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3 years ago

Which of the following is an essential condition for a combustion reaction ?

Chemistry

2 answers:

Ugo [173]3 years ago

8 0

B is the answer to your question

WARRIOR [948]3 years ago

6 0

Answer: Option (b) is the correct answer.

Explanation:

A combustion reaction is defined as the reaction in which a substance chemically reacts in the presence of oxygen.

A combustion reaction is always exothermic in nature as heat is released. Also, carbon dioxide and water will be produced in a combustion reaction.

For example, $CH_{4} + 2O_{2} \rightarrow CO_{2} + 2H_{2}O$

Therefore, we can conclude that an essential condition for a combustion reaction is that oxygen is a reactant.

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Consider a solution that is 1.3×10−2 M in Ba2+ and 2.0×10−2 M in Ca2+. Ksp(BaSO4)=1.07×10−10 Ksp(CaSO4)=7.10×10−5 If sodium sulf

skad [1K]

Answer:

Explanation:

Ksp(BaSO4)=1.07×10−10

BaSO₄ → Ba²⁺ + SO₄²⁻

1.07×10⁻¹⁰ = ( Ba²⁺) × ( SO₄²⁻)

but Ba²⁺ = 1.3×10⁻² M

1.07×10⁻¹⁰ = 1.3×10⁻² M × ( SO₄²⁻)

( SO₄²⁻) = 1.07×10⁻¹⁰ / 1.3×10⁻² = 0.823 × 10⁻⁸ M

while Ksp(CaSO4)=7.10×10−5

CaSO₄ → Ca²⁺ + SO₄²⁻

7.10×10⁻⁵ = 2.0×10⁻² × ( SO₄²⁻)

( SO₄²⁻) = 7.10×10⁻⁵ / 2.0×10⁻² = 3.55 × 10⁻³ M

comparing the concentration of sulfate ions, Ba²⁺ cation will precipitate first because the Ba²⁺ requires 0.823 × 10⁻⁸ M sodium sulfate which less compared the about needed by CaSO₄

7 0

3 years ago

Estimate the air pressure at an altitude of 5km

r-ruslan [8.4K]

The answer is 100 kg

6 0

3 years ago

Which structural feature will differ among an ester, an alcohol, and an aldehyde, regardless of which examples are being compare

AlekseyPX

Answer:

The functional group

Explanation:

A functional group defines a hydrocarbon. an ester the functional group is an O- alkyl group while that one of an alcohol is -OH group. An aldehyde is a functional group on its own.

7 0

3 years ago

Read 2 more answers

The density of ethanol is 0.789 g/cm^3 at 20 degrees C. What volume of ethanol has a mass of 15.5 grams?

lys-0071 [83]

<span>density = mass / volume

given the quotient , we have density and mass, volume can be easily calculated as:

volume = mass / p =15.5 g / 0.789 g/cm^3

=~ 20 cm^3 (dimension ally constant)</span>

6 0

3 years ago

As you go down group one of the periodic table, the reactions become and more

Lady bird [3.3K]

Answer:

vigorous

Explanation:

As you go down group one of the periodic table, the reactions become and more vigorous.

3 0

2 years ago