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to allow oxygen to enter the crucible and react with X

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The simplest whole number ratio of atoms of each element present in a compound.

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Because X is a reactive metal.

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Lead (II) oxide

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teacher what is interpret the chemical equation?

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teacher what is interpret the chemical equation?

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4 Fe + 3 O2 --> 2 Fe2O3

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formula that shows the simplest whole number ratio of atom of each element present in a compound

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Give two information that can be interpreted from the chemical equation  4Al+3O2>2Al2O3

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Give two information that can be interpreted from the chemical equation  4Al+3O2>2Al2O3

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1. Not a balanced equation
2. Decomposition reaction

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What is the meaning of empirical formula?

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What is the meaning of empirical formula?

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Empirical formula is a chemical formula that shows a simplest whole number ratio of atom of each element in a compound

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Interpret the chemical equation qualitatively and quantitatively

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Interpret the chemical equation qualitatively and quantitatively

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4 mols of Iron solid reacts with 3 mols of Oxygen gas to produce 2 mol of Iron Oxide solid

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No. Copper does not react easily with oxygen

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When carrying out an experiment,why does the crucible lid need to be opened once a while.

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When carrying out an experiment,why does the crucible lid need to be opened once a while.

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To allow oxygen from the air to react with magnesium

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hydrogen gas is passed through the boiling tube after heating has stopped is a step to prevent hot metal T react with oxygen to form metal oxide.

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A chemical formula that shows the simplest whole number ratio of atoms of each element present in a compound

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Based on the results calculate the mass of:

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Based on the results calculate the mass of:

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Magnesium:2.4g
Oxygen:1.6g

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what is the meaning of molecular formula?

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what is the meaning of molecular formula?

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a chemical formula that shows the actual number of atoms of each element in each molecule of a compound.

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Write a chemical equation for the reaction between oxide of copper and hydrogen gas

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Write a chemical equation for the reaction between oxide of copper and hydrogen gas

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CuO+H2>Cu+H2O

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This method can only determine the empirical formula of reactive metal oxide but lead (ii) oxide is a less reactive metal. lead is less reactive towards oxygen

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Can the empirical formula of lead (ii) oxide be determined by using this method?

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Can the empirical formula of lead (ii) oxide be determined by using this method?

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No

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to make sure that the oxygen has been removed

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Heating, cooling and weighing process is repeating until a constant mass is obtained

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amount of substance that contains as many particle as the number of atoms in exactly 12 gram of carbon gram

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The simplest whole number ratio of atoms of each element present in a compound.

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metal T IS 8g and oxygen is 2g

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im not sure
lead (II) oxide
or
aluminium (II) oxide

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don mind!

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Finally got to upload the correct ans :)

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heating,cooling and weighing process is repeated until a constant mass is obtained.

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heating,cooling and weighing process is repeated until a constant mass is obtained.

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4 mols of aluminium reacts with 3 mols oxygen to produce 2 mols of aluminium oxide.

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Ion

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heating,cooling and weighing is repeated until a constant mass is obtained

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magnesium is more reactive than hydrogen

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Mg= 46.4 - 44.0
= 2.4g
NOM= 2.4/24
= 0.1 mol

O= 48.0 - 46.4
= 1.6g
NOM= 1.6/16
= 0.1 mol

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Calculate the mass of copper and mass of oxygen that has reacted 

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Calculate the mass of copper and mass of oxygen that has reacted 

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Mass of copper : 6.4g
Mass of oxygen : 0.8g

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State the name of the gas released when hydrochloric acid reacts with zinc powder

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State the name of the gas released when hydrochloric acid reacts with zinc powder

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Hydrogen gas

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To remove all the air in the combustion tube.

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A chemical formula that shows the simplest whole number ratio of atoms in each element of a compound

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A chemical formula that shows the simplest whole number ratio of atoms in each element of a compound

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a chemical formula that shows the simplest whole number ratio of atoms of each element in a compound.

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a chemical formula that shows the simplest whole number ratio of atoms of each element in a compound.

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reducing agent

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Lead (ii) oxide

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-lead(II)oxide
-copper(II)oxide

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Magnesium is more reactive than hydrogen