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3 years ago

Which solid is crumbly, weak, red-brown and in the periodic table (It's probably a metal)

Chemistry

1 answer:

slega [8]3 years ago

5 0

I think is nitrogen!!!

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You have 16.0 g of some compound and you perform an experiment to remove all of the oxygen, 11.2 g of iron is left. What is the

Makovka662 [10]

The empirical formula of this compound is $Fe_2O_3$

<h3>Empirical formula </h3>

To calculate the empirical formula of a compound, the value of moles of each element is needed.

As we have the information of the mass value, we will use the molar mass expression, which corresponds to:

$MM_O = 16g/mol\\MM_Fe = 55.8g/mol$

$MM = \frac{m}{mol}$

$16 = \frac{4.8}{x}$

$x = 0.3mol$

$55.8=\frac{11.2}{x}\\x = 0.2$

As the value of the empirical formula must be an integer, simply multiply the two values by a common factor:

$O = 0.3 \times 10 = 3\\Fe = 0.2 \times 10 = 2$

$Fe_2O_3$

So, the empirical formula of this compound is $Fe_2O_3$ .

Learn more about empirical formula: brainly.com/question/1247523

3 0

2 years ago

How many valence electrons does silicone have?

Talja [164]

It has four valence electrons

5 0

4 years ago

Read 2 more answers

Help me please, will give brainliest

koban [17]

What’s is the answer?
You didn’t write anything

5 0

3 years ago

Silver Nitrate.

stiv31 [10]

Explanation:

Except for the use in the chemistry laboratory , were it is used to synthesize many useful products, silver nitrate is also has biolofical and medical relevance.

Silver nitrate is commonly used for silver staining, for demonstrating the reticular fibers, the proteins and the nucleic acids. It is also used as stain in the scanning electron microscopy.

Silver Nitrate is also used for the bone ulcers as well as the burns and the acute wounds.

8 0

3 years ago

If the stocks in a system always decrease and never increase, the system has what type of feedback loop? (Select the best answer

AlekseyPX

A psitive feedback
rawmaterial waste

6 0

3 years ago