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ruslelena [56]
3 years ago
5

Which term refers to a universal fact sometimes based on mathematical equations?

Chemistry
1 answer:
V125BC [204]3 years ago
6 0
<span>The answer is scientific law. This continuously relates in the same circumstances, and suggests that there is a fundamental association connecting its elements. Truthful and well-confirmed statements like "Mercury is liquid at STP" are measured too exact to be suitable as scientific laws. </span>
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Which is a dominant trait that Mendel observed in pea plants?
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Often in organic synthesis reactions, multiple products will be synthesized that need to be separated from each other. The separ
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Answer:

True

Explanation:

The chemical method of separating two compounds depends on their difference in solubility in water, ether, dilute acid or alkali. Separatory funnel thus, are used to distinguish immiscible fluids from their solutes. The funnel is usually made of glass, pear-shaped, and usually contains a stopper and a stopcock.

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A sample of hydrated magnesium sulfate (MgSO4)
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Answer:

MgSO4.7H2O

Explanation:

Let the formula for the hydrated magnesium sulphate be MgSO4.xH2O

Mass of the hydrated salt (MgSO4.xH2O) = 12.845g

Mass of anhydrous salt (MgSO4) = 6.273g

Mass of water molecule(xH2O) = Mass of the hydrated salt — Mass of anhydrous salt = 12.845 — 6.273 = 6.572g

Now,we can obtain the number of mole of water molecule present in the hydrated salt as follows:

Molar Mass of hydrated salt (MgSO4.xH2O) = 24 + 32 + (16x4) + x(2 + 16) = 24 + 32 + 64 + x(18) = 120 + 18x

Mass of xH2O/ Molar Mass of MgSO4.xH2O = Mass of water / mass of hydrated salt

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Cross multiply to express in linear form

18x x 12.845 = 6.572(120 + 18x)

231.21x = 788.64 + 118.296x

Collect like terms

231.21x — 118.296x = 788.64

112.914x = 788.64

Divide both side by 112.914

x = 788.64 /112.914

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Therefore the formula for the hydrated salt (MgSO4.xH2O) is MgSO4.7H2O

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Ar 3d10 4s2 4p1

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