State the place value of the underlined digit in 6 953 742. A Hundreds C Ten thousands B Thousands D Hundred thousands ( 3. Round off 5 987 341 to the nearest hundred thousand. A 5.8 million C 6.0 million ( B 5.9 million D 6.1 million 4. Which of the following numbers, when rounded off to the nearest thousand, becomes 7 541 000?
2) Define weighted average- An average that takes into account the proportional relevance of each component, rather than treating each component equally. 3) Place one atom of each isotope on the scale. Divide the mass by 3 to fine the straight average. How is this number different from your average atomic mass? Number – 19g average mass 1.7g 4) If a 4th isotope of beanium, D (green), were added to the pool, how would the average atomic mass change?
According to Bender oxygen and hydrogen are elements other than carbon used to define mole. A mole is the quantity of an element that weighs out in grams the amount of an element specified by the atomic weight. Work Cited Bodner , George M. "How was Avogadro's number determined?." scientific american. © 2013 Scientific American, a Division of Nature America, Inc., 16 Feb 2004.
What element in Period 5 of the periodic table is a member of Group 14? (1 point) Answer: The element that is in Period 5 as well as Group 14 is tin or Sn. 4. The word interpolate means to use a given line graph to find unknown points between the plotted points of the graph. Use your line graph from Part II to interpolate, or estimate, atomic radius of Tin (Sn).Â (1 point) Answer: By using the given line to interpolate the atomic radius of tin, it can be found that its radius is around 149pm.
I. Bean Bag Isotope II. The purpose of this experiment is to investigate the mass properties and relative abundance of isotopes for the “bean bag” element and to calculate the atomic mass of this element. III. Pre-Lab Questions A. The first possible property of electrons and protons that led to their discovery was their “positive rays,” positively charged streams of atoms generated in gas discharge tubes from J.J. Thomson’s experiment.
Number of moles of CuCl2 used = [pic] =[pic] = 0.127 moles Therefore, Molarity of CuCl2 = [pic] = [pic] = 0.063 mol/dm3 Number of moles of ethylenediamine used = [pic] =[pic] = [pic] = 0.1 mole Therefore, Molarity of ethylenediamine = [pic] = [pic] = 0.05 mol/dm3 2. Plot a graph of absorbance versus mole fraction of ligand. 3. From the graph, look for the maxima and from the corresponding mole fraction, determine the formula of the complex. Maximum absorbance occur when mole fraction of ligand is 0.65.
Each color had the following number of pieces: Green 16, Orange 10, Brown 6, Yellow 9, Red 6, and Blue 9. Bag number 2 had 58 pieces, and bag number 3 contained 57 pieces. Each column was added up and the sample proportion of each candy was given by taking the total number of candies from all bags and dividing the sum by the total number of candies. Step three: In step three of the project a confidence interval was constructed for the proportion of each color along with the mean number of candies per bag. A confidence
The first class in a relative frequency table is 50–59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate? Answer: 0.2 is equal to 1/5 or 20%, 0.2 indicates 20% of the data values are in this particular interval. 3. When you add the values 3, 5, 8, 12, and 20 and then divide by the number of values, the result is 9.6.