HCIO4 perchloric acid KS03 potassium sulifte Fe20s [iron (ll) oxide PCls hophoro

Question

HCIO4 perchloric acid KS03 potassium sulifte Fe20s [iron (ll) oxide PCls hophorou Hl bydrolodlc aed As2Fe s pentachloride QUESTION 20 You find a substance in a jar that appears to be a clear and colorless liquid, and it appears to be uniform throughout. You decide to heat the substance to boiling. After it boils away, a white, solid residue is left stuck to the sides and bottom of the jar, even though no chemical reaction seems to have occurred. Which of the choices below best classifies your original Homogeneous mixture O Heterogeneous mixture O Compound O Element QUESTION 21 Which of the following substances meets the definition of a "compound?" Place a check next to all choices that apply Pure iron metal: Fe A crystal of pure salt: NaCl Click Save and Submit to save and submit.Click Save ll Answers to save all a

Explanation / Answer

ans) heterogenous mixture.

reason:

1. if it is homogeneous mixture,both have same phase;i.e both must be liquids.but according question,after evaporation one solid is left,that is both are of different phases.it shows its a heterogeneous mixture.

if its a compound or element,then the whole sample should be evaporated as there is no chemocal reaction as iven in the question.

so the sample is a heterogeous mixture.

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