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3 years ago

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The process or method , by which a magnet loses its power , is called…………………… ..

1 answer:

andrey2020 [161]3 years ago

3 0

Answer:

I think it is called demagnetisation.

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the specific heat of aluminum is 0.897 j/g degrees celsius. if a 22.6 g sample of aluminum is heated from 25 degrees celsius to

Akimi4 [234]

4,561.245 Joules
Q = Mass x Change in Temperature x Specific Heat
Q = 22.6 x 225 x .897

3 0

3 years ago

Explain how elements are arranged on the periodic table. What does the table tell you when you read it like sentences in a book

DochEvi [55]

Explanation:

In periodic table:

Elements are arranged according to their atomic number in increasing order.
When we move left to right we move along a period.The period in the periodic table tell us about the principal quantum number,(n).
When move from top to bottom we are moving in group. The group in the periodic table tell us about the number of the valence electrons present in the valence shell of the elements of the particular group.

3 0

3 years ago

Read 2 more answers

Consider the reaction Mg₂Si(s) + 4 H₂O(ℓ) → 2 Mg(OH)₂(aq) + SiH₄(g). How many grams of silane gas (SiH₄) are formed if 25.0 g of

Neko [114]

Answer:

10.60 grams of silane gas are formed.

Explanation:

From the reaction:

Mg₂Si(s) + 4H₂O(l) → 2Mg(OH)₂(aq) + SiH₄(g)

We know that the limiting reactant is Mg₂Si, so to find the mass of SiH₄ formed we need to calculate the number of moles of Mg₂Si:

$\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}}$

Where:

m: is the mass of Mg₂Si = 25.0 g

M: is the molar mass of Mg₂Si = 76.69 g/mol

$\eta_{Mg_{2}Si} = \frac{m_{Mg_{2}Si}}{M_{Mg_{2}Si}} = \frac{25.0 g}{76.69 g/mol} = 0.33 moles$

Now, the stoichiometric relation between Mg₂Si and SiH₄ is 1:1 so:

$\eta_{Mg_{2}Si} = \eta_{SiH_{4}} = 0.33 moles$

Finally, the mass of SiH₄ is:

$m_{SiH_{4}} = \eta_{SiH_{4}}*M_{SiH_{4}} = 0.33 moles*32.12 g/mol = 10.60 g$

Therefore, 10.60 grams of silane gas are formed.

I hope it helps you!

3 0

3 years ago

Which would be the first of the two magnetic mentals in the mixture to be Melted? A. Copper B. Iron C. Nickel D. Yin

marissa [1.9K]

Answer:D. Tin

Explanation:

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3 years ago

A sodium atom has a mass number of 23. Its atomic number is 11. How many electrons does a neutral sodium atom have?

NemiM [27]

Answer:

it contains 11 electrons

Explanation:

4 0

3 years ago