Measurement, Mass & Equations (AQA GCSE Chemistry Combined Science): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does the law of conservation of mass state about chemical reactions?
What does the law of conservation of mass state about chemical reactions?
Mass of reactants = mass of products
Why is mass conserved during chemical reactions?
Why is mass conserved during chemical reactions?
Atoms are rearranged, not created/destroyed
What does a 'balanced' chemical equation show?
What does a 'balanced' chemical equation show?
Same no. of each atom on both sides
What are the numbers in front of formulas in chemical equations called?
What are the numbers in front of formulas in chemical equations called?
Coefficients
What is the first step in balancing a chemical equation?
What is the first step in balancing a chemical equation?
Write the unbalanced equation
In unbalanced , how many N atoms are on the left side?
In unbalanced , how many N atoms are on the left side?
2
What is the balanced equation for ?
What is the balanced equation for ?
In , how many H atoms are on the right side?
In , how many H atoms are on the right side?
6
What should you do after adjusting coefficients in an equation?
What should you do after adjusting coefficients in an equation?
Check your work by counting atoms again
What is relative formula mass ()?
What is relative formula mass ()?
Total mass of all atoms in a compound
How is relative formula mass () calculated?
How is relative formula mass () calculated?
Add up of all elements in compound
In a balanced equation, what is true about formula masses?
In a balanced equation, what is true about formula masses?
Sum of of reactants = sum of products