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Brilliant_brown [7]
2 years ago
14

The electromagnetic spectrum includes the complete range of electromagnetic waves placed in order of...

Chemistry
1 answer:
Aleksandr-060686 [28]2 years ago
8 0

Answer: increasing frequency or energy and decreasing wavelength.

Explanation:

Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light i.e  

The electromagnetic spectra consist of radio waves, microwaves, infrared ,Visible , ultraviolet, X rays and gamma rays arranged in order of increasing frequency or increasing energy and decreasing wavelengths.

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Which of the following is an appropriate response to carbon monoxide (CO) poisoning?A) hyperventilation to exhale CO from the bo
natka813 [3]

Answer:

B) hyperbaric oxygen chamber to increase PO2 and clear CO from the body

Explanation:

Carbon monoxide poisoning occurs from the breathing in of poisonous gas, carbon monoxide (CO) at high levels. Large exposures of the gas can result in the loss of consciousness, seizures, or even death.

<u>Hyperbaric oxygen is used in treatment of carbon monoxide poisoning, as it hasten the dissociation of CO from carboxyhemoglobin and also cytochrome oxidase to a greater extent as compared to normal oxygen.  It also enhance the oxygen transport to tissues by the plasma.</u>

6 0
3 years ago
A pair of students found the temperature of 100. g of water to be 26.5°C. They then dissolved 8.89 g of AgNO3 in the water. When
bekas [8.4K]

Explanation:

Initial temperature of the water = T_i=26.5^oC

Final temperature of the water = T_f=23.7^oC

a) Change in temperature of the water,ΔT = T_f-T_i

\Delta T=23.7^oC-26.5^oC=-2.8^oC

Change in temperature of the water,ΔT is -2.8°°C.

b) Endothermic reaction : Reaction in which heat absorbed and the temperature if the surrounding is decreased.

Exothermic reaction : Reaction in which heat released and the temperature if the surrounding is increased.

On dissolving silver nitrate in water the temperature of the water decreased 2.8 degree Celsius  which means that energy water was absorbed by solid silver nitrate to get dissolve in water. Hence, endothermic reaction.

(f)  Mass of silver nitrate = 8.89 g

Moles of silver nitrate = \frac{8.89 g}{170 g/mol}=0.05229 mol

AgNO_3(aq)\rightarrow Ag^+(aq)+NO_3^-(aq)

1 mole of silver nitrate gives 1 mole of silver ion i.e. cation.

Then 0.05229 moles of silver nitrate will give:

\frac{1}{1}\times 0.05229 mol=0.05229 mol silver ions.

0.05229  moles of cations are produced.

1 mole of silver nitrate gives 1 mole of nitrate ion i.e. anion .

Then 0.05229 moles of silver nitrate will give:

\frac{1}{1}\times 0.05229 mol=0.05229 mol nitrate ions.

0.05229  moles of anion are produced.

5 0
2 years ago
Oxygen is composed of three isotopes: oxygen-16, oxygen-17 and oxygen-18 and has an average atomic mass of 15.9982 amu. Oxygen-1
Irina-Kira [14]

Answer:

The percent abundance of oxygen-18 is 1.9066%.

Explanation:

The average atomic mass of oxygen is given by:

m_{O} = m_{^{16}O}*\%_{16} + m_{^{17}O}*\%_{17} + m_{^{18}O}*\%_{18}

Where:

m: is the atomic mass

%: is the percent abundance

Since the sum of the percent abundance of oxygen isotopes must be equal to 1, we have:  

1 = \%_{16} + \%_{17} + \%_{18}

1 = x + 3.2 \cdot 10^{-4} + \%_{18}

\%_{18} = 1 - x - 3.2 \cdot 10^{-4}

Hence, the percent abundance of O-18 is:  

m_{O} = m_{^{16}O}*\%_{16} + m_{^{17}O}*\%_{17} + m_{^{18}O}*\%_{18}  

15.9982 = 15.972*x + 16.988*3.2 \cdot 10^{-4} + 17.970*(1 - 3.2 \cdot 10^{-4} - x)

x = 0.980614 \times 100 = 98.0614 \%                                                              

Hence, the percent abundance of oxygen-18 is:

\%_{18} = (1 - 3.2 \cdot 10^{-4} - 0.980614) \times 100 = 1.9066 \%                      

Therefore, the percent abundance of oxygen-18 is 1.9066%.

I hope it helps you!                                                      

8 0
2 years ago
What is the mass of a sample containing 1.94 moles of Ca? ______g
Andrej [43]

Answer:

77.8 grams of Ca

Explanation:

5 0
2 years ago
Read 2 more answers
For some hypothetical metal the equilibrium number of vacancies at 750°C is 2.8 × 1024 m−3. If the density and atomic weight of
mash [69]

Answer:

The correct answer is 5.447 × 10⁻⁵ vacancies per atom.

Explanation:

Based on the given question, the at 750 degree C the number of vacancies or Nv is 2.8 × 10²⁴ m⁻³. The density of the metal is 5.60 g/cm³ or 5.60 × 10⁶ g/m³. The atomic weight of the metal given is 65.6 gram per mole. In order to determine the fraction of vacancies, the formula to be used is,  

Fv = Nv/N------ (i)  

Here Nv is the number of vacancies and N is the number of atomic sites per unit volume. To find N, the formula to be used is,  

N = NA×P/A, here NA is the Avogadro's number, which is equivalent to 6.022 × 10²³ atoms per mol, P is the density and A is the atomic weight. Now putting the values we get,  

N = 6.022 × 10²³ atoms/mol × 5.60 × 10⁶ g/m³ / 65.6 g/mol

N = 5.14073 × 10²⁸ atoms/m³

Now putting the values of Nv and N in the equation (i) we get,  

Fv = 2.8 × 10²⁴ m⁻³ / 5.14073 × 10²⁸ atoms/m^3

Fv = 5.44669 × 10⁻⁵ vacancies per atom or 5.447 × 10⁻⁵ vacancies/atom.  

4 0
3 years ago
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