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3 contributions to Chemistry for HomeSchoolers
18d •
Chemistry Practice: Ionic Compounds, Sig Figs & Conversion Factors
🦋 PART 1: Ionic Compounds (Questions 1–8) 1. Write the chemical formula for sodium chloride. 2. Write the chemical formula for calcium fluoride. 3. Name the ionic compound K₂O. 4. Name the ionic compound MgBr₂. 5. Write the formula for aluminum oxide. 6. Write the name of FeCl₃.(Hint: iron has more than one possible charge.) 7. Write the formula for copper(II) sulfate. 8. Which compound is written correctly?a) Na₂Clb) CaCl₂c) AlO₃d) Mg₂O 🦋 PART 2: Significant Figures (Questions 9–14) 9. How many significant figures are in 0.00450? 10. How many significant figures are in 120.0? 11. Round 3.45678 g to 3 significant figures. 12. Round 0.009876 km to 2 significant figures. 13. Calculate and report the answer with the correct number of significant figures: 2.5×4.322.5 \times 4.322.5×4.32 14. Calculate and report the answer with the correct number of significant figures: 12.4+3.16+0.812.4 + 3.16 + 0.812.4+3.16+0.8 🦋 PART 3: Conversion Factors (Questions 15–20) 15. Convert 250 cm to meters. 16. Convert 3.5 km to meters. 17. Convert 45 grams to milligrams. 18. Convert 0.75 liters to milliliters. 19. A solution has a volume of 125 mL. Convert this volume to liters. 20. A patient weighs 68.0 kg. Convert this mass to grams, using correct significant figures. show your work and see you soon!! 🦋☀️✨
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1 like • 18d
PART 1: 1. NaCl 2. CaF2 3. Potassium Oxide 4. Magnesium Bromide 5. Al2O3 6. Ferric Chloride 7. CuSO4 8. b) is the only compatible one with oxidation numbers PART 2 9. Three 10. Four 11. 3.46 12. 0.0099 13. If you mean (2.5x4.3225) divided by (4.32x4.3225) it's equal to 0.58 If you mean (2.5x4.3225) times (4.32x4.3225) then it's equal to 201.8 or 202 approximated to only 3 significant figures 14. 24.3 PART 3 15. 2.5 m 16. 3500 m 17. 45,000 mg 18. 750 ml 19. 0.125 l 20. 68,000 g (with an uncertainty of plus or minus 100 g.)
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1 like • 18d
@Lauren Davis I’m sorry Lauren, I think I’ll be unable to attend the call tonight, sorry for warning you so late, but I’m happy to share my answers in Italian (those that are translatable). 3. Ossido di Potassio (both traditional and IUPAC nomenclature) 4. Bromuro di Magnesio (Traditional nomenclature) and Dibromuro di Magnesio (IUPAC nomenclature). The prefix “di”; meaning “two” is given in the IUPAC nomenclature, while in the traditional nomenclature it is not used since Magnesium and Bromine just have one number of oxidation (respectively +2 and -1) and that is the only compound that they can form alone. 6. Cloruro Ferrico (traditional nomenclature) and Tricloruro di Ferro (III) (IUPAC nomenclature)
18d •
✨🦋 WILL YOU BE THERE!?! 🦋✨
totally get if you already studied for it - tomorrow at 8 am I will be releasing the questions and the review will be the answers in the Q&A. Time commitment : (12:00pm - 13:00pm ) 1 hour - EST TIME ZONE!!! so if you live in New York City or Florida, we are starting at noon ~~~🦋✨ WHERE @ FREAKING HERE BRO PLS COME or ill just work on my IV business anyways, lets talk chem concepts or anything you care about it and ill tell you what little knowledge i know about it!!! love, your chem tutor
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1 like • 18d
What time zone @Lauren Davis ?
Dec '25 •
✨ 🦋 Welcome to Chemistry Tutoring 🦋 ✨
This is a space for students who are learning chemistry and engaging with other students who are understand the grind of a STEM class -- and how much studying and persistence chemistry takes!! Please feel free to ask any questions or explanation of concepts as you move through the modules! Good luck and you are so smart! YOU' VE GOT THIS!! 😁
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1 like • 20d
Hi, thanks for letting me in the community, I’m Luigi, 17 year old student who really likes chemistry. I’ve studied inorganic chemistry and now I’m studying organic chemistry. I’m here both to learn and to help making chemistry knowledge easier if needed. Very happy to be in this community.
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1 like • 19d
@Lauren Davis Thanks for teaching me a new English expression haha, never heard of the oyster one. I like how the human body functions and one dream would be to become a doctor and travel to poor countries to help people whose government can’t afford them proper healthcare.
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@luigi-passerini-4097
17 Y.O. XC, track, mountain and road middle distance runner
Active 6h ago
Joined Jan 24, 2026