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vampirchik [111]
3 years ago
12

Which all separation method is used in medical field

Chemistry
1 answer:
Anvisha [2.4K]3 years ago
3 0

Answer:

chromatography

Explanation:

this method of separation is used to identify harmful toxins in some medicines

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At a certain concentration of H2 and I2, the initial rate of reaction is 4.0 x 104 M / s. What would the initial rate of the rea
andreev551 [17]

The question is incomplete, here is the complete question:

The rate of certain reaction is given by the following rate law:

rate=k[H_2]^2[I_2]^2

At a certain concentration of H_2 and I_2, the initial rate of reaction is 4.0 × 10⁴ M/s. What would the initial rate of the reaction be if the concentration of

Answer : The initial rate of the reaction will be, 1.0\times 10^4M/s  

Explanation :

Rate law expression for the reaction:

rate=k[H_2]^2[I_2]^2

As we are given that:

Initial rate = 4.0 × 10⁴ M/s

Expression for rate law for first observation:

4.0\times 10^4=k[H_2]^2[I_2]^2 ....(1)

Expression for rate law for second observation:

R=k(\frac{[H_2]}{2})^2[I_2]^2 ....(2)

Dividing 2 by 1, we get:

\frac{R}{4.0\times 10^4}=\frac{k(\frac{[H_2]}{2})^2[I_2]^2}{k[H_2]^2[I_2]^2}

\frac{R}{4.0\times 10^4}=\frac{1}{4}

R=1.0\times 10^4M/s

Therefore, the initial rate of the reaction will be, 1.0\times 10^4M/s

4 0
3 years ago
How many molecules are in 3.5 moles of hydrogen
jek_recluse [69]

Answer:3.5 moles * 6.02 X 10^23 particles/mole * 2 H atoms/particle of H2 = 42.14 X 10^^23 atoms

Explanation:

7 0
2 years ago
Chemical A and Chemical B react in an exothermic reaction. What can be known about what will happen when Chemical A and Chemical
Fynjy0 [20]
In exothermic reactions, there is a release heat and the replacement of weak bonds with stronger ones.
8 0
3 years ago
7) What is the hydrogen concentration of a solution with a pH of 2.1? *
lesya [120]

Answer:

Hydrogen concentration = 7.94×10^-3 M

Explanation:

from potenz Hydrogen ( pH ) definition

pH = -log[H+]

2.1 = -log[H+]

2.1/-log = -log[H+]/-log

10^-2.1 = [H+]

[H+] = 7.94×10^-3M

8 0
4 years ago
Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures. CH4 (g) + H2 O(g) ⇌ 3H2 (
Damm [24]

Answer:

6.28

Explanation:

Let's consider the following reaction at equilibrium.

CH₄(g) + H₂O(g) ⇌ 3 H₂(g) + CO(g)

The concentration equilibrium constant (Kc) is the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients.

Kc = [H₂]³ × [CO] / [CH₄] × [H₂O]

Kc = 1.15³ × 0.126 / 0.126 × 0.242

Kc = 6.28

8 0
3 years ago
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