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dsp73
3 years ago
9

Prediction for Scandium (II) and Cl

Chemistry
1 answer:
SCORPION-xisa [38]3 years ago
3 0

Answer:

(a) Eka-aluminum and gallium are two names of the same element as Eka-Aluminium has almost exactly the same properties as the actual properties of the gallium element. The properties: atomic mass, density, melting point, formula of chloride and formula of oxide are almost the same.

Explanation:

Scandium - Eka boron.

      (ii) Gallium - Eka aluminium.

      (iii) Germanium - Eka silicon.

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(*Anohter one* For my friends!!! ^^)
Sliva [168]

Answer:

Thx Have a Fantastic day :)

Explanation:

7 0
3 years ago
Read 2 more answers
Enthalpy of combustion of ethyl alcohol, C2 H5 OH, is – 950 kJ mol–1. How much heat is evolved when one gram of ethyl alcohol bu
melomori [17]
<h3>Answer:</h3>

20.62 Kilo-joules

<h3>Explanation:</h3>
  • The Enthalpy of combustion of ethyl alcohol is -950 kJ/mol.
  • This means that 1 mole of ethyl alcohol evolves a quantity of heat of 950 Joules when burned.

Molar mass of ethyl ethanol = 46.08 g/mol

Therefore;

46.08 g of  C₂H₅OH evolves heat equivalent to 950 kilojoules

We can calculate the amount of heat evolved by 1 g of C₂H₅OH

Heat evolved by 1 g of C₂H₅OH  = Molar enthalpy of combustion ÷ Molar mass

                                      = 950 kJ/mol ÷ 46.08 g/mol

                                      = 20.62 Kj/g

Therefore, a gram of C₂H₅OH  will evolve 20.62 kilo-joules of heat

7 0
3 years ago
What is the difference between a stable and unstable isotope
USPshnik [31]

Stable isotopes are not radioactive nor dangerous.

Unstable isostopes are radioactive and have different mass of the element.

8 0
3 years ago
What form of matter is made from only one type of atom? compound molecule material element
Lelechka [254]
<span>Elements are matter made of one kind of atom.</span>
6 0
2 years ago
Read 2 more answers
Mantle convection is a process of that creates circular currents in the asthenosphere. As a result, the plates slowly move.
LUCKY_DIMON [66]

Answer:

<em>Rigid plates that move around Earth's surface is called tectonic plates. </em>

Explanation:

Lithosphere is rigid and relatively cold and is the outer surface of the planet. The convective motions of maintenance break the lithosphere into plates.

This place that a form can move in any direction, can move towards each other, can move away and push each other which is the reason for formation of mountains for shifting of continents for making of ocean basin.  

8 0
3 years ago
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