What are the 5+ exercise types xem bóng đá trực tiếp nhà cái balancing Chemical equations and solving methods? What is the duration xem bóng đá trực tiếp nhà cái 8th-grade Natural Science in Vietnam?
What are the 5+ exercisetypes xem bóng đá trực tiếp nhà cái balancing Chemical equations and solving methods?
Type 1: Complete and Balance Chemical Equations
| Exercises: MgCl2 + KOH → Mg(OH)2 + KCl Cu(OH)2 + HCl → CuCl2 + H2O Cu(OH)2 + H2SO4 → CuSO4 + H2O FeO + HCl → FeCl2 + H2O Fe2O3 + H2SO4 → Fe2(SO4)3 + H2O Cu(NO3)2 + NaOH → Cu(OH)2 + NaNO3 P + O2 → P2O5 N2 + O2 → NO NO + O2 → NO2 NO2 + O2 + H2O → HNO3 Na2O + H2O → NaOH Ca(OH)2 + Na2CO3 → CaCO3 + NaOH Fe2O3 + H2 → Fe + H2O Mg(OH)2 + HCl → MgCl2 + H2O FeI3 → FeI2 + I2 AgNO3 + K3PO4 → Ag3PO4 + KNO3 SO2 + Ba(OH)2 → BaSO3 + H2O Ag + Cl2 → AgCl FeS + HCl → FeCl2 + H2S Pb(OH)2 + HNO3 → Pb(NO3)2 + H2O Solutions: MgCl2 + 2KOH → Mg(OH)2 + 2KCl Cu(OH)2 + 2HCl → CuCl2 + 2H2O Cu(OH)2 + H2SO4 → CuSO4 + 2H2O FeO + 2HCl → FeCl2 + H2O Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O Cu(NO3)2 + 2NaOH → Cu(OH)2 + 2NaNO3 4P + 5O2 → 2P2O5 N2 + O2 → 2NO 2NO + O2 → 2NO2 4NO2 + O2 + 2H2O → 4HNO3 Na2O + H2O → 2NaOH Ca(OH)2 + Na2CO3 → CaCO3 + 2NaOH Fe2O3 + 3H2 → 2Fe + 3H2O Mg(OH)2 + 2HCl → MgCl2 + 2H2O 2FeI3 → 2FeI2 + I2 3AgNO3 + K3PO4 → Ag3PO4 + 3KNO3 SO2 + Ba(OH)2 → BaSO3 + H2O 2Ag + Cl2 → 2AgCl FeS + 2HCl → FeCl2 + H2S Pb(OH)2 + 2HNO3 → Pb(NO3)2 + 2H2O |
Type 2: Identify Appropriate Coefficients to Balance Equations
| Exercises: Al2O3 + ? → ?AlCl3 + ?H2O H3PO4 + ?KOH → K3PO4 + ? ?NaOH + CO2 → Na2CO3 + ? Mg + ?HCl → ? + ?H2 ? H2 + O2 → ? P2O5 + ? → ?H3PO4 CaO + ?HCl → CaCl2 + H2O CuSO4 + BaCl2 → BaSO4 + ? Solutions: Al2O3 + 6HCl → 2AlCl3 + 3H2O H3PO4 + 3KOH → K3PO4 + 3H2O 2NaOH + CO2 → Na2CO3 + H2O Mg + 2HCl → MgCl2 + H2 2H2 + O2 → 2H2O P2O5 + 3H2O → 2H3PO4 CaO + 2HCl → CaCl2 + H2O CuSO4 + BaCl2 → BaSO4 + CuCl2 |
Type 3: Atomic Schemas Established and Mole Ratio of Substances Post-Reaction
| Exercises: a) Na + O2 → Na2O b) P2O5 + H2O → H3PO4 c) HgO → Hg + O2 d) Fe(OH)3 → Fe2O3 + H2O Solutions: a) 4Na + O2 → 2Na2O Ratio: Na atoms : O2 molecules : Na2O molecules = 4 : 1 : 2 b) P2O5 + 3H2O → 2H3PO4 Ratio: P2O5 molecules : H2O molecules : H3PO4 molecules = 1 : 3 : 2 c) 2HgO → 2Hg + O2 Ratio: HgO molecules : Hg atoms : O2 molecules = 2 : 2 : 1 d) 2Fe(OH)3 → Fe2O3 + 3H2O Ratio: Fe(OH)3 molecules : Fe2O3 molecules : H2O molecules = 2 : 1 : 3 |
Type 4: Balancing Equations with Organic Compounds
| Exercises: CnH2n + O2 → CO2 + H2O CnH2n + 2 + O2 → CO2 + H2O CnH2n - 2 + O2 → CO2 + H2O CnH2n - 6 + O2 → CO2 + H2O CnH2n + 2O + O2 → CO2 + H2O Solutions: CnH2n + O2 → nCO2 + nH2O CnH2n + 2 + O2 → nCO2 + (n+1)H2O CnH2n - 2 + O2 → nCO2 + (n-1)H2O CnH2n - 6 + O2 → nCO2 + (n-3)H2O CnH2n + 2O + O2 → nCO2 + (n+1)H2O |
Type 5: Chemical Equations with Variables
| Exercises: FexOy + H2 → Fe + H2O FexOy + HCl → FeCl2y/x + H2O FexOy + H2SO4 → Fe2(SO4)2y/x + H2O M + H2SO4 → M2(SO4)n + SO2 + H2O M + HNO3 → M(NO3)n + NO + H2O FexOy + H2SO4 → Fe2(SO4)2y/x + SO2 + H2O Solutions: FexOy + yH2 → xFe + yH2O FexOy + 2yHCl → xFeCl2y/x + yH2O 2FexOy + 2yH2SO4 → xFe2(SO4)2y/x + 2yH2O 2M + 2nH2SO4 → M2(SO4)n + nSO2 + 2nH2O M + 2nHNO3 → M(NO3)n + 2nNO + H2O FexOy + yH2SO4 → xFe2(SO4)2y/x + ySO2 + yH2O |
Note: The content is xem bóng đá trực tiếp nhà cái reference only!
What are the 5+ exercise types xem bóng đá trực tiếp nhà cái balancing Chemical equations and solving methods? What is the duration xem bóng đá trực tiếp nhà cái 8th-grade Natural Science in Vietnam? (Image from the Internet)
What is the duration xem bóng đá trực tiếp nhà cái 8th-grade Natural Sciencein Vietnam?
In the General Education Program xem bóng đá trực tiếp nhà cái Natural Science issued alongsideThông tư 32/2018/TT-BGDĐT:
The duration byeach grade is 140 lessons per academic year, taught over 35 weeks. The estimated percentage of lessons allocated xem bóng đá trực tiếp nhà cái each topic is presented in the table below:
| Content | Grade 6 | Grade 7 | Grade 8 | Grade 9 |
| Introduction | 5% | 4% | 2% | 2% |
| Substances and Chemical Changes | 15% | 20% | 29% | 31% |
| States of Matter | 3% | |||
| Oxygen and Air | 2% | |||
| Common Materials, Fuels, Raw Materials, Food | 6% | |||
| Solutions; Separating Substances from Mixtures | 4% | |||
| Atoms. Chemical Elements | 6% | |||
| Molecules | 9% | |||
| Brief Overview of the Periodic Table of Chemical Elements | 5% | |||
| Chemical Reactions | 12% | |||
| Reaction Rates and Catalysts | 3% | |||
| Acid - Base - pH - Oxide - Salt; Chemical Fertilizers | 14% | |||
| Metals | 8% | |||
| Basic Differences between Nonmetals and Metals | 4% | |||
| Introduction to Organic Substances Hydrocarbons and Fuel Sources |
7% | |||
| Ethylic Alcohol, Acetic Acid; Lipids - Carbohydrates - Proteins Polymers | 12% | |||
| Living Organisms | 38% | 38% | 29% | 25% |
| Cells - The Fundamental Unit of Life | 11% | |||
| Biodiversity | 27% | |||
| Metabolism and Energy Transformation in Organisms | 23% | |||
| Response in Organisms | 3% | |||
| Growth and Development in Organisms | 5% | |||
| Reproduction in Organisms; Organisms as a Unified Body | 7% | |||
| Human Body Biology | 20% | |||
| Environment; Ecosystems | 9% | |||
| Genetic Phenomena | 19% | |||
| Evolution | 6% | |||
| Energy and Transformation | 25% | 28% | 28% | 28% |
| Measurements | 7% | |||
| Force | 11% | 8% | 6% | |
| Density and Pressure | 8% | |||
| Energy and Life | 7% | 6% | 7% | |
| Sound | 7% | |||
| Light | 6% | 9% | ||
| Electricity | 8% | 7% | ||
| Magnetism | 7% | 5% | ||
| Earth and the Sky | 7% | 0% | 2% | 4% |
| Visible Motion of the Sun, Moon; Solar System; Milky Way | 7% | |||
| Biosphere and Biomes on Earth | 2% | |||
| Resource Extraction from Earth's Crust; Brief "Chemistry About Earth's Crust" | 4% | |||
| Periodic Assessment | 10% | 10% | 10% | 10% |
Thus, the duration of 8th-grade Natural Sciencein Vietnam is 140 lessonsover 35 weeks.
What do the equipment, specimens, and chemicals used xem bóng đá trực tiếp nhà cái practical lessons under the 8th-grade Natural Science curriculum in Vietnam include?
Under the General Education Program xem bóng đá trực tiếp nhà cái Natural Science issued in association withThông tư 32/2018/TT-BGDĐT, the equipment, specimens, and chemicals used xem bóng đá trực tiếp nhà cái practical lessons under the 8th-grade Natural Science curriculum in Vietnam include:
- Length, area, volume, mass, temperature, time measuring tools; measurement car with integrated position sensor, force sensor xem bóng đá trực tiếp nhà cái motion and friction force studies;
- Dynamometers, measuring tapes, permanent magnets, spring scales; audio frequency generators, tuning forks, oscilloscopes; tools xem bóng đá trực tiếp nhà cái creating and displaying light beams, illuminating areas, mixing light colors; plane mirrors, prisms; tools xem bóng đá trực tiếp nhà cái magnetic field studies, student compasses; permanent magnets, electromagnets;
- Devices xem bóng đá trực tiếp nhà cái examining material density and surface pressure; simple apparatus xem bóng đá trực tiếp nhà cái creating levers; tools xem bóng đá trực tiếp nhà cái generating and redistributing electric charges (Van de Graaff generator, soft silk, plastic comb, etc.); electric energy measurement kit (joulemeter);
- Kits xem bóng đá trực tiếp nhà cái studying light reflection; kits xem bóng đá trực tiếp nhà cái studying light refraction; digital scales; portable pH meters; glassware such as: test tubes, flasks, jars, beakers, funnels, bowls, pipettes, etc.; chemicals: essential chemicals needed xem bóng đá trực tiếp nhà cái demonstration and practical experiments.
- Specimens of fertilizers; models, sets xem bóng đá trực tiếp nhà cái assembling hollow, solid molecules of alkanes, ethylic alcohol, acetic acid.
- Microscopy specimens of cells and cell organelles; kits xem bóng đá trực tiếp nhà cái preparing dried plant specimens, soaking animal specimens; kits xem bóng đá trực tiếp nhà cái exploring wild organisms.
- Practical kits xem bóng đá trực tiếp nhà cái applying bandages to fractures, blood pressure monitors, bandaging tools xem bóng đá trực tiếp nhà cái bleeding injuries. c) Subject room
- Sufficient room space to store equipment, specimens, and tables, chairs xem bóng đá trực tiếp nhà cái students to conduct practical lessons, water taps, sinks, fire safety equipment.
- Fixed equipment: writing board, specimen cupboard, consumables (chemicals, glassware, experiment trays), chemical and laboratory apparatus racks, chart hanging racks, stone-covered practice tables, refrigerators, drying cabinets, dehumidifiers, ventilation fans, protective equipment, tools used according to practical lessons.
- Electronic and optical, audiovisual equipment: microscopes, magnifying glasses, binoculars, computers, projectors, screens, TVs, etc.
