4 years ago

Is mercury in a thermometer a pure substance or a mixture?

1 answer:

8 0

Pure mercury contains nothing else but mercury; it is an element, one of the chemical building blocks from which chemical compounds and mixtures are assembled.

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UkoKoshka [18]

Answer:

+180kJ

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3 years ago

Them empirical formula of an artificial sweetener is c14h18n2o5 the molecular mass is 294.34 what is the molecular formula

nadezda [96]

C14H18N2O5
In limiting reactions and chemical reactions.

3 0

3 years ago

Which of the following actions demonstrates compression of a gas? exhaling air from your lungs lighting a fire turning on an ele

wariber [46]

Exhaling air from your lungs

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4 years ago

Read 2 more answers

Which net ionic equation would match this description of a chemical reaction: When a

krok68 [10]

Answer:

$3Mg^{2+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)$

Explanation:

$Mg(NO_{3})_{2}$ , $Na_{3}PO_{4}$ are strong electrolytes. Hence they are fully ionized in aqueous solution.

$Mg_{3}(PO_{4})_{2}$ is a sparingly soluble salt. Hence it remains undissociated in aqueous solution.

So, total ionic equation:

$3Mg^{2+}(aq.)+6NO_{3}^{-}(aq.)+6Na^{+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)+6Na^{+}(aq.)+6NO_{3}^{-}(aq.)$

Net ionic equation is written by omitting spectator ions from total ionic equation.

Here, $Na^{+}$ and $NO_{3}^{-}$ ions are spectator ions as they remain present on both side of total ionic equation.

So, net ionic equation:

$3Mg^{2+}(aq.)+2PO_{4}^{3-}(aq.)\rightarrow Mg_{3}(PO_{4})_{2}(s)$

So, option (d) is correct.

6 0

3 years ago

Which quantity is equal to one Au

andriy [413]

The atomic mass in grams is equal to Au

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3 years ago