The correct answer is A.
Explanation: An radar uses electromagnetic waves to attempt to discover objects far away such as air craft, ships, missiles etc.
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Answer: doing it right now
Explanation:
the picture
Answer:
The answer is Nitrogen has a larger radius and one less proton than oxygen.
Explanation:
Nitrogen is a gas and gas expands to fill up an area so oxygen would be pushed out and the Nitrogen would take over.
The question is incomplete, here is the complete question:
Calculate the mole fraction of the ionic species KCl in the solution A solution was prepared by dissolving 43.0 g of KCl in 225 g of water.
<u>Answer:</u> The mole fraction of KCl in the solution is 0.044
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
.....(1)
Given mass of water = 225 g
Molar mass of water = 18 g/mol
Putting values in equation 1, we get:
Given mass of KCl = 43 g
Molar mass of KCl = 74.55 g/mol
Putting values in equation 1, we get:
Mole fraction of a substance is given by:
Moles of KCl = 0.577 moles
Total moles = [0.577 + 12.5] = 13.077 moles
Putting values in above equation, we get:
Hence, the mole fraction of KCl in the solution is 0.044
Isotopes are always expressed in decimals.