Answer:
58.44 g/mol The Molarity of this concentration is 0.154 molar
Explanation:
the molar mass of NaCl is 58.44 g/mol,
0.9 % is the same thing as 0.9g of NaCl , so this means that 100 ml's of physiological saline contains 0.9 g of NaCl. One liter of physiological saline must contain 9 g of NaCl. We can determine the molarity of a physiological saline solution by dividing 9 g by 58 g... since we have 9 g of NaCl in a liter of physiological saline, but we have 58 grams of NaCl in a mole of NaCl. When we divide 9 g by 58 g, we find that physiological saline contains 0.154 moles of NaCl per liter. That means that physiological saline (0.9% NaCl) has a molarity of 0.154 molar. We can either express this as 0.154 M or 154 millimolar (154 mM).
Answer:
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Explanation:
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Both technicians are correct because all the friction components of a disc brake are exposed to the airstream and this helps to cool the brake parts and maintain braking effectiveness during repeated hard stops from high speeds.
<h3>What is friction?</h3>
Friction can be defined as a force that resists the relative motion of two physical objects when there surfaces come in contact. This ultimately implies that, friction prevents two surface from easily sliding over or slipping across one another.
<h3>What is a braking system?</h3>
A braking system can be defined as a mechanical system which comprises various components that are designed and developed to bring an automobile vehicle in motion to a stop, when applied by a driver.
Generally, when the friction components which makes up a disc brake are exposed to the airstream, it helps to cool the brake parts, as well as to maintain braking system effectiveness in an automobile vehicle, during repeated hard stops from high speeds.
Read more on braking system here: brainly.com/question/24751467
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