Description : An organic compound contain 69% carbon and 4.8% hydrogen, the remaining being oxygen. Calculate the masses of carbon dioxide and water produced when 0.20g of this substance is subjected to complete combustion.
Last Answer : Calculation of mass of CO2 produced: Mass of compound =0.20g %C =12 x C 69=12*mass of CO2 formed*100/44*0.2 Mass of CO2 formed =69*44*.2/12*100 = 0.506g Similarly, % H =2* mass of H2Oformed*100/18* ... compound 4.8=2* mass of H2Oformed*100/18* 0.2 Mass of H2Oformed =4.8*18*0.2/2*100 =0.0864g
Description : How is compound made from hydrogen and oxygen different from these mixtures of these two elements?
Last Answer : In a compound chemical elements are linked by chemical bonds.
Description : If water sample are taken from sea, rivers or lake, they will be found to contain hydrogen and oxygen in the approximate ratio 1 : 8. This indicates t
Last Answer : If water sample are taken from sea, rivers or lake, they will be found to contain hydrogen ... proportion C. Reciprocal proportions D. None of these
Description : Hydrogen is not found in atmosphere because – (1) it is highly inflammable (2) it is the lightest gas (3) it is absorbed by plants (4) it immediately combines with oxygen to form water
Last Answer : (2) it is the lightest gas Explanation: Hydrogen is a chemical element with symbol H and atomic number 1. With an average atomic weight of 1.00794 u (1.007825 u for hydrogen-1), hydrogen ... hydrogen in its plasma state. Air is the name given to the atmosphere used in breathing and photosynthesis.
Description : Hydrogen is not found in atmosphere because (1) it is highly inflammable (2) it is the lightest gas (3) it is absorbed by plants (4) it immediately combines with oxygen to form water
Last Answer : it is the lightest gas
Description : What did the scientist say to the hydrogen atom that claimed to have lost the electron?
Last Answer : The scientist said "Are you positive"
Description : Which scientist prepares organic compound urea by heating inorganic compound ammonium cyanate ?
Last Answer : Friedrich Voller.
Description : Hydrogen and Oxygen Found by Hydroelectric Analysis What is the change ?
Last Answer : Hydrogen and oxygen were obtained by electrolysis of water. This is a chemical change.
Description : In certain amino acids, which elements is found in addition to carbon, hydrogen, nitrogen and oxygen?
Last Answer : Sulphur
Description : On analysis, a certain compound was found to contain 254 g of iodine (at. Mass 127) and 80 g oxygen (at. Mass 16). What is the formula of the compound
Last Answer : On analysis, a certain compound was found to contain 254 g of iodine (at. Mass 127) and 80 g oxygen (at. Mass 16). ... C. `I_(5)O_(3)` D. `I_(2)O_(5)`
Description : The element least likely to be found in an organic compound is (a) oxygen (b) sulfur (c) nitrogen (d) silicon
Last Answer : silicon
Description : Rate of evaporation of petrol is greater than that of water at room temperature because: A. petrol molecules do not have any hydrogen bond (Answer) B. petrol is an organic compound C. water molecules have small size D. petrol molecules have greater size
Last Answer : A. petrol molecules do not have any hydrogen bond (Answer)
Description : Which of the following is true when HCL is passed through water. (i) It does not ionize in the solution as it is a covalent compound (ii) It ionizes in the solution (iii) It gives both hydrogen and hydroxyl ions in the solution ... ) (i) only (b) (iii) only (c) (ii) and (iv) only (d) (iii) and (iv)
Last Answer : (c) (ii) and (iv) only
Description : Can anyone point to any article or paper, etc. where scientist or biologist have found a true bona fide homosexual animal?
Last Answer : answer:I haven't read through all of these papers in any detail, but these are scientific sources that discuss homosexual activity amongst animals. Rams. http://www.sciencedirect.com/science/ ... dolphins participating in homosexual behaviour but I can't find a scientific source, only news sources.
Description : One day, a scientist was down in his personal lab. It was around 11 o'clock. He was working late on poisons and their antidotes. He was hungry, so he went to get a snack. Suddenly, he found ... and pink colored poisons in his lab. All of them were deadly. Which one did the scientist choose? -Riddles
Last Answer : The white one, since sugar is known as 'White Poison'.
Description : Evolutionarily protochordates may be intermediate animals between invertebrates and vertebrates. Imagine a scientist is testing the hypothesis that vertebrates evolved from echinoderms. Having as research object a newly ... the hypothesis? What is an example of a discovery that would strengthen it?
Last Answer : Hypothesis to be tested: Vertebrates evolved from echinoderms. Testing material: A newly found protochordate species (i.e., a vertebrate forerunner). Example of weakening observation (that ... shows how science works, beginning with the placement of hypothesis and further observational testing.)
Description : In 1866, John Newlands, an English scientist, arranged the then known elements in the order of increasing atomic masses. He found that every eighth element had properties similar to that of the first. He called it ... of Pentamates (2) Law of musical notes (3) Law of Octaves (4) None of the above
Last Answer : (3) Law of Octaves Explanation: Newlands compared his discovery to the octaves found in music and thus, he called it the ‘Law of Octaves’. It is also known as ‘Newlands’ Law of Octaves’.
Description : What is the process of using electricity to separate water into hydrogen and oxygen called?
Last Answer : A: Electrolysis.
Description : The atmosphere of the primitive earth before origin of life consisted of: (a) Nitrogen, Oxygen, Ammonia, and Water vapour (b) Methane, Ammonia, Hydrogen, and Water vapour (c) Nitrogen, Oxygen, Water, and Carbon dioxide (d) Ammonia, Water, Oxygen, and Hydrogen
Last Answer : Ans:(b)
Description : Compound of Nitrogen and Hydrogen is?
Last Answer : Ammonia
Description : How would one combine the gasses oxygen and hydrogen to form water?
Last Answer : Well, I know it would be two parts hydrogen to one part oxygen, but how the process actually occurs, I can’t tell you.
Description : Oxygen is very flammable. Hydrogen is even more so. So why doesn't water burn?
Last Answer : Because there’s no carbon apparently. Huh. http://blogs.howstuffworks.com/2009/08/11/why-doesnt-water-burn/
Description : What is the ratio of hydrogen to oxygen in water ?
Last Answer : The ratio of hydrogen to oxygen in water is 2: 1
Last Answer : In water Oxygen, Of hydrogen Ratio 1 : 2
Description : 10 g of hydrogen and 64 g of oxygen were filled in a steed vessel and exploded. Amount of water produced in this reaction will be :-
Last Answer : 10 g of hydrogen and 64 g of oxygen were filled in a steed vessel and exploded. Amount of water produced in ... mole B. 3 mole C. 4 mole D. 1 mole
Description : Why does it takes several redox reactions in a cell to water from hydrogen and oxygen?
Last Answer : hydrogen and oxygen combine explosively in a single reaction
Description : What data does a sample of pure water irrespective of its source contains 11.1 hydrogen and 88.9 oxygen support?
Last Answer : It might have supported Proust's law or the law of definitecomposition, or law of constant composition. But unfortunately thedata used are not accurate. The correct proportions, based onrelative atomic masses of hydrogen and oxygen being 1.008 and15.999 give the results as 11.2% and 88.8%.
Description : What is the Ratio of hydrogen to oxygen in water by volume is?
Last Answer : The ratio is 2:1.. There are two Hydrogen atoms for every Oxygenatom in a water molecule.
Description : What kind of bond is formed when the attraction between the hydrogen atom in one water molecule and the oxygen molecule in another?
Last Answer : Feel Free to Answer
Description : When adding electric energy to water molecules can it cause the bonds between Hydrogen and oxygen to break?
Last Answer : What is the answer ?
Description : In the water molecule are electrons are equally shared by hydrogen atoms and oxygen atoms?
Description : What are the differences in the properties of water hydrogen and oxygen?
Description : What chemical reaction is toxic hydrogen peroxide will spontaneously break down into water and oxygen?
Last Answer : The chemical reaction is:2 H2O2 = 2 H2O + O2
Description : What is the most abundant gas in our atmosphere oxygen hydrogen nitrogen water?
Last Answer : It is nitrogen, followed by oxygen.
Description : Hydrogen peroxide is an effective sterilizing agent. Which one of the following product results when it readily loses active oxygen? (1) Nascent Hydrogen (2) Water (3) Hydrogen (4) Ozone
Last Answer : (2) Water Explanation: Hydrogen peroxide (H2O2) is a water molecule with an extra oxygen atom. It is very unstable and breaks down readily into water and a single oxygen molecule. So in nutshell, when Hydrogen peroxide readily loses active oxygen, Water is formed.
Description : In an acid base reaction which product is produced along with a salt? (1) Hydrogen gas (2) Oxygen gas (3) Carbon dioxide (4) Water
Last Answer : (4) Water Explanation: When an acid and a base are placed together, they read to neutralize the acid and base properties, producing a salt. The H(+) cation of the acid combines with the OH(-) anion of the base to form water.
Description : Heavy water is so called because it contains - (1) Heavy isotope of hydrogen (2) Heavy isotope of oxygen (3) Mole number of hydrogen atoms (4) Mole number of oxygen atoms
Last Answer : (1) Heavy isotope of hydrogen Explanation: Heavy water, formally called deuterium oxide, is a form of "water that contains a larger than normal amount of the hydrogen isotope deuterium, (also known as ... ) rather than the common hydrogen-1 isotope that makes up most of the hydrogen in normal water.
Description : A gas used as a disinfectant in drinking water is - (1) Hydrogen (2) Oxygen (3) Fluorine (4) Chlorine
Last Answer : (4) Chlorine Explanation: Water chlorination is the process of adding chlorine or chlorine compounds such as sodium hypochlorite to water.
Description : Pick up the correct statement from the following: A. Hydrogen sulphide gas in excess, may cause corrosion of concrete sewers B. 4 ppm of Dissolved Oxygen (D.O.) is ensured before discharging the treated ... river C. Solubility of oxygen in sewage is 95% of that of distilled water D. All the above
Last Answer : ANS: D
Description : According to Oparin, which one of the following was not present in the primitive atmosphere of the earth? (a) Methane (b) Oxygen (c) Hydrogen (d) Water vapour
Last Answer : b) Oxygen
Description : The high boiling points of alcohols, as compared to the corresponding alkanes, are due to (a) Hydrogen bonding (b) Heavy oxygen atom (c) Water solubility (d) None of these
Last Answer : Hydrogen bonding
Description : Water contains (A) One hydrogen atom and one oxygen atom (B) Two hydrogen atoms and one oxygen atom (C) One hydrogen atom and two oxygen atoms D) Three hydrogen atoms and two oxygen atoms
Last Answer : Answer: Option B
Description : Water consists of hydrogen and oxygen by weight in the ratio?
Last Answer : 1:8.
Description : The residual product discharged by the hydrogen-oxygen cell is ____________ a) Hydrogen peroxide b) Alcohol c) Water d) Potassium permanganate
Last Answer : c) Water
Description : Carbohydrates are composed of ____ and ____. a. carbon, water c. zinc, aluminum b. hydrogen, oxygen d. gold, calcium
Last Answer : a. carbon, water
Description : If 16 grams of oxygen are produced by the electrolysis of water, how many grams of hydrogen are produced at the same time?
Last Answer : ANSWER: 2 GRAMS
Description : Which of the following gases cannot be collected by water displacement? w) Nitrogen x) Oxygen y) Hydrogen z) Hydrogen Chloride
Last Answer : ANSWER: Z -- HYDROGEN CHLORIDE
Description : Of the following, which is a basic need of all living things? a) oxygen gas b) light c) hydrogen gas d) water
Last Answer : ANSWER: D -- WATER
Description : In the first stage of photosynthesis, light energy splits water molecules leaving a by-product which is released. This byproduct is: a) hydrogen b) carbon dioxide c) oxygen d) methane
Last Answer : ANSWER: C -- oxygen