Please explain!SolutionAns 18 - pH is the negative logarithm of the hy.docx

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Please explain! Solution Ans 18 : pH is the negative logarithm of the hydrogen ion concentraion of solution. pH + pOH = 14 So here : 1) pH = 14 - 5 = 9 [H+] = 10 -pH [H+] = 10 -9 M pOH = 5 [OH-] = 10 -pOH = 10 -5 M 2) pH = 2 [H+] = 10 -2 M pOH = 14 - 2 = 10 [OH-] = 10 -10 M 3) pH = -log (1.0 x 10 -8 ) = 8 [H+] = 1.0 x 10 -8 M pOH = 14 - 8 = 6 [OH-] = 10 -6 M 4) pH = 14 - 10 = 4 [H+] = 10 -4 M [OH-] = 1.0 x 10 -10 M pOH = -log (1.0 x 10 -10 ) = 10 .

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Please explain how HDFS provides redundancy for stored data Solution HDFS is designed to reliably store very large files across machines in a large cluster. It stores each file as a sequence of blocks; all blocks in a file except the last block are the same size. The blocks of a file are replicated for fault tolerance. The block size and replication factor are configurable per file. An application can specify the number of replicas of a file. The replication factor can be specified at file creation time and can be changed later. Files in HDFS are write-once and have strictly one writer at any time. The NameNode makes all decisions regarding replication of blocks. HDFS uses rack-aware replica placement policy. In default configuration there are total 3 copies of a datablock on HDFS, 2 copies are stored on datanodes on same rack and 3rd copy on a different rack. .

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Please describe cash flows from investing activities, and provide three examples of cash inflows and three examples of cash outflows. for discussion *update don\'t answer it posted twice and points will not be awarded. thank you* Solution Cash flow from investment activities deals with either cash inflow or cash outflow due to investment decisions taken up by the company. It deals with acquiring or selling off companies long term / fixed assets. Three examples of cash outflow from investment activites: 1. Buying Land or investment in furnitutes / fixtures 2. investment in stocks and debentures of other companies 3. Buying Another plant or Machinery Three Examples of Cash inflows from investment activities. 1. Selling of old machineries 2. Selling of subsidiaries 3. Selling technology know -how .

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please answer the following, thanks!!! Question 3 (1 point) 6 Rutherford\'s experiment was important because it showed that: . The mass of the atom is uniformly distributed throughout the atom An atom is mostly empty space Radioactive elements give off alpha particles Gold foil can be made to be only a few atoms thick. A zinc sulfide screen scintillates when struck by a charged particle Save Solution Rutherford experimet showed that An atom is mostly empty space ( this conclusion indicates atom has mass concentrated at center of atom whose volume is small compared to atom . center area is called nucleus contains protons and neutrons , while electrons lie around nucleus.) .

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Please answer questions 1-4, thank you! Solution 1. Acids are the conpounds which give H+ ions in the aquous solution. Bases give OH- ions innthe aquous solutions. Acids are the proton donors and bases are the proton acceptors. 2. Litmus paper is the most common indicator used in the labs. Litmus turns green ti basic and red to acidic. Other is methyl ornage shows pink in acidic medium and shows yellow in basic and phenophthaline etc. 3. HClO is an acid it can give H+ ions i.e proton. Na2CO3 is formed by H2CO3 and NaOH. So it is a neutrilisation of weak acid with strong base so it will be a basic salt. H2O is neutral. H3BO3 is boric acid. As the name suggests its an acid it can donate H+. 4. Anything less than pH=7 is acidic uptill 1. pH=7 is neutral pH>7 is basic uptill 14 .

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