over a burner flame until the wax melts completely; then allow the sample to cool. Next‚ light the candle‚ secure it to a glass square‚ and allow it to burn until it extinguishes itself. Proceed with rest of the experiment while the candle burns. 2. Tear a piece of paper (about 5 cm x 10 cm) into small pieces. Set a watch glass on an insulating square and place the pieces of paper on the glass. Ignite the paper with a match and allow to burn. 3. Add a microspatula of NaCl (sodium chloride)
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electronegative atom from a dissimilar chemical group. Also it is stronger than a Vander Waals forces‚ but weaker than ionic and covalent bonds. 3.2 List FOUR properties of ionic compounds. 1. High melting point: 800°C 2. They form crystals 3. Non-conductive in its solid state 4. They have higher enthalpies of fusion and vaporization than
Free Atom Electron Covalent bond
1. ____ Cu +_______Cl2 ® _________ CuCl 2. _____ H2O ® ______ H2 + _______ O2 3.______ KBr + _______ AgNO3 ® ______ KNO3 + _______ AgBr 4. ______ CH4 + _______O2 ® ________ CO2 + ________ H2O 5._______ Zn + _______ HCl ® ________ H2 + _______ ZnCl2 6. _____Fe + ______ H2O ® _______ Fe3O4 + _______ H2 7.______ AlBr3 + _______ Cl2 ® _______ AlCl3 + ________ Br2 8.______K2CO3 + _____ H3PO4 ® _________ H2CO3 + _______K3PO4 9.______ Al + ______ Pb(NO3)2 ® _______ Al(NO3)3 + ______ Pb 10.____ P
Free Carbon dioxide Oxygen Calcium
| 5.821 | Mass of empty weighing bottle (±0.001) /g | 4.321 | Mass of FA1 (±0.002) /g | 1.500 | Volume of FA3 prepared = 250.00 ± 0.12 cm3 Volume of FA3 used for titration = 20.00 ± 0.06 cm3 Titration of FA3 against FA2 | | Run 1 | Run 2 | Run 3 | Final volume of FA2 (± 0.05) /cm3 | 25.30 | 25.40 | 25.45 | Initial volume of FA2 (± 0.05) /cm3 | 0.00 | 0.00 | 0.00 | Volume of FA2 used (± 0.10) /cm3 | 25.30 | 25.40 | 25.45 | Titration used | | √ | √ | Qualitative observations:
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of materials • To observe potential hazards • To investigate the effects of strong bases‚ strong acids‚ acetone and bleach on a variety of materials which include sugar‚ cotton‚ nylon‚ hair‚ polystyrene‚ egg white‚ egg yolk‚ and aluminum foil. 2. Give a summary of your observations for each of the experiments. (24 pts) Sugar + H2SO4 Black clumped substance formed C12H22O11(s) + H2SO4 12C(s) + 11H2O(g) Cotton + HCl No visible change Cotton + H2SO4 Slight color change (light reddish brown)
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apprehension of an object in an intense thrust of energy toward it that enables one to realize specific distinctiveness. Ultimately‚ the instress of inscape leads one to Christ‚ for the individual identity of any object is the stamp of divine creation on it.[2] This is related to a logocentric theology and the Imago Dei. A logocentric theology of creation is based on correlation of the Genesis account and John 1. Since all creation is by the Word (divine fiat) human identity in God’s image is grounded in
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with cranberry also make fine ciders; and many other fruit purees or flavorings can be used‚ such as grapes‚ cherry‚ raspberry. The cider is ready to drink after a three month fermentation period‚ though more often it is matured in the vats for up to 2 to 3 years. History of Fermentation Since fruits ferment naturally‚ fermentation precedes human history. Since ancient times‚ however‚ humans have been controlling the fermentation process. The earliest evidence of winemaking dates from eight thousand
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When a really large unstable isotope changes into to smaller isotopes that are 2 completely different elements. the nucleus has to be larger than 230(mass). They are really slow and spontaneous. Fission = splitting. Can create a chain reaction. (picture above). Critical mass= must be enough mass in a reaction or enough fission type mass‚ fissionable mass‚ for the reaction to continue to go on.(minimum amount). Sub critical mass= mass of fission material that doesn’t have enough to keep the reaction
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considered very toxic. Large quantities of curium are now easily made in nuclear reactors. A nuclear reactor is a device in which neutrons split atoms to release energy for electricity production. 1.Curium is highly radioactive and it glows red in the dark 2.Curium is mainly used for scientific research purposes 3. Curium-244 was used in the Alpha Proton X-ray Spectrometer (APXS) which measured the abundance of chemical elements in rocks and soils on Mars. 4. it has a melting point of 1340°C Curium was
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hypothesis was correct. We now could concluded the densities and identification. The density of Unknown Liquid 1 was 1.26 which was found to be Colorless Glycerin (also density of 1.26) and Unknown Liquid 2 was 0.88 or Rubbing Alcohol (colorless). Unknown Solid 1 has a density of 7.20 or Iron‚ Solid 2 is 2.59 and Aluminum‚ Solid 3 is 5.47 and Tin‚ while Solid 4 has a density of 9.81and Nickel? We Errors Analysis (Distinguishes percent of error in calculations) Some errors we faced were water
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