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Sophie [7]
3 years ago
6

Consider this combination reaction:

Chemistry
1 answer:
Anuta_ua [19.1K]3 years ago
8 0
Since the decomposition of MgO is the reverse of the reaction you have given us. The sign will be reversed:

2MgO -> 2Mg + O2 =  1204 kJ

Divide by two:

MgO -> Mg + 1/2 O2 =

602 kJ

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If nothing eats a hawk what might eventually happen to the energy that is stored in its body
prisoha [69]
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6 0
4 years ago
Read 2 more answers
which of the following chemical structures can form hydrogen bonds with water? Methane (CH4), molecular oxygen (O2), hydrogen su
klio [65]

Answer:

Molecular oxygen and Hydrogen fluoride.

Explanation:

Definition:

Hydrogen bonding:

It is a type of dipole-dipole attraction between the hydrogen atom and more electronegative atoms.

In hydrogen bonding mostly the highly electronegative atoms are fluorine, nitrogen and oxygen.

Explanation:

In given compound such as methane CH₄ the electronegativity of carbon is 2.55 while that of hydrogen is 2.2 so there is smaller electronegativity difference that's why it can not form hydrogen bond.

In case of molecular oxygen the electronegativite atom oxygen is present. It can form hydrogen bonds with water. its electronegativity is 3.44.

In case of hydrogen fluoride the electronegativity atom fluorine is present. It will form hydrogen bonds with water. Its electronegativity is 3.98. So it is more likely to take part in hydrogen bonding.

8 0
3 years ago
How many molecules are in 3 moles of NaCl?
PtichkaEL [24]

Answer:

Given : No. Of moles = 1.5

To calculate : no. Of molecules =N

We know that moles = N / 6.022 x 10²³

Therefore, 1.5 x 6.022 x 10²³ = N

Hence N = 9.0330x 10²³ molecules

3 0
3 years ago
Objects take on______ when they are lifted against the force of gravity to a position where they have the potential to fall.
Papessa [141]

A. because you haven't released the object so therefor the potential gravity force applied becomes actual when released.

8 0
4 years ago
What is the state of nitrogen balance when a person ingests 13 g of food nitrogen and loses 21 g of nitrogen?
son4ous [18]

Answer:

- 7 g

Explanation:

Balancing of Nitrogen is a measure that deals with the difference between   nitrogen intake  and nitrgen loss

Nitrogen Balance = Nitrogen intake - Nitrogen loss

Given that

the nitrogen intake = 13 g  and

the  nitrogen loss= 21 g

Therefore nitrogen balance = nitrogen intake - nitrogen loss

= (13 - 21)g = -7 g

Thus, there is a negative nitrogen balance, meaning that the amount of nitrogen excreted from the body is greater than the amount of nitrogen ingested.

8 0
3 years ago
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