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Chemistry

140 Terms
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The picture below shows the correct Lewis Dot Structure of HCN.

  1. How many significant figures are in 6,000.00?
    A.4
    B. S
    C) 6
    D.7

7

Add the following numbers and round to the appropriate significant figures;
13.5 cm + 96.2312 cm + 79 cm

D. 190 cm

  1. Multiply the following numbers and round to the appropriate significant figures:

121,500 m2

25. For the following molecule below, which statement is correct? A. It is a nonpolar molecule, due to everything being equal and all dipole moments canceling out. B. It is a polar molecule, due to an imbalance of strength with the fluorine atoms. C. It is a metallic molecule, due to the metallic bonds present in the bonds. D. None of the above.
26. In this Lewis Structure below, the symbol above F means. A. Electrons are less attracted to fluorine compared to hydrogen. Liccuons are being wansicired to fuvrine from ny urogen. C. Electrons are getting pulled towards fluorine and away from hydrogen. D. Fluorine has formed an anion.
For the following molecule below, which statement is correct? A. This is a nonpolar molecule and there would be no dipole moment. B. This is a polar molecule and the net dipole moment would point upward, towards phosphorus. C. This is a nonpolar molecule due to all of the dipole moments canceling each other out. D. This is a polar molecule and the net dipole moment would point downward, towards chlorine.
When looking at the bonds between the three carbon atoms, which answer is correct using the Lewis diagram shown above? A. The carbon-to-carbon bond on the right is stronger because there are more hydrogen atoms attached to the rightmost carbon atom than to the leftmost carbon atom. B. The carbon-to-carbon bond on the left is weaker because it is a double bond. C. The carbon-to-carbon bonds are the same strength because the C-C-C bond angle is 180° D. The carbon-to-carbon bond on the left is stronger because it is a double bond.
30. Water molecules are polar covalent molecules. There is a partial negative charge near the oxygen atom and partial positive charges near the hydrogen atoms, due to the uneven distribution of electrons between the atoms. This uneven distribution results in the formation of hydrogen bonds between water molecules. The polarity of water molecules contributes to many properties of water that are important for biological processes. Which of the following models best demonstrates the arrangement of hydrogen bonds between adjacent water molecules?
The figure above shows a strong attraction between two HCI molecules. What is the name of this attraction?
Looking at the picture below of methane, what are the VSEPR and bond angles of this molecule?
34. Based on the picture above, what is the best explanation as to why the central atoms (sulfur on the left and arsenic on the right) are able to break the Octet Rule?

  1. In a molecule in which the central atom exhibits sp2 hybrid orbitals, the VSEPR shape could be:

C.) Trigonal Pyramid

9. Given the picture above, what did the Rutherford experiment conclude?
21. The picture below is displaying the correct electron dot structure for oxygen (O): A False B. True
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7. Given this picture above, of a beryllium atom, what is incorrect about its drawing? A. There are too many electrons in the drawing. B. The 2s orbital is drawn too large. It should not be drawn over the Is orbital. G, There is a mistake with saying that beryllium has 4 protons (p+). D, There are no incorrect things about this drawing of beryllium.
12. Name the element whose mass spectrum is shown above.
Average Atomic Mass Equation: The % of EACH isotope's mass in the element, followed by the summation of these percentages. The mass spectrum for an unknown element is shown above. According to the information in the spectrum, the average atomic mass of the unknown element is closest to:
17. Which of the following is correct about Millikan's Oil Drop Experiment (shown in the picture above)? A. It was used to discover protons. B. It was used to discover that electrons are negatively charged. C. It was used to discover the magnitude of an electron's charge (9.11 x1031 coulombs) and the mass of an electron (-1.602 x 10-19 kg). D It was used to discover the magnitude of an electron's charge (-1.602 x 10-19 coulombs) and the mass of an electron (9.11 x 10-31 kg).
Which of the following represents the correct orbital notation of an oxygen atom
Which of the following is correct about electrons depicted in the diagram below?
20. Analyzing the table, you observe that there are different columns that are listed. What term correctly describes the top row of characteristics (color, melting point, boiling point, etc.) on this table?
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