Which defines the word planet?
1 answer:
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Answer:
The concentration of the solution is 2.86 M
Explanation:
Molarity is a unit of concentration based on the volume of a solution. It is defined as the number of moles of solute that are dissolved in a given volume. In other words, molarity is defined as the number of moles of solute per liter of solution.
The Molarity of a solution is determined by the following expression:
Molarity is expressed in units ().
In this case, you must then know the number of moles of HF, for which you must know the molar mass. Being:
- H: 1 g/mole
- F: 19 g/mole
the molar mass of HF is: HF= 1 g/mole + 19 g/mole= 20 g/mole
Then the following rule of three applies: if 20 g of HF are available in 1 mole, 14.3 g in how many moles will they be?
moles= 0.715
So:
- number of moles of solute: 0.715 moles
- Volume: 250 mL=0.250 L (being 1 L=1000 mL)
Replacing:
Solving:
Molarity= 2.86 =2.86 M
<u><em>The concentration of the solution is 2.86 M</em></u>
Explanation:
Find the motion diagram attached for the illustration:
Distance is the length of path traveled from the start to the finish. In measuring distance, we wall through the path from start to the finishing point. Distance is a scalar magnitude that has magnitude but no direction.
Displacement is distance that is taken between the start and finishing point. It is a vector quantity that has magnitude and measures direction.
To find the distance;
Distance = 5km + 7km = 12km
Displacement:
Using pythagoras theorem;
Displacement = √7² + 5² = 8.6km
Direction:
sin(bearing ) =
bearing = arcSin 0.5814 = 035.6°
Displacement is 8.6km in a direction 035.6°
learn more:
Displacement brainly.com/question/6123316
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