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olga nikolaevna [1]
3 years ago
8

A centrifuge was used to separate a sample into its components. What conclusion about the sample can be formed based on the tech

nique used? It was a pure substance. It was a compound. It was a heterogeneous mixture. It was a homogeneous mixture
Chemistry
2 answers:
Komok [63]3 years ago
8 0

Its Homogenous Centrifuges are used to speed up the process of separating Homogeneous mixtures.

tatiyna3 years ago
3 0

Answer is: It was a homogeneous mixture.

For example, a centrifuge is used to separate components from blood.

This technique is also used for heterogeneous mixtures.

Centrifugation is a technique using centrifugal force to separate particles from a mixture according to their size, shape and density.

The principle is that the denser particles are forced to the bottom and the lighter particles stay at the top.

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calcium reacts with fluorine to produce calcium fluoride. how does oxidation and reduction take place in this reaction?
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The oxidation is occurring on Calcium ions as it release one electron and reduction will be occurring on fluorine ion as it accepts one electron.

<u>Explanation:</u>

An element will undergo oxidation and form a positive ion on releasing one or more electrons from its valence shell. While reduction is occurred in a chemical reaction, then the element will be forming a negative ion with the acceptance of one or more electrons in its valence shell.

So in the given process of calcium fluoride, the one electron from the valence shell of calcium will be released making it as c a^{+} ions and this is termed as oxidation process. This one electron will be getting accepted by the fluorine ion and thus it will convert to F^{-} ions. This process of acceptance of electrons is termed as reduction.

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3 years ago
A breeder nuclear reactor is a reactor in which nonfissile U-238 is converted into fissile Pu-239. The process involves bombardm
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<u>Answer:</u> The nuclear equations for the given process is written below.

<u>Explanation:</u>

The chemical equation for the bombardment of neutron to U-238 isotope follows:

_{92}^{238}\textrm{U}+n\rightarrow _{92}^{239}\textrm{U}

Beta decay is defined as the process in which neutrons get converted into an electron and a proton. The released electron is known as the beta particle.

_Z^A\textrm{X}\rightarrow _{Z+1}^A\textrm{Y}+_{-1}^0\beta

The chemical equation for the first beta decay process of _{92}^{239}\textrm{U} follows:

_{92}^{239}\textrm{U}\rightarrow _{93}^{239}\textrm{Np}+_{-1}^0\beta

The chemical equation for the second beta decay process of _{93}^{239}\textrm{Np} follows:

_{93}^{239}\textrm{Np}\rightarrow _{94}^{239}\textrm{Pu}+_{-1}^0\beta

Hence, the nuclear equations for the given process is written above.

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