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Mkey [24]
3 years ago
15

What do you know about magnets?

Chemistry
1 answer:
natali 33 [55]3 years ago
3 0

Answer:

They attract, that they are inside our Earth and they make magnetic shield that protect us

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Cho m gam FeO tác dụng hết với dung dịch H2SO4, thu được 200 ml dung dịch FeSO4 1M. Giá trị của m là
BaLLatris [955]

<u>Answer:</u> The mass of FeO required is 14.37 g

<u>Explanation:</u>

Molarity is calculated by using the equation:

\text{Molarity}=\frac{\text{Moles}}{\text{Volume}} ......(1)

We are given:  

Molarity of iron (II) sulfate = 1 M

Volume of solution = 200 mL = 0.200 L (Conversion factor: 1 L = 1000 mL)

Putting values in equation 1, we get:

\text{Moles of }FeSO_4=(1mol/L\times 0.200L)=0.200mol

The chemical equation for the reaction of FeO with sulfuric acid follows:

FeO+H_2SO_4\rightarrow FeSO_4+H_2O

By stoichiometry of the reaction:

If 1 mole of iron (II) sulfate is produced by 1 mole of FeO

So, 0.200 moles of iron (II) sulfate will produce = \frac{1}{1}\times 0.200=0.200mol of FeO

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

We know, molar mass of FeO = 71.84 g/mol

Putting values in above equation, we get:

\text{Mass of }FeO=(0.200mol\times 71.84g/mol)=14.37g

Hence, the mass of FeO required is 14.37 g

4 0
3 years ago
What would be an example of a land form from magma?
notsponge [240]
An example of a land form from magma is B. Lava Plateau.
6 0
3 years ago
_________ deficiency is the developing world’s most common cause of preventable brain damage.
aniked [119]
I believe the answer is A. Iron
7 0
2 years ago
How much does 1 gallon of water weigh in lbs? <br> Given: Density of water = 1 g/cm^3
saw5 [17]

Answer:

8.35 US lbs.

You don't need to know density for this problem... although it is another way to get the same solution.

5 0
2 years ago
Why is silver metal precious but not as precious as gold
Soloha48 [4]

Explanation:

Because the greater the scarcity, the higher its price ... That is, silver is more present than gold

4 0
3 years ago
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