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3 years ago

The answer is b :)

Physics

2 answers:

erastova [34]3 years ago

8 0

Answer:

then why do you ask?

Explanation:

lol anyways thanks for the points

xz_007 [3.2K]3 years ago

8 0

Answer:

Answer is letter B

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How many milliliters of water at 25.0°C with a density of 0.997 g/mL must be mixed with 162 mL of coffee at 94.6°C so that the r

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Answer:

The volume of water is 139 mL.

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The heat (Q) can be calculated using the following expression:

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$Q_{coffee} = - Q_{water}\\c_{c} \times m_{c} \times \Delta T_{c} = -c_{w} \times m_{w} \times \Delta T_{w}\\m_{c} \times \Delta T_{c} = -m_{w} \times \Delta T_{w}\\m_{w} = \frac{m_{c} \times \Delta T_{c}}{-\Delta T_{w}} \\m_{w}=\frac{162g \times (62.5 \°C - 94.6 \°C ) }{-(62.5 \°C - 25.0 \°C)} \\m_{w} = 139 g$

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