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3 years ago

The order of components in a typical flame atomic absorption spectrometer is

1 answer:

4 0

The order of components in a typical flame atomic absorption spectrometer is hollow cathode lamp--flame--monochromator--detector

<u>Explanation:</u>

The hollow cathode lamp practices a cathode created of the element of interest with a low internal pressure of inert gas.
Remove scattered light of other wavelengths from the flame. AAS flame includes aiming at first the fuel than the oxidant and then lighting the flame with the instrument's auto-ignition system. Applying flame Ddtroy any analyte ions and breakdown complexes.
The process of the monochromator is to divide analytical lines photons moving through the flame
Photomultiplier tube (PMT) as the detector the PMT determines the intensity of photons of the analytical line exiting the monochromator.

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Plants or animals with desirable characterstics are bred together to create improved varieties. What is this process called?

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cross breeding or selective breeding its common with dogs

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3 years ago

Come up with a definition for density

Fantom [35]

Density measures how tightly packed particles are.

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3 years ago

Read 2 more answers

If the ka of a monoprotic weak acid is 5.4 × 10-6, what is the ph of a 0.14 m solution of this acid?

Aleks [24]

pH = 2.1

Let $HA (aq)$ resembles the acid; as a weak acid (a small value of $K_{a}$ ) $HA$ would partially dissociate to produce protons $H^{+}$ and $A^{-}$ , its conjugate base. Let the final proton concentration (i.e., $[H^{+}]$ ) be $x$ . (Apparently $x \ge 0$ ) Construct the following RICE table:

$\left\begin{array}{cccccc}\text{R}&HA(aq)&\rightleftharpoons&H^{+}(aq) &+ &A^{-}(aq)\\\text{I} & 0.14 \; \text{M} & &\\\text{C}&-x \; \text{M}& &+x \; \text{M} & & +x \; \text{M}\\E & (0.14 - x)\; \text{M} & & x \; \text{M} & &\+x \; \text{M}\end{array}\right$

By definition, (all concentrations are under equilibrium condition)

$\left\begin{array}{ccc}K_{a}&=&[H^{+}] \cdot [A^{-}] / [HA]\\&=&x^{2} /(0.14 - x)\end{array}\right$

It is given that

$K_a = 5.4 \cdot 10^{-6}$

Equating and simplifying the two expressions gives a quadratic equation; solve the equation for $x$ gives:

$x^2 = 5.4 \cdot 10^{-6} \cdot (14 - x) \\x^2 + 5.4 \cdot 10^{-6} \cdot 14 \cdot x - 5.4 \cdot 10^{-6} \cdot 14 = 0 \\x = 0.0087 \; \text{M} \; (x \ge 0)$

The pH of a solutions equals the opposite of the logarithm of its proton concentration to base 10; thus for this particular solution

$\text{pH} = -\text{ln(}[H^{+}]\text{)} / \text{ln(}10\text{)} = 2.1$

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4 years ago

Oxygen has an atomic number of 8. What is the approximate atomic mass of an oxygen atom in daltons (Da)?

otez555 [7]

Answer : The approximate atomic mass of an oxygen atom daltons (Da) is, 16 Da

Explanation :

As we know that dalton (Da) is equal to atomic mass unit (amu).

As we are given that,

Element = oxygen

Atomic number of oxygen = 8

As we know that the atomic mass of oxygen = 16 amu

So, the approximate atomic mass of an oxygen atom in daltons (Da) = Atomic mass unit of oxygen = 16 amu = 16 Da

Thus, the approximate atomic mass of an oxygen atom daltons (Da) is, 16 Da

8 0

3 years ago