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Chemistry

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In the flowing equitation 2H2+O2→2H2O how many grams of oxygen are needed to make 9g of water?

2H₂+O₂->2H₂OThe best way to answer any mass balancing questions like this is to set the information in a table as follows and fill in the blanks: 2H₂+ O

Answered by Caroline O. • Chemistry tutor

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Describe how elements are arranged in the periodic table

Elements in the periodic table are arranged in order of increasing atomic (proton) number. Elements with the same number of electron shells are arranged in the horizontal rows (periods), and elements with...

Answered by Georgia C. • Chemistry tutor

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On the reaction profile below, label the activation energy and the energy given out ((delta)H) - 2 marks

1 mark for each correct label

Answered by Mike S. • Chemistry tutor

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Balance the following equation for the formation of magnesium chloride: Mg + HCl --> MgCl2 + H

Mg + 2HCl --> MgCl2 + H2
There are two chlorines in magnesium chloride so you put a two in front of the hydrochloric acid. This means that you need to put a 2 aft...

Answered by Helen G. • Chemistry tutor

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What is Ionic bonding?

Ionic bonding is bonding between a metal and a non-metal. This happens due to a transferal of electrons. For example a metal from group 2 such as Magnesium bonding to a non-metal from gro...

Answered by Bobby B. • Chemistry tutor

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