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yKpoI14uk [10]
3 years ago
9

Why are intensive properties useful for identifying a subtenant?

Chemistry
1 answer:
g100num [7]3 years ago
8 0
Because these characteristics do not depend on the amount of sample, nor do they change according to conditions.
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A student with an unknown code of Q3A conducts a qualitative analysis of her unknown. Her results indicated the formation of a y
insens350 [35]

Answer:

Grey precipitate implies the presence of silver ions

Yellow precipitate implies the presence of lead II ions

Explanation:

Qualitative analysis provides us a quick method of identifying ions present in a sample by chemical reactions involving simple reagents. Precipitates having a unique colour is formed. The identity of ions in the sample is deduced from the colour of precipitate obtained when particular reagents are added.

In the question, a precipitate containing silver ions upon standing turn into grey colour. Similarly, lead II ions give a yellow precipitate.

6 0
3 years ago
Combine magnesium metal and hydrochloric acid solution. Mg + HCl →
padilas [110]

Answer:

See below.

Explanation:

This will give magnesium chloride solution and hydrogen gas will evolve.

Mg(s) + 2HCl(l) ---> MgCl2(l) + H2(g)

3 0
3 years ago
15. The mass of a sample of iron is 114 g, and the density of iron is 7.86 g/cm3. What is the volume of this iron sample?
anyanavicka [17]

Answer:

The answer is

<h2>14.50 cm³</h2>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density}

From the question

mass of iron = 114 g

density = 7.86 g/cm³

The volume is

volume =  \frac{114}{7.86}  \\  = 14.50381679

We have the final answer as

<h3>14.50 cm³</h3>

Hope this helps you

5 0
3 years ago
What is the law of multiple proportions?
quester [9]

Answer:

I think

(d) All compounds contain the same elements in the same properties

6 0
3 years ago
Using your own words, explain energy.
never [62]
Energy is the ability to do work
3 0
3 years ago
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