What's NewI. A. Composition of Compounds Directions: 1. Study the table on the next page and copy it on a sheet of paper. 2. Write the symbol of the e … selos malala tandaan nyo yan whaha pa help nmn po need ko na po ngayon math po eto PA HELP PO SA CHEMISTRY 1.A Compound has empirical formula of C₂H5N and molar mass of 86.16 g/mol. What is its molecular formula? 2. Calculate the molecular formula of a comp … Cholera in the Iloilo Citymake an scientific method about thisobservation:Making a question:Formulating Hypothesis:Performing Experiment:Gather Data:C … Identify and explain the characteristics of a good research problem? How can you distinguish a researchable from nonrechargeable research Direction: Fill in the blanks. Write the right word on the blanks that will complete each statement. Choose your answer from the box below. edible pla … what is the corillo? concept map. explore the types of plate boundaries making up the Earth's crust by completing the concept map below. Choose your answer the box provide … activity b. label the parts for the heart how yoga and cardio improves the body's ability to do heavy and strenuous activities. In the box, write 3-4 sentences. Based on what you understand so far, explain how these kinds of exercises improve the body's ability to do heavy or strenuous activities. In the box, … give me three texture on mask and explain it Why is it important to the steps or procedures in doing an activity??pleasee helppp mee asap:> the theory states that the earths crustal piece ls called _____ moving over hot ____ in the _____layer of the earthpasagot po to find out which of the two brands of bleach, A or B, is more effective in removing coffee stain from white shirt. She made mixtures of the two bleac … The moderator collects the meta cards and reads each one of them while showing the cards to the whole group so that everyone can read them. White flower + red flower = pink flower
This science fair project focuses on the use a conductivity device that will enable the investigator to determine if a substance dissolved in water can or cannot conduct electricity and if it can, what type of conductor (electrolyte) it is. From the observations made a data table will be generated and results displayed in the form of a graph. Conductivity device, plastic cups, large paper clips, masking tape, distilled water, mineral water, table sugar, carbonated soda, table salt, and household vinegar. With the exception of the conductivity device all of the materials can be purchased from the local supermarket or major retail (Wal-Mart, Target, Dollar General, etc) discount department store. The Tri-fold display board can be purchased from an art & craft store. A conductivity device can be purchased from the following online venders:
An electrical current results from the motion of electrically charged particles in response to forces that act on them from an applied electric field. Pure water is not a good conductor of electricity. Some substances when dissolved in water to produce a solution will conduct an electrical current. Such substances produce ions (charged electrical particles) when dissolved in water and these ions carry the current through the solution. Solutions that contain this capability are called Electrolytes. Because the electrical current is transported by the ions in solution, the conductivity increases as the concentration of ions increases. Non-electrolytes are substance when place in water do not produce solutions that contain ions and hence do not conduct an electrical current. Electrolytes can be classified as either strong electrolytes or weak electrolytes depending on their ability to ionize completely or partially. Electrical conductivity can be measured using a conductivity measuring device consisting of two metal electrodes usually spaced 1 cm apart (thus the unit of measurement is microSeimens or milliSeimens per centimeter). A constant voltage is applied across the electrodes resulting in an electrical current flowing through the solution to be tested. Since the current flowing through the solution is proportional to the concentration of dissolved ions in the water, the electrical conductivity can be measured. The higher the dissolved ion concentration, the more conductive the sample and hence the higher the conductivity reading. A conductivity device is commonly used in hydroponics, aquaculture, swimming pools, and freshwater systems to monitor the amount of nutrients, salts or impurities in the water. Digital photos can be taken during the experimenting process and the following websites offer down loadable images that can be used on the display board:
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