What state of matter has a definite shape and volume.

1 answer:

3 0

Solids have a definite shape and volume. They are always the same shape no matter what they are contained in; their volume is also the same because they don't change unless you add or take away from it.

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Liquids have an indefinite shape but definite volume. They expand to fill out the space they are contained in, but their volume doesn't change unless you take out or add more of the liquid.

Gases have an indefinite shape and volume. Gases expand to fill out the space they are in and also don't have a clear shape because they are not always in one form.

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What is the mass of 19.5 moles of carbon dioxide?

Olenka [21]

Explanation:

mass = moles * molar mass

molar mass of carbon dioxide (CO2) = 12+32 = 44

= 19.5* 44 = 858

proof

moles = mass /molar mass

= 858/44 = 19.5 moles

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Why does a solution of NaOH have to be standardized against a primary standard as supposed to just using the mass and volume to

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NaOH is hygroscopic

Explanation:

A standard solution is a solution of known molarity or concentration.
Standard solutions are used in determining the stoichiometric amount of desired species in an experiment.
A solution of NaOH is not a standard solution because NaOH is hygroscopic in nature.
By this, NaOH absorbs moisture from the atmosphere in considerable amount.
This implies that one must find an air free environment to store and use the compound and accurately quantify it.
This is why a solution of NaOH is standardize with a primary standard.

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Titration brainly.com/question/4306497

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Ierofanga [76]

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