Kelvin of 1.0 dm3 of an ideal gas is doubled and its pressure is tripled. What is the final volume of the gas in dm3? A. B. C. D. 5. What volume of 0.500 mol dm–3 sulfuric acid solution is required to react completely with 10.0 g of calcium carbonate according to the equation below? CaCO3(s) + H2SO4(aq) CaSO4(aq) + H2O(l) + CO2(g) A. 100 cm3 B. 200 cm3 C. 300 cm3 D. 400 cm3 6. What volume‚ in cm3‚ of 0.200 mol dm–3 HCl(aq) is required to neutralize 25.0 cm3 of 0.200 mol dm–3 Ba(OH)2(aq)
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Name: Soo Jin Park Date: 03/30/2015 Exp 4: Properties of Gases Lab Section: 73426 Data Tables: Hydrogen Step B: Describe the zinc and acid reaction. As placing a small piece of Zn(mossy zinc) metal into the test tube containing the diluted HCI(Hydrochloric Acid) solution‚ gas bubbles rose from the solution slowly at the beginning and vigorously in process of time. As this reaction continued for a long time‚ transparent solution turned into white opaque color and black precipitates were formed
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Sugar (Sucrose)- C12H22O11 Vitamin C (Ascorbic Acid)- C6H8O6 Aspirin (Acetylsalicylic Acid)- C9H8O4 Common Name | Chemical Name | acetone | dimethyl ketone; 2-propanone (usually known as acetone) | acid potassium sulfate | potassium bisulfate - used in the conversion of tartrates to bitartrates in wine. | acid of sugar | oxalic acid – used in cleaning or bleaching‚ especially for the removal of rust (iron complexing agent) | ackey | nitric acid | alcali volatil | ammonium
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1. Provides framework that supports and protects other body tissues 2. Forms a system of rigid levers that can be moved by forces from attaching muscles • Major building blocks of bones 1. calcium carbonate- 60 to 70 percent of dry bone weight 2. Calcium phosphate- 60 to 70 percent of dry bone weight 3. Collagen 4. Water- 25 to 30 percent of bone weight • The building blocks gives stiffness and are determinants of compressive strength • Collagen
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water and oxygen 7. Ammonia combines wuth oxygen to get nitrogen oxide and water 8. Aluminium oxide combines with sodium to form aluminium and sodium oxide 9. Calcium chloride reacts with water to give calcium hydroxide and hydrogen chloride 10. Sodium hydroxide reacts with carbondioxide forming sodium carbonate and water Maths : If you want you can do this or search in google for different methods OBJECTIVE:- To verify the Pythagoras theorem by method of Paper Folding‚ Cutting
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KNO3(s) + AgI(aq) Potassium iodide has very low risks‚ so there is no worry that this was found in the soil sample. I identified that unknown sample D is calcium chloride. It produced a red flame during the flame test which narrowed it down to be either calcium or lithium. However‚ the sodium hydroxide test supported that it was actually calcium‚ as a white precipitate was formed during this test. The chemical equation for this test is: CaCl2(aq) + NaOH(aq) Ca(OH)2(s) + NaCl(aq) I identified it
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Part II: Decomposition of hydrogen peroxide 1. Write the balanced equation for the breakdown of hydrogen peroxide. 2H2O2 —> 2H2O + O2 2. Write a balanced equation for another decomposition reaction. Decomposition for copper carbonate: CuCO3 → CuO + CO2 Part III: Reaction between zinc and acetic acid 1. Write the balanced equation for the reaction between zinc and acetic acid. Zn(s) + 2CH3COOH(aq) —> Zn(OOCCH3)2(aq) + H2(g) 2. Classify the reaction between
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rows A through E: cobalt (II) nitrate‚ copper (II) nitrate‚ iron (III) nitrate‚ barium nitrate‚ and nickel (II) nitrate. Afterward‚ two drops of each of sodium phosphate‚ sodium iodide‚ sodium sulfate‚ sodium chloride‚ sodium bicarbonate‚ sodium carbonate and sodium hydroxide were added to the five vertical wells under columns 1-7. |cobalt(II)nitrate|copper(II)nitrate|iron(III)nitrate|barium nitrate|nickel(II)nitrate| sodium phosphate|Precipitated a purple color|Precipitated a light blue color|Precipitated
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b) scurvy c) anemia d) night blindness 6.Which one of the following is reducing sugar? a) glucose b) maltose c) sucrose d) starch 7.Buildings are being damaged by acid rain because it attacks a) Calcium sulphate b) Calcium nitrate c) Calcium carbonate d) Calcium oxalate 8.Which one of the following salts makes water permanently hard a) Na CO b) NaHCo c) Ca(HCO ) d) CaSO 9.Concentration of the copper one is carried out by a) calcination b) roasting c) froth
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nutritional chemistry red tomatoes raw nutritional value per 100 gm (3.5 oz) contains 20 kcal‚ carbohydrate - 4 gm‚ sugar – 2.6 gm‚ dietary fibre – 1 gm‚ fat – 0.2 gm‚ protein – 1 gm‚ water – 95 gm‚ vitamin C – 13 gm. It also contains minerals like calcium – 48 gm‚ phosphorous 20 –gm‚ iron – 0.4 gm‚ small amount of vitamin B complex. The tomato is essentially an alkaline vegetable‚ its acid taste is due to malic acid which is about 0.5% it also contains 0.52& to 1.81 citric acid and only a trace of
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