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Sauron [17]
3 years ago
9

The H atom and the Be3³⁺ ion each have one electron. Does the Bohr model predict their spectra accurately? Would you expect thei

r line spectra to be identical? Explain.
Chemistry
1 answer:
lbvjy [14]3 years ago
4 0

Explanation:

a) Bohr model is perfect for atoms that have single electron and fortunately both Be3+ ion and H atom have one electron so, Bohr model can easily and accurately applied to predict the spectrum of Be3+ and H atom.

b) The energy of an atom in  Bohr model is given by

E= \frac{-13.6z^2}{n^2}

the values of z for H atom and Be3+ ion are 1 and 4 respectively. Hence, energy of atoms would be different for both atoms. Hence, line spectra to be identical is not possible.

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Which of the following describes an impact of the specific heat of water on the planet? Islands and coastal places have moderate
den301095 [7]

Answer:

Islands and coastal places have moderate pleasant climates.

Explanation:

The specific heat of water is very large as compared to most of the common substances. The result of this characteristic is that water heats slowly and cools slowly. In coastal region and islands, the air above lands gets heated up quickly as compared to air above water. The hot air is lighter and rises. The cool air above water rushes to takes its place. This is known as sea breeze. At night, the wind blows from land towards the sea as land cools down faster than water. land breeze occurs at night. Due to sea breeze and land breeze, moderate pleasant climates characterizes the islands and coastal regions.

3 0
3 years ago
Read 2 more answers
What is the mass present in a 10.0L container of oxygen at a pressure of 105kPa and 20 degrees Celsius
omeli [17]

1.31 × 10⁴ grams.

<h3>Explanation</h3>

Assume that oxygen acts like an ideal gas. In other words, assume that the oxygen here satisfies the ideal gas law:

P \cdot V = n \cdot R\cdot T,

where

  • P the pressure on the gas, \bf P = 10^{5}\;\textbf{kPa}=10^{8}\;\textbf{Pa};
  • V the volume of the gas, V = 10.0 \;\text{L} = 10.0\times 10^{-3}\;\text{m}^{3}=10^{-2}\;\text{m}^{3};
  • n the number of moles of the gas, which needs to be found;
  • T the absolute temperature of the gas, T=20\;\textdegree{}\text{C} = (20 + 273.15)\;\text{K} = 293.15\;\text{K}.
  • R the ideal gas constant, R = 8.314 if P, V, and T are in their corresponding SI units: Pa, m³, and K.

Apply the ideal gas law to find n:

n = \dfrac{P\cdot V}{R\cdot T} = \dfrac{{\bf 10^{8}\;\textbf{Pa}}\times 10^{-2}\;\text{m}^{3}}{8.314 \;\text{Pa}\cdot\text{m}^{3}\cdot\text{K}^{-1}\cdot\text{mol}^{-1}\times 293.15\;\text{K}} = 410.3\;\text{mol}.

In other words, there are 410.3 moles of O₂ molecules in that container.

There are two oxygen atoms in each O₂ molecules. The mass of mole of O₂ molecules will be {\bf 2}\times 16.00 = 32.00\;\text{g}. The mass of 410.3 moles of O₂ will be:

410.3 \times 32.00 = 1.31\times10^{4}\;\text{g}.

What would be the mass of oxygen in the container if the pressure is approximately the same as STP at 10^{5}\;\textbf{Pa} or  10^{2}\;\text{kPa} instead?

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IRINA_888 [86]

Answer:

Explanation:

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2 ) Potassium cyanide is  salt of potassium hydroxide and hydrogen cyanide . The former is strong base and the later is weak acid so its salt will be basic in nature .

3 ) sodium chloride is a salt of sodium hydroxide and hydrogen chloride . The former is strong base and later is strong acid. So the salt is neutral .

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