First six weeks review
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Taks review obj 4 with answers
The document discusses several key chemistry concepts including:
1) Density is a property of matter defined as mass per unit volume and determines if something will float or sink in a fluid.
2) Viscosity is a measure of a fluid's resistance to flow, such as honey being more viscous than water.
3) Buoyancy causes objects to float and is determined by an object's density compared to the fluid it is in.
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This document discusses trends in properties of elements within the periodic table. It covers which period chromium is in, which element has a valency of 3, the electron configuration of magnesium, the type of bonding in magnesium chloride, the chemical formula of barium oxide, what governs the boiling point of halogens, and periodic trends in ionization energy and atomic radius. It also mentions which atoms buck the general trend of ionization energies and asks which of the options are periodic trends in atomic radius.
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Here are the elements and ratios for the compounds:
1) C6H12O6 - Carbon: 6, Hydrogen: 12, Oxygen: 6
2) NH3 - Nitrogen: 1, Hydrogen: 3
3) AlCl3 - Aluminum: 1, Chlorine: 3
4) H2O2 - Hydrogen: 2, Oxygen: 2
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Based on the information provided, explain the following observations:
1. When magnesium burns in oxygen, the products are magnesium oxide with a mass ratio of 1 part magnesium to 1 part oxygen.
2. When lead is heated strongly in air, two different oxides are formed - litharge, which is yellow and has a lead-to-oxygen ratio of 1:1, and massicot, which is lighter yellow and has a lead-to-oxygen ratio of 1:2.
3. When hydrogen burns in oxygen, the only product is water with a hydrogen-to-oxygen mass ratio of 1:8.
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https://www.deped.gov.ph/wp-content/uploads/2019/01/General-Chemistry-1-and-2.pdf
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https://www.deped.gov.ph/wp-content/uploads/2019/01/General-Chemistry-1-and-2.pdf
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Chemical reactions and chemical equations
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Dalton’s Law of partial pressures
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Taks review obj 4 with answers
The document discusses several key chemistry concepts including:
1) Density is a property of matter defined as mass per unit volume and determines if something will float or sink in a fluid.
2) Viscosity is a measure of a fluid's resistance to flow, such as honey being more viscous than water.
3) Buoyancy causes objects to float and is determined by an object's density compared to the fluid it is in.
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This document discusses trends in properties of elements within the periodic table. It covers which period chromium is in, which element has a valency of 3, the electron configuration of magnesium, the type of bonding in magnesium chloride, the chemical formula of barium oxide, what governs the boiling point of halogens, and periodic trends in ionization energy and atomic radius. It also mentions which atoms buck the general trend of ionization energies and asks which of the options are periodic trends in atomic radius.
3.1 Atoms
Here are the elements and ratios for the compounds:
1) C6H12O6 - Carbon: 6, Hydrogen: 12, Oxygen: 6
2) NH3 - Nitrogen: 1, Hydrogen: 3
3) AlCl3 - Aluminum: 1, Chlorine: 3
4) H2O2 - Hydrogen: 2, Oxygen: 2
History of the Atomic Structure (part1)
Based on the information provided, explain the following observations:
1. When magnesium burns in oxygen, the products are magnesium oxide with a mass ratio of 1 part magnesium to 1 part oxygen.
2. When lead is heated strongly in air, two different oxides are formed - litharge, which is yellow and has a lead-to-oxygen ratio of 1:1, and massicot, which is lighter yellow and has a lead-to-oxygen ratio of 1:2.
3. When hydrogen burns in oxygen, the only product is water with a hydrogen-to-oxygen mass ratio of 1:8.
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https://www.deped.gov.ph/wp-content/uploads/2019/01/General-Chemistry-1-and-2.pdf
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Science, Technology, Engineering, and Mathematics
K to 12 Senior High School STEM Specialized Subject – General Chemistry 1 and 2
Quarter 1 – General Chemistry 1
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Dalton’s Law of partial pressures
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Kinetic molecular theory of gases
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This document contains a 10 question multiple choice test on electronic structure of atoms. The questions cover topics like calculating frequencies of electromagnetic waves based on wavelength, exceptions to the Aufbau principle in electron configuration, writing electron configurations using noble gas notation, identifying elements based on their electron configurations, relationships between emission spectra and electron energy changes, the Heisenberg uncertainty principle, limitations of Rutherford's model of the atom, and the number of electrons that can occupy atomic orbitals.
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https://www.deped.gov.ph/wp-content/uploads/2019/01/General-Chemistry-1-and-2.pdf
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Kinetic molecular theory of gases
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3) Factors like temperature, surface area, concentration, and catalysts can affect the rate of a chemical reaction.
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The document discusses 5 types of chemical reactions:
1. Combination reactions where two or more substances combine to form a single product.
2. Decomposition reactions where a single compound breaks down into simpler substances.
3. Single replacement reactions where an element replaces another element in a compound.
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5. Combustion reactions where a substance reacts with oxygen to produce heat, light, and new substances.
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3) Chemical bonds between atoms form molecules and determine molecular structure and function. The main types of bonds are covalent, ionic, and hydrogen bonds which vary in strength. Molecular shape is important for biological functions.
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2. Heating curves are discussed, showing how energy absorption or release occurs during phase changes like melting and boiling. The concepts of endothermic and exothermic reactions in relation to energy changes are introduced.
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Reloj
La Unión Europea ha propuesto un nuevo paquete de sanciones contra Rusia que incluye un embargo al petróleo ruso. El embargo se aplicaría gradualmente durante seis meses para el petróleo crudo y ocho meses para los productos refinados. Este paquete de sanciones requiere la aprobación unánime de los 27 estados miembros de la UE.
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First six weeks review
- 1. When a rock is dropped into a graduated cylinder, it raises the water in the graduated cylinder from 35ml to 40ml. If the mass of the key is 50g, what is the density of the key, in grams per milliliter? Use the picture to answer the following question. 7 The picture shows a graduated cylinder before and after a rock was added. What is t rock? Grade 8 Science, SW1
- 2. The following table shows properties of four different sample materials. One of these materials is cork, a type of wood that floats in water. Given that the density of water is 1g/mL, which of these samples is most likely cork? • A Sample 1 • B Sample 2 • C Sample 3 • D Sample 4 Physical Properties Sample Number Mass Volume Sample 1 89 grams 10 ml Sample 2 26 grams 10 ml Sample 3 24 grams 100 ml Sample 4 160 grams 100 ml
- 3. Vanessa was given a science kit containing a small piece of metal and the Data Table shown above. Each side of the metal was measured to be 2cm, and he measured the mass of the cube to be 41.6g. Based on the data table above, which mineral isVanessa’s cube composed of?
- 4. If the balance on the triple beam balance shows the mass of a book in grams, how many kilograms is the book? (remember King Henry Died by Drinking Chocolate Milk) A. 0.6319 kg B. 6.319 kg C. 632 kg D. 631,900 kg E. None of the above B 4 C 7 D 12 12 What is the mass, in grams, shown on the balance below?
- 5. • How many negatively charged particles are in the Bohr atom model shown to the above?
- 6. Which atom is heaviest in mass?
- 7. This is a Bohr model of what atom? (hint..remember count the protons)
- 8. What is the electrical charge of this atom A. -1 B. 0 C. +1 D. +2 E. +3
- 9. Which model has the correct number of valence electrons (hint..remember to look at group/family ex. 1A, 2A, 3A, etc)
- 10. Alkali Metals, Boron Family, Halogens, Alkaline Earth Metals, or Noble Gases, Properties of ?
- 11. How many elements are located in this chemical formula?
- 12. Organic or Inorganic Which molecule match each above? C3H8 + 5O2 → 3CO2 + 4H2O
- 13. Which part of the periodic table is mostly used in our electronics?
- 14. You GOT IT!!! STUDYTonight!!! What doYOU need to do so you don’t look like these two guys tomorrow?