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Elodia [21]
3 years ago
5

2. How many calories are needed to raise 50 g of iron from 55°C to 200°C? (c = 0.110 cal/g °C)

Chemistry
1 answer:
lord [1]3 years ago
3 0

Answer:

Q = 797.5 cal

Explanation:

Given that,

Mass of iron, m = 50 g

The temperature rises from 55°C to 200°C.

We need to find the heat needed to raise the temperature. The heat raised is given by :

Q=mc\Delta T

Put all the values,

Q=50\times 0.11\times (200-55)\\\\Q=797.5\ cal

So, 797.5 calories of heat is needed.

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<h3>What are dependent and independent variables?</h3>

Dependent variable is a type of variable in which a variable whose value depends on another variable while on the other hand, independent variable is a type of variable in which a variable whose value does not depends on another variable. Dependent variable is denoted by X whereas the independent variable is denoted by Y.

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2 years ago
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Answer:

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Explanation:

5 0
3 years ago
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Which solution is most dilute?
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C. 0.1 M HCl

Explanation:

The solution with the lowest molarity is the most dilute of all.

This is why the choice is 0.1M of HCl.

Molarity is the same as concentration. The unit "M" denotes mole per liter volume of solution.

  • Molarity is defined as the number of moles of solute in a give volume of solution.
  • 0.1M means 0.1mole of HCl is dissolved in 1liter of solvent.
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The order of increasing concentration is:

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4 years ago
What is the concentration of each of these solutions expressed as a percent sucrose by mass?
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