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yaroslaw [1]
2 years ago
7

Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. Three different peo

ple weigh a standard mass of 2.00 g on the same balance. Each person obtains a reading of 7.32 g for the mass of the standard. These results imply that the balance that was used is ____. a. accurate b. precise c. accurate and precise d. neither accurate nor precise
Chemistry
2 answers:
Kamila [148]2 years ago
7 0
B) just fount out.....................
melisa1 [442]2 years ago
5 0
The answer is letter B. I hope that helped.<span />
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-- A scientist combines 14 grams of potassium nitrate with an unknown amount of
igor_vitrenko [27]

Answer:

The unknown amount of potassium chloride is 13.6 grams.            

 

Explanation:

The reaction of 14 grams of KNO₃ with KCl produces a total mass of 27.6 grams of the products.

The law of conservation of mass tells us that the total mass of the reactants must be the same that the total mass of the products. So, we can find the mass of KCl as follows:

m_{r} = m_{p}

Where <em>r</em> is for reactants and <em>p </em>is for products

m_{KNO_{3}} + m_{KCl} = m_{p}

14 g + m_{KCl} = 27.6 g

m_{KCl} = 27.6 g - 14 g = 13.6 g

Therefore, the unknown amount of potassium chloride is 13.6 grams.           

I hope it helps you!

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