Oliver and Mike put some ice into a container and heat it .

Chemistry

1 answer:

algol [13]2 years ago

7 0

Answer:

See below

Explanation:

From the graph: initial temp = -10 ° C

melting occurs at 0 ° C (constant temp process)

at '2' the ice is melting.....going from a solid to a liquid at a constant temperature

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The number of positive charges in the nucleus of an atom is equal to:

frutty [35]

The answer is 2) Its atomic number because that’s what the protons represent

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What varieties of matter may be the constituents in mixtures?

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Answer: two or more different pure substances, which may be elements or compounds.

Explanation:

The term varieties of matter is kind of ambiguos since it is not defined.

The best approach to the question is to think of matter as it can be classified into to kinds: pure substaces and mixtures.

Elements and compounds are pure substances.

Elements are pure substances constituted by only one kind of atoms. An element cannot be divided into simpler substances either by physical or chemical media.

A compound is a chemical combination of two or more different elements. A compound can be divided into simpler substances by chemical reactions, but not by physical media. The properties of compounds are different of those of the elements of which they are constituted. The composition of a compoind (ratio among its elements) is fixed.

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3 years ago

Calculate the pressure exerted by 1.0 mol of C6H6behaving as a)a perfect gas and b) a van der Waals gas when it is confined unde

Sholpan [36]

Answer:

The detailed calculation is shown in the attached file.

last condition (1000 K in 150.000 dm3) will have the least deviations and it is the condition where real gas will behave as ideal gases

Explanation:

Real gas behave more ideally or they tend towards ideality when there is the least deviation, or their inter-molecular forces between their molecules are mainly responsible for their deviations as such gases with the strongest intermolecular forces shows the strongest deviations. As such, when their is an increase in temperature and volume and a decrease in pressure, real gas tends towards ideal gas in this case.

From the three conditions given, it is obvious that the last condition(1000 K in 150.000 dm3) will have the least deviations.

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4 years ago

An ideal gas does not exist.

ozzi

Answer:

an ideal gas does not exist except as a conceptual notion, an ideal. Physicists and chemists idealized the behaviour of real gases so that they could explain these phenomena. Under conditions of low pressure and high temperature, all gases behave like real gases, even gases such as UF6 .

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3 years ago

What mass of iron(II) oxide must be used in the reaction given by the equation below to release 44.7 kJ? 6FeO(s) + O2(g) => 2

zavuch27 [327]

<u>Answer:</u> The mass of iron (II) oxide that must be used in the reaction is 30.37

<u>Explanation:</u>

The given chemical reaction follows:

$6FeO(s)+O_2(g)\rightarrow 2Fe_3O_4(s);\Delta H^o=-635kJ$