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Anna11 [10]
3 years ago
10

9. Mangnesium can form compounds by acting with different oxidation numbers (2-, 3+, 4+, 6+, 7+). Argue your answer.

Chemistry
1 answer:
erastovalidia [21]3 years ago
6 0
D is the right answer
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How much heat is required to raise the temperature of 81.0 g of water from its melting point to its boiling point?
Dovator [93]

Answer:

Specific heat of water = 33.89 KJ

Explanation:

Given:

mass of water = 81 gram

Initial temperature = 0°C

Final temperature = 100°C

Specific heat of water = 4.184

Find:

Required heat Q

Computation:

Q = Mass x Specific heat of water x (Final temperature - Initial temperature)

Q = (81)(4.184)(100-0)

Q = 33,890.4

Specific heat of water = 33.89 KJ

6 0
3 years ago
What is the formula of this<br> inorganic salt hydrate?
barxatty [35]

Salt hydrates are an important class of PCMs. An inorganic salt hydrate (hydrated salt or hydrate) is an ionic compound in which the ions attract a number of water molecules, which are then trapped inside the crystal lattice. A hydrated salt has the generic formula MxNy. nH2O.

7 0
2 years ago
Which substance has the greatest of elements?<br> Sugar 45 elements
Nutka1998 [239]

Answer: Which elements are found in the greatest number of substances?

...

Chemical Name Sucrose

Chemical Formula C12H22O11

Number of Elements 3

Name of Elements Carbon, Hydrogen, Oxygen

Number of Atoms 45

Explanation:

7 0
3 years ago
If you were givin 2.50 moles of.sodium bromide, how many grams of salt do you have
mihalych1998 [28]

Answer: 257.23

Explanation:

7 0
3 years ago
Which method of heat transfer takes place when particular of matter vibrate and collide with each other in direct contact?
Luden [163]
Conduction - by touch
Convection - hot air rises, cold air sinks
Insulation - to insulate or capture heat
Radiation - by waves
Direct contact means touch, therefore the answer would be conduction.
5 0
3 years ago
Read 2 more answers
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