Chemistry

A hot pot of water is set on the counter to cool. After a few minutes it has lost 495 J of heat energy. How much heat energy has the surrounding air gained? _____unit_____
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The reversible reaction 2H2 CO CH3OH heat is carried out by mixing carbon monoxide and hydrogen gases is a closed vessel under high pressure with a suitable catalyst . After equilibrium is established at high temperature and pressure, all three substances are present. If the pressure on the system is lower, with the temperature kept constant, what will be the result
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The Lewis dot model of a molecule is shown.Based on the model, which of the following is true? Each carbon has three lone pairs of electrons on it. The octet of carbon atom remains incomplete in the molecule. The two carbon atoms share a total of six electrons with each other. The difference between the electronegativity of carbon and hydrogen is greater than 1.7.
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whats the name of the organic molecule
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what is the material used to make plaster of paris?
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Precipitate WILL form if Silver Nitrate reacts with Iron (III) chloride-true or false
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Which statement describes a condensation reaction? A. monomers break away when one forms a double bond monomers break away with the addition of a water molecule. B. Two monomers combine when one adds to the double bond of another. C. Two monomers form a new bond with the loss of a water molecule .
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PLZ HELP ME WITH MY WORK
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Choose all the answers that apply.Nitrogen has an atomic number of 7. Its atomic mass is 14. Nitrogen has _____.seven electronsseven neutronsseven electron shells23 neutrons14 electronsPlease help (:
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If Sterling silver is 90.0% silver and 10.0% copper, what is the maximum amount of Sterling silver that can be made if you have 48.3 grams of silver metal and an unlimited amount of copper
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Lewis Structures are used to describe the covalent bonding in molecules and ions. Draw a Lewis structure for NO3- and answer the following questions based on your drawing. 1. For the central nitrogen atom: The number of lone pairs = ________The number of single bonds=_______ The number of double bonds= ______2. The central nitrogen atom :
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an atom with six protons and eight neutrons is a(n)___a. isotope of nitrogenb. standard carbon atom c. isotope of carbon d. isotope of oxygen
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Hydrogen fluoride will react with glass (silicon dioxide. S_iO_2) according to the equation below What mass of HF is required to react completely with 16 0 g of glass? (Molar masses; Si 28 09 g/mol F 19 00 g/mol H. 1.01 g/mol O, 16.00 g/mol]4HF(g) + SiO_2(s) --> SiF_4(g) + 2H_2O(g)A. 5.33 gB. 21.3 gC. 64.0 gD. 80.0 gE. 320 g
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plzzz guys help it urgent
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why is it difficult to undergo nucleophilic substitution in haloarene?
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The seedlings that we planted on the newspaper cuttings or cotton wool did not grow very well at all, even though they had sunlight and water. What could they not get from the newspaper or cotton wool that plants normally get from soil?
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Of these gases, which has the fastest-moving molecules (on average) at a given temperature?-N2-They all have the same average speed.-Cl2-HClWhich gas molecules have the highest average kinetic energy at a given temperature?-They all have the same average kinetic energy.-Cl2-HCl-N2
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write the chemistry of Epsom salt
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6) Hydrogen gas can be generated from the reaction between aluminum metal and hydrochloric acid:2 Al(s) + 6 HCl(aq) + 2 AICI3, (aq) + 3 H2(g)a. Suppose that 3.00 grams of Al are mixed with excess acid. If the hydrogen gas produced is directly collectedinto a 850 mL glass flask at 24.0 C, what is the pressure inside the flask (in atm)?b. This hydrogen gas is then completely transferred from the flask to a balloon. To what volume (in L) will theballoon inflate under STP conditions?c. Suppose the balloon is released and rises up to an altitude where the temperature is 11.2 C and the pressure is438 mm Hg. What is the new volume of the balloon (in L)?
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When hydrogen gas reacts with oxygen gas, water vapour is formed according to thereaction 2H2 + O2 2H2O. If 3.00 mol of hydrogen gas react with 3.00 molof oxygen gas, which reactant will be the reactant in excess?
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Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. In the first step, nitrogen and hydrogen react to form ammonia: N2 (g) + 3H2 (g) 2NH3 (g) =H92.kJ In the second step, ammonia and oxygen react to form nitric acid and water: NH3 (g) + 2O2 (g) HNO3 (g) + H2O (g) =H330.kJ Required:Calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions.
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difference Between phenol and dettol
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pentanitrogen heptachloride formula
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hii pls help me to balance the equation and state the symbols thanksss
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