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mr Goodwill [35]
3 years ago
7

Which is an example of a compound ? sand , gold , water , iodine

Chemistry
2 answers:
OleMash [197]3 years ago
4 0
Which is an example of a compound? sand, gold, water, or iodine? well, the answer is water, water is a compound.
Licemer1 [7]3 years ago
4 0

Answer:  Water

Explanation:  Compound is a substance which is formed by the linkage of different or same kind of atoms.

It is absically composed of two or more elements.

Thus out of the given options, sand is composed of Silica (Si) , gold (Au) is the single element, Iodine (I2) is an diatomic element itself.

Water is made up of  2 moles of hydroge and one mole of oxygen. Thus it will be considered as a compound.

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How many grams of calcium chloride will be produced when 29.0 g of calcium carbonate is combined with 15.0 g of hydrochloric aci
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Answer:

22.7 g of CaCl₂ are produced in the reaction

Explanation:

This is the reaction:

CaCO₃ +  2HCl  →  CaCl₂  + CO₂  +  H₂O

Now, let's determine the limiting reactant.

Let's divide the mass between the molar mass, to find out moles of each reactant.

29 g / 100.08 g/m = 0.289 of carbonate

15 g / 36.45 g/m = 0.411 of acid

1 mol of carbonate must react with 2 moles of acid

0.289 moles of carbonate will react with the double of moles (0.578)

I only have 0.411 of HCl, so the acid is the limiting reactant.

Ratio is 2:1, so I will produce the half of moles, of salt.

0.411 / 2 = 0.205 moles of CaCl₂

Mol . molar mass = mass → 0.205 m . 110.98 g/m = 22.7 g

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