This question is about elements in Group 2.
A teacher burns magnesium in oxygen, O2.
Complete the word equation for the reaction.
magnesium + oxygen ⟶ ___________________
Balance the equation for the reaction between magnesium and oxygen.
The teacher reacts calcium with water.
Ca + 2H2O → Ca(OH)2 + H2
How many moles of reactant and product are there in this reaction?
Moles of reactant = __________
Moles of product = __________
According to the symbol equation, how many calcium atoms are present at the start of this reaction?
Tick (✓) one box.
6.02 x 10–23 | |
6.23 x 10–23 | |
6.02 x 1023 |
According to the symbol equation, how many hydrogen atoms are present in the hydrogen gas produced during this reaction?
Tick (✓) one box.
6.02 x 10–23 | |
6.02 x 1023 | |
1.20 x 1024 | |
1.20 x 10–24 |
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