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3 years ago

With three temperature readings all mean the same thing?

2 answers:

8 0

The answer is C) 373 Kelvin, 100 degrees Celsius, 212 degrees Fahrenheit. This is the boiling point of water.

Hope this helps! :)

Mama L [17]3 years ago

3 0

Ans: C

Temperature can be expressed in terms of :

Kelvin (K), Celsius (C) or Fahrenheit (F)

The three units are interchangeable.

1) Kelvin(K) and Celsius(C)

K = 273 + C ----(1)

2) Celsius(C) and Fahrenheit(F)

F = (C*9/5) + 32 ---(2)

Option C is correct because:

From eq(1), when C = 100

K = 273 + 100 = 373

From eq(2), when C = 100

F = (100*9/5)+32 = 212

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2 years ago

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2 years ago

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3 years ago

Tony tuns on a fan on when his room becomes uncomfortably hot. The fan is an example of?

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C-Electrical energy changed into mechanical energy

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3 years ago

Calculate the molality of a 10.0% by mass solution of NaCl ______ m

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Answer:

$\large \boxed{\text{0.180 mol/kg }}$

Explanation:

Assume 100 g of solution.

Then you have 10.0 g of NaCl and 90.0 g of water.

$\text{Molal concentration} = \dfrac{\text{moles of solute}}{\text{kilograms of solvent}}$

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$\text{Moles of NaCl} = \text{10.0 g NaCl} \times \dfrac{\text{1 mol NaCl}}{\text{58.44 g NaCl}} = \text{0.1711 mol NaCl}$

2. Kilograms of water

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3. Molal concentration

$\text{Molal concentration} = \dfrac{\text{0.1711 mol}} {\text{0.0900 kg}} = \textbf{1.90 mol/kg}\\\\\text{The molal concentration of the solution is $\large \boxed{\textbf{0.180 mol/kg }}$}$

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3 years ago