Answer: made up of an infinite number of indestructible atoms in unpredictable motion.
Answer:
Explanation:
The<em> mole fraction</em> of a component in a mixture is the number of moles of the component divided by the total number of moles of all the components, multiplied by 100.
The symbol X is used to represent the mole fraction.
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<u>1. Convert masses in grams to number of moles</u>
Formula:
- number of moles = mass in grams / molar mass
a) Lithium bromide
- Chemical Formula: LiBr
- Molar mass: 86.845 g/mol
b) Water
c) Total number of moles = 2.00 mol + 20.0 mol = 22.0 mol
<u>2. Mole fraction of lithium bromide</u>
Answer:
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Answer:
Germanium
Explanation:
The element Germanium is one with a relative molecular mass of 72. This corresponds to the mass number of this element.
Relative molecular mass of an element is the mass of a formula unit to that of a carbon-12 atom.
The chemical symbol of Germanium is Ge. It is a lustrous and hard metalloid belonging to the carbon group.
It was discovered by Clemens Alexander Winkler.
Answer:
a) In the presence of light silver nitrate decompose to form silver. hence to prevent the decomposition it is kept in dark coloured bottles.
b) Molybdenum is used in the manufacture of ammonium because molybdenum acts as a promoter which increases the efficiency of the catalyst Iron, resulting in better yield of ammonia.
c) When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.
