balance across the plant. What is Ammonia Ammonia (NH3) is a stable compound and is used as a starting material for the manufacture of many important nitrogen compounds and can also be directly used as fertilisers. It is produced by reacting hydrogen and nitrogen. It is a colourless gas with a sharp odour. The boiling point is -33.35oC and its freezing point is -77.7oC.1 Care must be taken when handling ammonia as can cause deep burns in the skin; irritation in the eyes and nose and when inhaled
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Gas | Flame Reaction | Glowing Splint | Limewater Reaction | Bromothymol Blue Reaction | Hydrogen | Quick burst | N/A | N/A | N/A | Oxygen | N/A | Quick bursts as if trying to re-ignite | N/A | N/A | Hydrogen & Oxygen | I got no reaction for this step | N/A | N/A | N/A | Carbon Dioxide | Put the flame out | N/A | Bubbled slightly and turned cloudy | Bubbled slightly‚ amd turned yellow | Alka Seltzer | N/A | N/A | Bubbles vigorously | N/A | Breath | N/A | N/A | Bubbles vigorously
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smallest structure in this list that can be seen with an ordinary desk microscope? 1. 2. 3. 4. Cells. Cell nucleus. Atoms. Chain molecules‚ such as proteins. Atoms In our model of scale‚ remember that the BB represented an atom. Electrons Hydrogen Helium Neutrons Protons As a class‚ identify the atoms represented here and label the sub-atomic particles. Carbon OxygenPhosphorous Calcium What elements are represented here? Use the Periodic Table on the wall to identify these atoms. What
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the following molecules: water‚ ammonia‚ carbon dioxide‚ fluorine‚ methane‚ ethane 2. Write the formulas and draw the two-dimensional structures in the table. 3. Chose one color candy to represent each atom of an element (e.g.‚ red jelly bean = hydrogen). Create a key that identifies each element. 4. Use the candy‚ toothpicks‚ and/or twist ties to construct a three- dimensional model of each of the aforementioned molecules. 5. Draw‚ as accurately as possible‚ each model in the table. 6. Answer
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assumed to be 1. It is best to begin with an element other than hydrogen or oxygen. These two elements often occur more than twice in an equation. 5. Check each atom or polyatomic ion to be sure that the equation is balanced. 6. Finally‚ make sure that all the coefficients are in the lowest possible ratio. Now let’s use these rules to balance the equation for the formation of water from hydrogen and oxygen. Example 3 When hydrogen and oxygen react‚ the product is water. Write a balanced
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set up my data table. I combined the zinc and HCl‚ then captured the Hydrogen that was produced and observed the combustion reaction with a flame. I then captured more hydrogen to use later in the experiment. I combined manganese with hydrogen peroxide which bubbled much the same as the zinc and HCl to produce oxygen. I observed the reaction of the oxygen with a burning ember. I then captured more oxygen in the bulb with the hydrogen‚ and observed itʼs reaction of extinguishing the flame. I then produced
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through the addition of hydrobromic acid (HBr) and hydrogen peroxide (H2O2). This experiment was a greener bromination of stilbene because bromine was generated in situ and ethanol was used as the solvent. The melting point (243.30°C)‚ mass (.427g)‚ and percent yield (45.54) of the crystals were recorded. The FTIR was used to confirm that the product was produced. The peaks on the HNMR revealed the presence of aliphatic and aromatic hydrogens and were used to verify the identity of the product
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through three features. The first is a loss of oxygen from a bond or loss of a bond to oxygen as in the case of carbon-oxygen double bond to a carbon-oxygen single bond. The second is the addition of hydrogen to a bond and thirdly‚ the replacement of a more electronegative atom with carbon or hydrogen. In redox reactions‚ the reductant (or reducing agent) loses electrons and is oxidized while the oxidant (or oxidizing agent) gains electrons and is reduced. The reducing agent transfers electrons to
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February‚ 2011 Due Date: 9th February‚ 2011 Title: Analysis of the Elements present in Organic Compounds Aims: To test the presence of Carbon‚ Hydrogen‚ Oxygen‚ Nitrogen and Sulfur in Organic Compounds Introduction: Organic Compounds can be considered as any compound containing carbon atoms covalently bonded with other atoms‚ usually hydrogen. Other atoms may include oxygen‚ nitrogen‚ sulfur…etc. They can be found in nature‚ since “organic” means present in‚ or derived from‚ plants and animals
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water molecule consists of two hydrogen atoms and an oxygen atom‚ the oxygen atom has a partial negative charge‚ whereas the two hydrogen atoms have a slight positive charge. So‚ when water molecules are close together‚ their positive and negative regions are attracted to the oppositely-charged regions of nearby molecules‚ the attraction is called a hydrogen bond. Each water molecule can be hydrogen bonded to four others‚ because it can accept two and donate two hydrogen atoms. The fact that water is
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