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Question 49 (1 point) Saved You have 7.57 g of each of the following elements: S,...
Question 49 (1 point) Determine the correct set of elements that contain the same number of valence electrons? K, Sr, Fr Ga, TI, B Mn, Re, Nb, V Si, Ca, C CI, At, B
QUESTION 10 Which of the following elements is the most electronegative? O S ose O Te O Po QUESTION 11 Which of the following would you expect to have ionic bonds? O HBr O CO Oicl O CsF NF3
Question 56 (1 point) Four elements: W, X, Y and Z have successive atomic numbers. Each atomic number increased by one in the order given. Element Y is a noble gas. Element W would most likley form a compound with: O lithium with the formula LiW. O iodine with the formula Wiz. O element Z with the formula WZ. hydrogen with the formula H2W. Question 61 (1 point) An element X combines with element Y to form a compound. If...
3 S 6 9 Question 49 (2 points) Saved You prepare a solution by adding a solid to water and shaking vigorously. After letting it settle, you observe solid at the bottom and a transparent solution above the solid. Which term properly describes the solution above the solid? 12 supersaturated insoluble 15 saturated 18 unsaturated Question 50 (2 points) ✓ Saved A precipitate is expected to be formed when an aqueous solution of sodium sulfate is added to an aqueous...
Saved Question 8 (1 point) Saved For the cell diagram Pt(s) | Br2(1) | Br-(aq) || Cl-(aq) | Cl2(g) | Pt(s) which reaction occurs at the anode? O Cl2(g) + 2Br (aq) --> 2C1-(aq) + Br2(1) O Br2(l) +2e --> 2Br" (aq) O 2Br"(aq) --> Br2(I) + 2e O Cl2(g) +2e --> 2014(aq) O 2014(aq) --> Cl2(g) + 2e
Question 3 (1 point) Which contains the largest total number of atoms? O 1 mol C2H6 O2 mol CH4 O 3 mol H2O 06 mol He All contain the same number of atoms
Question 4 (1 point) ✓ Saved Forty percent of all registered voters in a national election are female. A random sample of 5 voters is selected. The probability that the sample contains 2 female voters is 0 0.0778 O 0.7780 O 0.5000 0.3456 Question 5 (1 point) ✓ Saved A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample information. Cups of Coffee Frequency. 700 900 600...
Which of the following samples contains the largest number of atoms: 2.0 g He, 2.0 g Ne, or 2.0 g Ar? How do you know? Justify your choice. Consider the elements aluminum (Al), sodium (Na), and sulfur (S). a. Arrange these three elements in order of increasing ionization energy. b. Discuss how the structures of the atoms of these three elements determine the relative strengths of the attractive electrostatic forces. Be sure to specify what is interacting to create the...
saved Question 2 (1 point) From a population of 200 elements, the standard deviation is known to be 14. A sample of 16 elements is selected. It is determined that the sample mean is 56. The standard error of the mean is 3.5 less than 3.5 less than 2 Save
1. a) (1 mark) Arrange these elements in order of increasing atomic radius, from smallest to largest: Sb, S, Pb, Se Smallest smallest b) (1 mark) Arrange this isoelectronic series in order of increasing radius, from smallest to largest: Se?, Sr2*, Rb, Br Smallest Largest c) (1 mark) Arrange these elements in order of increasing first ionization energy, from smallest to largest: CI, S, Ge, Pb smallest < < < Largest NAME AND STUDENT NUMBER: 2. (4 marks) A molecule...