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snow_lady [41]
3 years ago
13

Which substance gives heat and light after combustion?

Chemistry
1 answer:
Mariulka [41]3 years ago
7 0

Answer:

Magnesium oxide

Explanation:

The substance which undergoes combustion is said to be combustible.It is called fuel. If a magnesium ribbon is heated,it starts burning. When a magnesium ribbon burns,it combines with the oxygen of air to form magnesium oxide,and liberates heat and light.

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A 3000 MWt fast reactor has a 42% efficiency. This reactor operates for 23 months followed by a 1 month down time for refueling
n200080 [17]

Answer:

capacity factor = 0.952

Availability factor = 0.958

Explanation:

1) capacity factor

capacity factor = actual power output /  maximum power output

                        = (actual power output)/(efficiency * rated power output)

                       = \frac{1200}{\frac{42}{100}*3000}

= 0.952

2) Availability factor

Availability factor  = Actual operation time period/ total time period

                            = 23/24 = 0.958

8 0
3 years ago
31. Adding an additional oxygen atom to 02 creates....
cricket20 [7]
It creates chlorofluorocarbons(CFCs) also would create biooxygen but in the multiple choice it only shows the CFCs
4 0
3 years ago
O tetraclorometano é um solvente muito utilizado na indústria de transformaç?o de produtos orgânicos ele é produzido pela reaç?o
Vlada [557]

Answer:

ΔHr = -103,4 kcal/mol

Explanation:

<u>Using:</u>

<u>AH° (kcal/mol) </u>

<u>Metano (CH) </u>

<u>-17,9 </u>

<u>Cloro (CI) </u>

<u>tetraclorometano (CCI) </u>

<u>- 33,3 </u>

<u>Acido cloridrico (HCI) </u>

<u>-22</u>

It is possible to obtain the ΔH of a reaction from ΔH's of formation for each compound, thus:

ΔHr = (ΔH products - ΔH reactants)

For the reaction:

CH₄(g) + Cl₂(g) → CCl₄(g) + HCl(g)

The balanced reaction is:

CH₄(g) + 4Cl₂(g) → CCl₄(g) + 4HCl(g)

The ΔH's of formation for these compounds are:

ΔH CH₄(g): -17,9 kcal/mol

ΔH Cl₂(g): 0 kcal/mol

ΔH CCl₄(g): -33,3 kcal/mol

ΔH HCl(g): -22 kcal/mol

The ΔHr is:

-33,3 kcal/mol × 1 mol + -22 kcal/mol× 4 mol - (-17,9 kcal/mol × 1 mol + 0kcal/mol × 4mol)

<em>ΔHr = -103,4 kcal/mol</em>

<em></em>

I hope it helps!

3 0
3 years ago
In relation to chemical solutions, which term does not express a degree of saturation?
Marizza181 [45]
The answer is D. oversaturated. The term to represent the solution contains more solid solute than saturated solution is supersaturated, not oversaturated.
4 0
3 years ago
Read 2 more answers
When collecting a gas over water, the gas is always a mixture of the gas collected and water vapor. question 5 options:
Lunna [17]

When collecting gas over water, the gas is always a mixture of the gas collected and water vapor. This statement is true.

The gaseous phase of water is known as water vapor or aqueous vapor. Within the hydrosphere, it is one type of water state. Water vapor can be created by the boiling or evaporation of liquid water as well as by the sublimation of ice. Like the majority of other atmospheric elements, water vapor is transparent. The mist that hovers above a saucepan of boiling water is an illustration of water vapor.

Gaseous water, particularly when it is distributed in the atmosphere. Steam. The most frequent greenhouse gas is water vapor. It contributes to around half of the planet's warming. It absorbs heat that is projected upward from the earth while letting practically all sunlight reach the planet's surface like other greenhouse gases do.

To learn more about water vapor please visit -
brainly.com/question/20899075
#SPJ4

6 0
2 years ago
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