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How would you classify Table Sugar and table salt? An atom, elements, mixtures or a pure substance and why?
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- Direction: Encircle the statement/word which you think gives the correct answer to the question. Which one of the following statements best supports the idea that matter is made up of particles? Metals expand when heated. if a bottle of perfume is opened, the smell spreads quickly. Water always fills the space available to it. Gases are usually lighter than liquids. Which of the following is NOT a property of a compound? It can be broken down into simpler substances. It consists of multiple phases. It has definite temperature. It has a uniform appearance. Water behaves like most other molecules in all ways, except that ________. It interacts strongly with other water molecules. It can exist as a solid, liquid, or gas. Its temperature correlates with how rapidly its molecules are moving. Water in an open container is absorbed by the container, disappears, changes into air, or dries up, and goes into the air. 4.Which of the following provides evidence that air is a mixture?…When exactly 1 cup of sugar is dissolved in exactly 1 cup of water, less than 2 cups of solution result Why?A 50 wt% Ni–50 wt% Cu alloy is slowly cooled from 1400°C (2550°F) to 1200°C (2190°F): a) At what temperature does the first solid phase form? b) What is the composition of this solid phase? c) At what temperature does the liquid solidify? d) What is the composition of this last remaining liquid phase?
- When can you say that a chemical system is a substance or a mixture?Chains support a crate, as shown in Fig. 5.20. The equations relat- ing tensions T₁ and T₂ are given below. Determine the tensions to the nearest 1 N from the graph. T₁ 0.87₁ 0.67₂ = 12 0.67₁ +0.87₂ = 68 Fig. 5.20 68 N T, 12 NPlease help me understand this. I don't know how to even start, which formula to use, I don't understand how cos, tan, sin are used in the solution and I don't know why either. Can you please explain this step by step, including explanations for why a specific formula is used, how it is used and just help me grasp this. Thanks
- A loss of an oxide atom results in a 'vacancy'. The presence of these vacancies is required for conductivity in the solid state. How many vacancies will be in the doped cell? Explain how these vacancies allow oxide ions to move through the material.What state is Br2 in the following equation? S (s) + Br, (1) –→ SBr, (g) Solid Liquid Gas Aqueous 2 point What state is CO2 in the following equation? Na,CO, (s) + 2 HCI (aq) → 2 NaCl (aq) + H,O (1) + CO, (g)When a substance reaches a boil, there is a vigorous process whereby the fluid erupts and large bubbles form. Explain what is happening on a molecular level? Explain the boiling process? What creates the “rolling boil” effect?