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Chemistry Quiz 40 (25 MCQs)

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1. The maximum amount of solute that can dissolve in a given amount of solvent at a given temperature and pressure
2. How many molecules of oxygen, O2, are needed for the complete conbustion of two moles of buane
3. What is H 2 4 made up of?
4. Which of the following is not a pure substance?
5. How many sig figs are there? 27000000
6. A pure substance made of the same type of atoms is called a(n)
7. As you and your lab partner mix two clearsolutions during a science experiment, a red solid forms. What is this solidcalled?
8. Combinations of 2 or more substances (elements and compounds) that are physically blended together.
9. What is Polymer?
10. Simple sugars, or monosaccharides, such as glucose are the building blocks of
11. The mixture of two or more metals, combined in order to produce a material with more useful properties than any of the components individually is called.
12. _____ is a synthetic polymer made from coal, water limestone or other similar basic raw materials.
13. Fe is the chemical symbol for the element.
14. The density of pyrite is 5g/cm3 . This is an example of
15. What is the name given to a set of controlled observations that test a proposed explanation?
16. Cm3 of nitric acid completely neutralises 50 cm3 of 0.25 mol dm-3 calcium hydroxide. Calculate the molarity of the nitric acid.
17. What is the mass of one mole of aluminum?
18. The number of protons in the nucleus of an atom
19. What type of elements are generally found in covalent drawings?
20. What is the symbol for Potassium?
21. Subatomic particles with a positive charge
22. Each column in the periodic table is called a
23. If the mass of $ H_2O$ in a glass is $ 36g$ . then calculate the $ no.\ of\ moles$ if the $ molar\ mass$ of $ H_2O$ is $ 18g$ . HINT:use the following formula:$ No.\ of\ moles=\frac{Mass\ in\ g}{Molar\ mass}$
24. What is the observation obtained when alkene react with acidified KMnO4
25. What is the three-dimensional arrangement of atoms that forms a molecule?
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