonate
Excessive use of Fertilizer can cause plants to develop shallow root systems,Decrease soil fertility and reduce Quality of Crops.