3 years ago

Can someone help me with this?

Chemistry

1 answer:

Nadusha1986 [10]3 years ago

4 0

Answer:

idk my man srry5678976543567890876546789087659687876875787678687367376367373

Explanation:

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elixir [45]

Answer:

The ability to do work is energy.

Hope it helps!!!

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3 years ago

What does the atomic number of an element refer to on the periodic table?

jekas [21]

The elements are listed in order of increasing the atomic number. Its the number that is the number of protons in the nucleus of an atom.

6 0

3 years ago

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slader An experiment is carried out where 13.9 g of solid NaOH is dissolved in 250.0 g of water in a coffee-cup calorimeter. Dis

kvv77 [185]

Answer:

The mass of the surrounding is $M_t = 263.9 \ g$

Explanation:

From the question we are told that

The mass of $NaOH$ is $m = 13.9 \ g$

The mass of water is $m_w = 250.0g$

The chemical equation for the dissociation process is

$NaOH _{(s) } ---> Na^{+}_{(aq)} + OH^{-} _{(aq)}$

The specific heat capacity of the mixture is $c_p = 4.18 J g^{-1} C^{-1}$

The combined mass of the solution is

$M_t = 13 + 250$

$M_t = 263.9 \ g$

The mass of the surround here is the mass of the coffee-cup calorimeter and this contain the mixture ( water and the NaOH ) so the mass of the surrounding is

$M_t = 263.9 \ g$

3 0

3 years ago

14 points!!! Pls tell me answer :3

iren [92.7K]

I’d say the last one

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3 years ago

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Describe what happens to an ionic compound when it has been fully dissolved in water

Marat540 [252]

When you immerse an ionic compound in water, the ions are attracted to the water molecules, each of which carries a polar charge. If the attraction between the ions and the water molecules is great enough to break the bonds holding the ions together, the compound dissolves.

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3 years ago