AQA GCSE Chemistry equations and formulas already rated A+
6 views 0 purchase
Course
AQA GCSE Chemistry equations and formulas already
Institution
AQA GCSE Chemistry Equations And Formulas Already
AQA GCSE Chemistry equations and formulas already rated A+
1. How do you calculate the number of neutrons in an atom?
Answer: You can calculate the number of neutrons by subtracting the atomic number from the mass
number.
2. What is the relationship between atomic number and number of elect...
AQA GCSE Chemistry equations and formulas already rated A+
1. How do you calculate the number of neutrons in an atom?
Answer: You can calculate the number of neutrons by subtracting the atomic number from the mass
number.
2. What is the relationship between atomic number and number of electrons?
Answer: The atomic number is equal to the number of electrons in an atom.
3. How do you calculate relative atomic mass?
Answer: Relative atomic mass is calculated by summing up the product of the mass number and
abundance of each isotope, then dividing by 100.
4. What is relative formula mass, and how is it used?
Answer: Relative formula mass is used to calculate the total mass of a compound based on the relative
atomic masses of its elements.
5. How do you calculate the number of moles of a substance?
Answer: You can calculate the number of moles by dividing the mass of the substance in grams by its
atomic mass (in grams per mole).
6. What is percentage yield, and how is it calculated?
Answer: Percentage yield is calculated by dividing the actual mass of product produced by the maximum
theoretical mass possible, then multiplying by 100.
, 7. What is percentage atom economy, and how is it calculated?
Answer: Percentage atom economy is calculated by dividing the molecular weight of the desired product
by the sum of the molecular weights of the reactants, then multiplying by 100.
8. How do you express concentration in g/dm³?
Answer: Concentration can be expressed in g/dm³ by dividing the amount of solute in grams by the
volume of solution in deciliters, or converting to cubic centimeters first.
9. How do you calculate the number of moles of gas?
Answer: You can calculate the number of moles of gas by dividing its volume in deciliters or cubic
centimeters by 24 or 24,000, respectively.
10. Write a word equation for a reaction between magnesium and copper(II) sulfate.
Answer: The word equation is "magnesium + copper(II) sulfate → magnesium sulfate + copper".
11. Write a symbol equation for a reaction between magnesium and copper(II) sulfate.
Answer: The symbol equation is "Mg(s) + CuSO₄(aq) → MgSO₄(aq) + Cu(s)".
12. Write an ionic equation for a reaction between magnesium and copper(II) sulfate.
Answer: The ionic equation is "Mg(s) + Cu²⁺(aq) → Mg²⁺(aq) + Cu(s)".
13. Write a word equation for a reaction between zinc and lead nitrate.
Answer: The word equation is "zinc + lead nitrate → zinc nitrate + lead".
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller bestscores1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.35. You're not tied to anything after your purchase.
