3 years ago

Is scrap metal pieces an example of a pure substance or a mixture ?

Chemistry

2 answers:

Len [333]3 years ago

8 0

Answer:

mixture

Explanation:

eduard3 years ago

5 0

Answer:

mixture i think

Explanation:

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What is the balanced equation for the reaction of lead (II) nitrate and sodium chloride?

Sindrei [870]

Answer:

Pb(NO3)2+2NaCl \to PbCl2+NaNO3

Explanation:

Lead(II) nitrate is $Pb(NO_{3})_{2}$

Sodium Chloride is $NaCl$

This is a double displacement reaction. Hence anions or cations of both the compounds are displaced to form the products.

$Pb^{+2}$ and $Cl^{-}$ combine to form PbCl_{2}$

$Na^{+} and \,NO_{3}^{-} combine\, to\, form\, NaNO_{3}$

Therefore the balanced equation is

$Pb(NO_{3})_{2}(aq)+2NaCl(aq) \to PbCl_{2}(s)+2NaNO_{3}(aq)$

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If a fossil sample originally contained 5 grams of carbon-14 and the half-life of carbon-14 is 5,700 years.After 11,400 years ho

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