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4 years ago

If 2.29 kg of hydrazine are used in a rocket engine and 3.14 kg of oxygen are available for reaction,

Chemistry

1 answer:

Valentin [98]4 years ago

7 0

Answer:

Explanation:

Reaction of hydrazine is

N2H4 + O2 --> N2 + 2H2O

Mass of hydrazine mole = 14x2 + 1x4 = 32g/Mol

Mass of O2 mole = 16x2 = 32g/Mol

Number of moles in 2.29kg of hydrazine

2290/32=71.56Moles

1mol of hydrazine required to react with 1mol of O2

Amount of O2 required to react with hydrazine

71.56*32=2290

Required O2 amount is exactly the same.

Therefore limiting reactant is hydrazine and excess of 850g of O2 will be in excess.

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A certain second-order reaction (B→products) has a rate constant of 1.30×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 224 s

soldier1979 [14.2K]

Answer:

$\large\boxed{\large\boxed{0.291M}}$

Explanation:

By definition one half-life is the time to reduce the initial concentration to half.

For a second order reaction the rate law equations are:

$\dfrac{d[B]}{dt}=-k[B]^2$

$\dfrac{1}{[B]}=\dfrac{1}{[B]_0}+kt$

The half-life equation is:

$t_{1/2}=\dfrac{1}{k[A]_0}$

Thus, substitute the rate constant $1.30\times 10^{-3}M^{-1}\cdot s^{-1}$ and the half-life time 224s to find [A]₀:

$224s=\dfrac{1}{1.30\times10^{-3}M^{-1}\cdot s^{-1}[A]_0}$

$[A]_o=0.291M$

7 0

4 years ago

Write the balanced chemical equations for the complete combustion of acetic acid (ch3cooh), the main active ingredient in vinega

pantera1 [17]

A combustion reaction usually happens when a hydrocarbon is reacted with an oxygen molecule producing water and carbon dioxide. It is an exothermic reaction which means it releases heat as the process proceeds. It is a spontaneous process where it readily happens without any supply of energy. The total kinetic energy of the reactants is greater than the activation energy that is why heat is being released. Acetic acid is a carboxylic acid and is classified as a hydrocarbon so when reacted with oxygen, it would yield carbon dioxide and water. The balanced chemical reaction would be as follows

CH3COOH + 2 O2 = 2 CO2 +2 H2O

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4 years ago

Which salt is produced when NH4OH reacts with HNO3? KNO2 NaNO3 NH4NO3 NH4NO2

xenn [34]

Answer:

NH4NO3 is the answer

Explanation:

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4 0

3 years ago

Read 2 more answers

Match the element with number of valence electrons

Alla [95]

Answer:

Oxygen-O = 6

Carbon C = 4

Gallium G = 3

Astatine A = 7

Arsenic As = 5

Potassium K = 1

Hydrogen H = 1

Helium H = 2

Explanation:

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2 years ago

PLZZZ HELP FASSSSSSSSSSSSTTTTTTTTTTTTT

aleksandrvk [35]

Answer:

i think multipling 30 to the 40

30 × 40 = 1200ppt

7 0

3 years ago