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Chemistry Quiz 22 (25 MCQs)

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1. Ability of carbon atom to bond with other carbons to form a chain of endless variety.
2. How many water molecules are in 5.2 moles of water?
3. How many total electrons does O-2 (an oxide ion) have?
4. Select the chemical symbols for the following elements in the correct orderHelium, Lithium, Florine, Carbon, Potassium, Phosphorus
5. You have 85.5 g of fluorine, which has a molar mass of 19 g/mol. how many mols of fluorine do you have?
6. Silicon (Si) has _____ shells
7. Valence electrons are
8. Anything which takes up space and has mass is
9. What is the relative mass of a proton?
10. The trace element that helps maintain the shape of some proteins by forming bonds is
11. Starting Materials of a chemical reaction
12. Suppose you have a glass of unknown liquid that you want to identify. It looks like milk, but you cannot be sure. How could it be determined?
13. Which scientist described the existence of the neutron?
14. What is the mole ratio in the following reaction:2CO + O2 $\rightarrow$ 2CO2
15. The solute that falls out of a solution (like rain)
16. How much stronger is a substance with a pH of 2 when compared to substance with a pH of 5?
17. In the Lewis dot structure of Barium (Ba) this is how many dots you will draw
18. The horizontal rows of the periodic table are called
19. If body fluids are becoming too acidic, this means that there are excess _____ ions in the fluid?
20. The nucleus of an atom is
21. An example of an extensive property is
22. What is the number of neutrons in bromine-80?
23. Which physical property of matter describes the relationship between mass and volume?
24. Calculate the molar masses of the following compounds and list in the correct order.H2, SO4, (NH4)2CO3, Pb3(PO4)2, C6H12O6, HCl
25. A sample of methane, CH4, occupies 4.50 dm3 (Liters) at STPHow many moles of this gas are present. (Note:One mole of any gas occupies 22.4 liters at STP)
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