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Leokris [45]
2 years ago
5

For this experiment you want to prepare a 0.10 m solution of sodium hydroxide. how many grams of sodium hydroxide must be added

to give you 500.0 ml of that solution? question 1 options:
Chemistry
1 answer:
Degger [83]2 years ago
7 0
c×v
n (NaOH) = ------
1000

0.1 × 500
n (NaOH) = ----------------
1000
n (NaOH) = 0.05 moles

Mass= Mr(NaOH) × moles
Mass= (23+16+1) × 0.05
Mass=2.15 g (2.15 grams)
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How much heat must your body transfer to 500.0g of water to heat it from 25.0°C to body temperature, 37.0°C?
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Answer : The heat your body transfer must be, 25.1 kJ

Explanation :

Formula used :

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or,

Q=m\times c\times (T_2-T_1)

where,

Q = heat = ?

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c = specific heat of water = 4.18J/g^oC

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Now put all the given value in the above formula, we get:

Q=500.0g\times 4.18J/g^oC\times (37.0-25.0)K

Q=25080J=25.1kJ

Therefore, the heat your body transfer must be, 25.1 kJ

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