2 years ago

Classify the following as elements, compounds and mixtures

Chemistry

1 answer:

9966 [12]2 years ago

7 0

Answer:

Elements

Gold, copper

Compounds

Sodium chloride, Sulphur dioxide, Aluminium oxide,

Mixture

Brass, rainwater, distilled water, sugar solution,muddy water

Explanation:

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Answer:

57.6g

Explanation:

So, if in one mole of water, 16 g of oxygen atom is present. Then, in 3.6 moles of water, the mass of oxygen present will be 3.6×16=57.6g. Therefore, the amount of oxygen present in 3.6 g water is option (B)- 57.6 g.

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Which element are in the compound CoCI2?<br><br> Choose all correct answers.

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Answer:

the answer is cobalt and chloride

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Which of the following is an element? A. carbon monoxide gas (CO) B. magnesium chloride salt (MgCl) C. zinc metal (Zn) D. hydroc

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The answer is C) zinc (Zn)

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3 years ago

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Which missing item would complete this beta decay reaction?<br> PLATO

goldfiish [28.3K]

Answer: $_{-1}^0\beta$

Explanation:

General representation of an element is given as: $_Z^A\textrm{X}$

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

Beta decay : In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.

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

The given reaction would be represented as:

$_{43}^{98}\textrm{Tc}\rightarrow_{44}^{98}\textrm{Pb}+_{-1}^0\beta$

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