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4 years ago

What are differences and similarities between pure substances and mixtures

Chemistry

1 answer:

Snezhnost [94]4 years ago

5 0

Answer:

HELLO THERE!

I HOPE MY ANSWER WILL HELP YOU :)

Explanation:

There is this picture that helped me. I hope it helps you too.

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A eraser has a mass of 4g and a volume of 2cm3 what is it’s density

sladkih [1.3K]

Answer:

<h3>The answer is 2.0 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 4 g

volume = 2 cm³

We have

$density = \frac{4}{2} \\$

We have the final answer as

Hope this helps you

4 0

3 years ago

What happens inside a closed car on a hot day? -APEX

lisabon 2012 [21]

The pressure inside the car increases.

7 0

3 years ago

Read 2 more answers

When hot lava reaches seawater, the salts in the water react with steam to form gaseous hydrochloric acid. You are given an unba

elena-s [515]

<span>NaCl + H2O = HCl + NaOH

1) write the equation and balance the equation
2) convert the volume of the gas to moles of the gas PV=nRT
3) according to the stoichiometry of the reaction one mol of gas is produced by one mol of salt. Convert the mol of gas to mol of salt
4) calculate the molar mass of the salt and convert the mol of salt to g of salt (m= nxMM)</span>

3 0

3 years ago

Read 2 more answers

Copper sulfate is a blue solid that is used to control algae growth. Solutions of copper sulfate that come in contact with the s

xenn [34]

Answer:

185.5156 g

Explanation:

The reaction of copper sulfate with zinc is shown below as:

$CuSO_4+Zn\rightarrow ZnSO_4+Cu$

Given that :

Amount of copper sulfate = 454 g

Molar mass of copper sulfate = 160 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus, moles are:

$moles= \frac{454\ g}{160\ g/mol}$

$moles\ of\ copper\ sulfate= 2.8375\ mol$

From the reaction,

1 mole of copper sulfate reacts with 1 mole of zinc

Thus,

2.8375 moles of copper sulfate reacts with 2.8375 moles of zinc

Moles of Zinc that should react = 2.8375 moles

Mass of zinc= moles×Molar mass

Molar mass of zinc = 65.38 g/mol

Mass of zinc = 2.8375 ×65.38 g = 185.5156 g

8 0

3 years ago

What reagent would distinguish between Ag+ and Fe3+?

Andreyy89

The reagent which is used is "NaI", that is Sodium iodide.
When the reagent sodium iodide is added to distinguish the Ag⁺ ions and Fe³⁺ ions, it will react and form precipitate with one, while have no precipitates formed with the other, so that is how we can distinguish both of them.

8 0

3 years ago