Which of the following electromagnetic waves are listed in the correct order from longest wavelength to shortest wavelength? A.
infrared, ultraviolet, visible
B.
visible, infrared, ultraviolet
C.
ultraviolet, visible, infrared
D.
infrared, visible, ultraviolet
Answers
Answer;
D.
infrared, visible, ultraviolet
Explanation;
Electromagnetic waves are types of waves that do not require a material medium for transmission. An electromagnetic spectrum arranges these electromagnetic waves in the order of increasing frequency and decreasing wavelength.
The spectrum consists of , Radio waves, microwaves, infrared, visible light, UV light, X-rays and Gamma rays; arranged in order of decreasing wavelength and increasing frequency.
Radio waves have the longest wavelength but the lowest frequency, while gamma rays have the lowest wavelength but the largest frequency.
Answer: D. infrared, visible, ultraviolet
Explanation:
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20°C.) *
Answers
Answer:
70g
Explanation:
Rate = 35g of NaCl can dissolve in 100g of H2O
Use proportions for 200g of H2O:
Since 200 is double of 100, x needs to be double of 35.
Therefore the maximum amount of NaCl that can dissolve in 200g of water is 70g.
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Answers
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The correct answer is 0.014467 M.
Molarity is defined as the number of moles present in a liter solution, that is, number of moles / liter solution.
The molar mass of sodium (Na) is 23.0 g/mol
Thus, 1 mole of Na contains 23.0 g
Now, x moles of Na contains 0.50 g
Moles = 0.50 × 1 / 23.0
Moles = 0.50 / 23.0
= 0.0217 moles of Na
Molarity = Number of moles / liters of solution
= 0.0217 / 1.5
= 0.014467 M