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lutik1710 [3]
3 years ago
7

Which elements are magnetic in the periodic table?

Chemistry
1 answer:
rosijanka [135]3 years ago
3 0
METALS ARE MAGNETIC(and maybe metalloids)

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Iron(iii) oxide is formed when iron combines with oxygen in the air. How many moles of Fe2O3 are formed when 55.8 g or Fe reacts
iogann1982 [59]

Answer: The correct answer is Option B.

Explanation:

To calculate the number of moles, we use the formula:

Moles=\frac{\text{Given mass}}{\text{Molar mass}}

  • <u>Moles of Iron</u>

Molar mass of iron = 55.8 g/mol

Given mass of iron = 558.8

Putting values in above equation, we get:

Moles=\frac{55.8g}{55.8g/mol}=1mole

For the given chemical equation:

4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3(s)

By Stoichiometry,

4 moles of Iron produces 2 moles of Iron(III) oxide

So, 1 mole of Ion will produce = \frac{2}{4}\times 1 = 0.5 mole of Iron (III) oxide.

Hence, the correct answer is Option B.

8 0
2 years ago
13. What is the atomic mass of an atom if its mass is approximately equal to the following? 1 a. that of carbon-12 b. 4.5 times
12345 [234]

The atomic mass of an atom if its mass is approximately equal to carbon-12 will be 12 and in case of 4.5 times carbon-12 will be 54

Atomic mass of an element is the average mass of the atoms of an element which are measured in atomic mass unit. Or we can also say that the atomic mass is actually the weighted mass is a weighted average of all of the isotopes of elements, in which the mass of each element is multiplied by the abundance of that particular isotope.

So the atomic mass of an atom if the mass is approximately equal to carbon-12 then the mass of the element will be equal to 12 as the atomic mass of carbon-12  is 12.

where as the atomic mass of an atom if its mass is approximately equal to 4.5 times as much as carbon-12 will be ⇒ 4.5×12= 54

To know more about atomic mass

brainly.com/question/16887530

#SPJ1

6 0
10 months ago
3. How many grams of potassium permanganate will react with 36 grams of iron(III)<br>hydroxide? ​
Mrac [35]

7 would be correct because I divide it

8 0
3 years ago
Lewis Diagrams- Grade 10 Chemistry<br><br> Please can someone explain this to me?
natita [175]
Lewis diagram:
well first you have to know the Valence electrons the elements which will on top of the periodic table.

for examples:
H2O
it will be O-H-O and the dots will on top. oxygen have 6 valence electrons so that mean it need 6 dots. also for H it will have 7 V-electrons.
3 0
2 years ago
"what is the probability of finding an electron within one bohr radius of the nucleus"
Katena32 [7]
Your answer is going to be b
6 0
3 years ago
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