2 years ago

Adding _______ causes the particles in a solid, liquid, or gas to move farther apart and faster.

Chemistry

1 answer:

irakobra [83]2 years ago

3 0

Heat will be correct

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Which of the data sets qualitative data?

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A chemist mixes 75.0 g of an unknown substance at 96.5°C with 1,150 g of water at 25.0°C. If the final temperature of the system

AleksAgata [21]

To do this problem it is necessary to take into account that the heat given by the unknown substance is equal to the heat absorbed by the water, but considering the correct sign:

$-m\cdot c_e\cdot \Delta T = m_w\cdot c_e_w\cdot \Delta T_w$

Clearing the specific heat of the unknown substance:

$c_e = \frac{m_w\cdot c_e_w\cdot \Delta T_w}{m\cdot \Delta T} = -\frac{1\ 150\ g\cdot 4.184\frac{J}{g\cdot ^\circ C}\cdot (37.1 - 25.0)^\circ C}{75\ g\cdot (37.1 - 96.5)^\circ C}$

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2 years ago

What is the charge of a carbon ion that has gained 4 electrons?

olya-2409 [2.1K]

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Negative

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Any atom gaining electrons will get a negative change since the charge of the electron is negative.

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