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horrorfan [7]
3 years ago
10

a reagent bottle (labelled) is filled with HCL solution and the other (labelled as b) is filled with water. both liquids in the

bottle are colourless. what method do you recommend to identify the acid and water?
Chemistry
1 answer:
romanna [79]3 years ago
6 0

Answer:

There are several methods - look at the explanation.

Explanation:

So first you can use cobal chloride paper which turns from blue to pink when water is present or you can use anhydrous copper sulfate which turns from white to blue and the blue substance would be called hydrated copper sulfate which is formed when water and anhydrous copper sulfate mix.

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Answer:

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Explanation:

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Some of the factor that affect the plant growth are : sunlight, air, proper temperature, moisture, nutrients, wind,etc.

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8 0
3 years ago
How many formula units are there in 450 g of Na2S04?
Mashutka [201]

Formula units in 450 g of Na_{2} So_{4} is 1.93 × 10²⁴ formula units.

<u>Explanation:</u>

First we have to find the number of moles in the given mass by dividing the mass by its molar mass as,

$\frac{450 g}{142.04 g/mol} =  3.2 moles

Now, we have to multiply the number of moles of Na₂SO₄ by the Avogadro's number, 6.022 × 10²³ formula units/mol, so we will get the number of formula units present in the given mass of the compound.

3.2 mol × 6.022 × 10²³ = 1.93 × 10²⁴ formula units.

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4 0
3 years ago
Which example indicates that a chemical change has occurred? *
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A. When two aqueous solutions are mixed, a precipitate is formed.

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The other three answer choices are indicative of physical changes (temperature change, phase change, color change).

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your answer would be C. 240g

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