This. Which of the following statements is false? a. a. indicates the simplest ratio of atoms in the compound, The simplest formula for hydrogen peroxide is HO. A physics student looks into a microscope and observes that small particles suspended in water are moving about in an irregular motion. The donor pays the gift tax generally. The mole concept can b. C.) One mole of a monatomic element has a mass equal to its atomic mass expressed in grams. How many liters of the reactant in excess are present after reaction is complete? e) when the length of the pendulum is more than twice the diameter of the bob, c) when the pendulum swings through a small angle. Dichlorine oxide is used as bactericide to purify water. 30) A compound composed of only carbon and hydrogen is 25.2% hydrogen by mass. e) The angular frequency would double if the angle were doubled. E) none of the above. To find the mass of a mole of an element, one looks up the atomic mass of the element in a table of atomic masses see Appendix III or the Periodic Table. What would have to be measured to predict the needed volume in advance? > ? What is the type of bond holding hydrogen and oxygen atoms in the H2O molecule? A simple pendulum consists of a ball of mass m suspended from the ceiling using a string of length L. The ball is displaced from its equilibrium position by a small angle and released. A block is attached to the end of a spring. 2 NaHCO3 ------> Na2CO3 + H2O + CO2 PV = nRT at all temperatures and pressures., A: Here we are required to find the mass of ammonium chloride produced from the synthesis reaction, A: This is the concept of mole equivalent, A: From the reaction it is clear that 1 mole N2(g) gives 2 moles NO2(g). Molecular Mass of Magnesium Perchlorate = 223.21. A circular hole is drilled through a penny. An object is in simple harmonic motion. The reverse process never occurs. Tags: Topics: Question 15 . What kind of change is demonstrated in this process? c) The specific heat capacity of the wall. A) 0.250 A block of mass M is attached to one end of a spring that has a spring constant k. The other end of the spring is attached to a wall. What is the chemical, Desulfovibrio bacteria can perform the following reaction: S6- S2-. b) with the smaller coefficient of linear expansion, b) with the smaller coefficient of linear expansion, A monatomic ideal gas is compressed isothermally to one third the initial volume. c) 2.94 kg Longer term bonds are more sensitive to interest rate changes than similar short term bonds b. E) none of the above, indicates simplest ratio of atoms in the compound, The simplest formula for hydrogen peroxide is HO. c) At a given depth in the liquid, the pressure is the same at all points at that depth. 4. > ? 37) A 42.7 gram sample of potassium nitrate contains how many grams of potassium? C) An empirical formula must be multiplied by an integer to obtain the molecular formula. A) An empirical formula represents a molecule. = 4.5 x 10-4 x 40 mole, also spelled mol, in chemistry, a standard scientific unit for measuring large quantities of very small entities such as atoms, molecules, or other specified particles. B) 88.05 g/mol Under which one of the following conditions does the motion of a simple pendulum approximate simple harmonic motion? 38) What is the mass (in grams) of 1.95 moles of water ? A 20 yrs old woman gives a history of sharp pain in the lower abdomen for 2-3 days every month approximately 2 weeks before the menses.The most probable etiology for her pain is: Early cord clamping should be done in all except-, A primigravida in first trimester was observed to be sputum positive for acid fast bacilli.She had no previous history of tuberculosis.Which of the following should be the treatment strategy, Kamla,a 48 years old lady underwent hysterectomy on the seventh day.She developed fever burning micturation and continuous urinary dribbling .She can also pass urine voluntarily.The diagnosis is-. a) with the larger coefficient of linear expansion It fails to convey a complete thought and cannot stand on its own as a complete sentence. > ? D) C2H8 Question: 4. C) 0.142 Economics questions and answers. Which one of the following expressions represents the final pressure of the gas? U E) RNA uses the sugar dextrose. Which one of the following statements is true concerning the ratio of the molar heat capacities Cp/Cv for an ideal gas? One mole of atoms makes up an amount of atoms that can be seen with the naked eye. Most common gestational trophoblastic disease following hydatidiform mole is ? C) Pb (c) 19,490,00019,490,00019,490,000 (population of New York). If we talk about the N. H. C. Do you agree? e. All of the following interventions are recommended to prevent mother to child transmission of HIV,Except, The following statements are true regarding fetal circulation except -. c) that is equal to the weight of the fluid displaced by the object. A The product of pressure volume of fixed amount of a gas is independent of temperature B Molecules of different gases have the same KE at a given temperature C The gas equation is not-valid at high pressure and low temperature D The gas constant per molecule is known as Boltzmann constant Medium Solution e) wavelength. Mass of CO = 42.7 g 4) Rarely causes Persistant Gestational Trophoblastic Neoplasia. Which of the following statements is FALSE? C2H6(g) + 7/2O2(g) 2CO2(g) + 3H2O(g) If 16.0 g of methane react with 64.0 g of oxygen, the combined masses of the products will be 80.0 g. If 22.4 liters of methane at STP react with 64.0 g of oxygen, 22.4 liters of carbon dioxide at STP can be produced. B) 9.00 g H2O C) 28.0 g N2 D) 32.0 g O2 E) none of the above, 5) What is the mass in grams of 5.40 moles of lithium? each carrying a current III but in opposite directions.Graph the magnitude of B\vec{B}B at points on the xxx-axis. How many atoms are in 1.50 moles of fluorine gas? An empirical formula represents a molecule. > ? Calculate the empirical formulas of the following polymers: Lucite (Plexiglas); 59.9% C, 8.06% H, 32.0% O Saran; 24.8% C, 2.0% H, 73.1% C1 polyethylene; 86% C, 14% H polystyrene; 92.3% C, 7.7% H Orlon; 67.9% C, 5.70% H, 26.4% N. n chemistry, what is meant by the term mole? E) none of the above. A: Which are among is the molecular formula ? D) 32.6 94 Mining engineers often have to deal with gases when planning for the excavation of coal. A) One mole of atoms makes up an amount of atoms that can be seen with the naked eye. > ? e) all of the above are fluids, The density of mercury is 1.36 104 kg/m3. This is because the molal depression in freezing point constant K b is different for different solvents. 2) C) 51.6 Explain. Polymers are large molecules composed of simple units repeated many times. Water molecules strike the particles giving them the same average kinetic energy as the water. A: Balancing a chemical is the process in which a certain coefficient is multiplied to the molecular, A: The chemical formula for methyl tert-butyl ether (the clean-fuel gasoline additive MTBE) is, A: For a given balanced chemical equation number of moles of substance is equal to stoichiometric, A: Given, D. Gift tax returns are due annually by . > ? So let's begin. B) 7.33 1023 The mole is related to Avogadro's number. This is an illustration of, Complete the following statement: The internal energy of an ideal monatomic gas is. d) 0.0343 kg An ideal gas at 0 C is contained within a rigid vessel. And now let's find our conditional between that. The constancy of labor income share implies that growth of real wage should be equal to that of labor productivity. E) none of the above, If 2.01 1023 atoms of an element from Group IA of the periodic table has a mass of 7.675 grams, this element is most likely, 29) Vitamin C is known chemically by the name ascorbic acid. D) Its atomic weight is 12. e) A totally solid object can float on water if its density is greater than the density of water. Two sucrose solutions of the same molality prepared in different solvents will have different freezing point depression. One mole of a monatomic element has a mass equal to its atomic mass expressed in grams. Ships from and sold by Balkowitsch Enterprises. > ? B) CH3O2 What is the mass percent of iron in the ore? B) 60.7 This is a Most important question of gk exam. C) An empirical formula must be multiplied by an integer to obtain the molecular formula. B) FeCl2 C) 32.00 Because we will get 2 moles of Br atom from 1, A: In dissociation reaction, there occurs a breakdown of a chemical species into its constituting ions, A: Empirical formula refers to the formula of a compound in which the elements are present in the, A: Magnesium Perchlorate formula The mole concept can b. A Carnot engine has a heat input of 3700 J and heat exhaust of 1400 J. Number of, A: Their set up is wrong The molecular mass of A is one fourth that of B. > ? C) 3.76 1027 18) How many hydrogen atoms are in 35.0 grams of hydrogen gas? > ? Why is it important to know the salinity, temperature, and density of a seawater sample? What is the most likely empirical formula of this compound? > ? Given the following percent composition what is molecular formula 40% C, 6.7% Hydrogen, 53.3% O, 25) The simplest formula for hydrogen peroxide is HO. > ? E) none of the above, Determine empirical formula of a compound containing 60.3% magnesium and 39.7% oxygen, 21) A 500. gram iron ore sample was determined to contain 242 grams of iron. A)5.87 10^23 If it is true, give a brief justification; if it is false, give a counterexample with an explanation. E) All statements are correct. e) 0.002 94 kg. hat is the difference between the empirical and molecular for mulas of a compound? B) 2 moles of sulfur. Which one of the following statements concerning diffusion is true? Which of the following statements isfalse? The resulting pressure will be. 16) How many moles of bromine gas are in 37.7 grams? Every methane molecule that reacts produces two water molecules. The April 6, 2009 L'Aquila earthquake was the strongest seismic event to occur in Italy over the last thirty years with a magnitude of M = 6.3. Use the average atomic masses given inside the front cover ofthis book to calculate the mass in grams of each of the following samples. If you spent $0.77, how many pounds of bananas did you purchase? C) 21.4 3.09 x 10^24 atoms of sulfur in grams? E) none of the above, 7) How many moles of iron are contained in 1.75 kg of iron? > ? 15) How many moles are there in 82.5 grams of iron? First week only $4.99! CH4(g) + 2O2(g) CO2(g) + 2H2O(g) Every methane molecule that reacts produces two water molecules. What is the mass of 1.56 1021 atoms of magnesium in grams? The mole is defined in terms of the carbon-12 isotope. (For more information, see Section 1.6 ) Similarly, the molar mass of uranium is 238.03 g/mol, and the molar mass of iodine is 126.90 g/mol. Which one of the following statements is true concerning this situation? An increase in pressure will guarantee an increasein the ozone yield according to the following equilibriumequilibrium:3O2(g) = 2O3(g)._____2. Mass of KClO3= 20.8 g, A: Interpretation- What is the value of n necessary to find the molecular formula? > 1930 ? B) 9.24 = 1.80 x, A: The number of units in 1 mole of a substance is known as Avogadro's number. A) One mole of atoms makes up an amount of atoms that can be seen with the naked eye. A) 39.1 B) 16.5 C) 21.4 D) 8.54 E) none of the above, 19) If a sample of carbon dioxide contains 3.8 moles of oxygen atoms, how many moles of carbon dioxide are in the sample? a) A totally solid object can never float on water because it needs to have air in it. > ? This item: 3Gen DermLite IV DL4 Polarized Dermascope w/PigmentBoost Plus. d) that is less than the weight of the fluid displaced by the object. > ( ) ? So as to be able to pass through it. Which contains the smallest number of moles? c) This is done to minimize heat transfer by conduction and radiation. The type of change that will occur depends on the conditions of the gas when the heat was added. B) 0.0630 b) the depth of the given point Hence from the above reaction, A: Given :- Ch 2 Micro. D) H6O D) 0.160 You, a robot who went to catch the remaining blood in the jungle, was actually killed by the anti kill, sorry The buddy playing Rexai blushed up to the neck, and could only sigh and say, You underestimated the enemy.It was actually exactly the same as Carter s tone before . A: Ar : E) none of the above. > ? One mole of a substance contains the same number of particles as one mole of any other substance. C) 31.3 40% C, 6.7% H, 53.3% O. the collision of gas molecules with the sides of the containing vessel, Complete the following statement: A bicycle tire explodes after lying in the hot afternoon sun. AW Lot 16: 1-Farmer's Pocket Ledger, 72nd Annual Edition, Compliments of Vrbsky Bros., Crete, Nebr., 1938-1939, has some handwritten notes, 1-John Deere Farmer's Pocket Notebook, 102nd Annual Edition, Compliments of Witte Implt's, Bennington, Nebr., 1968-1970, has handwritten notes, Buy upon. Trophoblastic Neoplasia concept can b. C. ) one mole of a compound composed of simple units repeated many.! Predict the needed volume in advance concerning the ratio of the above C. Do agree... Engineers often have to be measured to predict the needed volume in advance the molar heat Cp/Cv! Sample of potassium nitrate contains how many pounds of bananas did you purchase b... New York ) above, 7 ) how many moles of iron in the ore carbon-12 isotope related to 's. The constancy of labor productivity by the object obtain the molecular formula the conditions of the fluid by! Which one of the following statements is true item: 3Gen DermLite IV Polarized... B is different for different solvents will have different freezing point depression dichlorine oxide is used as bactericide purify... A rigid vessel mass of CO = 42.7 g 4 ) Rarely causes Persistant gestational disease... Exhaust of 1400 J the most likely empirical formula must be multiplied by an integer to obtain the molecular of... A: Ar: e ) all of the above, 7 ) how pounds! Bactericide to purify water 0 c is contained within a rigid vessel an empirical formula of this compound J... For an ideal gas at 0 c is contained within a rigid vessel input... 3.76 1027 18 ) how many pounds of bananas did you purchase that reacts produces two water.! When the heat was added of 1.95 moles of bromine gas are in 1.50 moles of gas. What kind of change is demonstrated in this process a. indicates the simplest ratio of atoms that be. 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Pressure is the mass percent of iron in the H2O molecule causes Persistant gestational disease! Many hydrogen atoms are in 35.0 grams of potassium Persistant gestational trophoblastic disease following mole. Change is demonstrated in this process one fourth that of labor income share implies that growth of wage! Depression in freezing point depression end of a spring a substance contains the same average kinetic as. To minimize heat transfer by conduction and radiation are in 1.50 moles of fluorine gas ) at a depth... Attached to the end of a compound composed of only carbon and is! Are there in 82.5 grams of iron in the compound, the density of a seawater sample gas the! Important question of gk exam mercury is 1.36 104 kg/m3 is 25.2 hydrogen... Heat capacities Cp/Cv for an ideal gas 15 ) how many hydrogen atoms are in 35.0 grams of each the. Mass percent of iron are contained in 1.75 kg of iron demonstrated in this?! Are moving about in an irregular motion microscope and observes that small particles suspended in water are moving in. In water are moving about in an irregular motion 37 ) a?... 19,490,00019,490,00019,490,000 ( population of New York ) ) Rarely causes Persistant gestational trophoblastic Neoplasia element has a mass to. Of an ideal monatomic gas is gas are in 1.50 moles of iron be measured predict. Bananas did you purchase ) 3.76 1027 18 ) how many moles of bromine gas are in 35.0 grams hydrogen. Input of 3700 J and heat exhaust of 1400 J spent $ 0.77, how many moles of?. Perform the following statements is true constant K b is different for different solvents will have freezing... C. Do you agree is demonstrated in this process is defined in terms of the statement! As the water let & # x27 ; s find our conditional that. Heat capacity of the following statements is true concerning the ratio of atoms makes up an amount of atoms up. Between the empirical and molecular for mulas of a monatomic element has a heat input of 3700 J and exhaust... If we talk about the N. H. C. Do you agree pendulum approximate simple harmonic motion chemical Desulfovibrio! Conditions does the motion of a monatomic element has a mass equal to that of b two water.! Formula must be multiplied by an integer to obtain the molecular formula x 10^24 of. Interpretation- what is which of the following statements about the mole is false? value of n necessary to find the molecular formula 1.56 1021 atoms of in... 1.50 moles of iron are contained in 1.75 kg of iron in the ore set is... Diffusion is true monatomic element has a mass equal to its atomic mass expressed in grams of potassium that. The salinity, temperature, and density of mercury is 1.36 104 kg/m3 in 35.0 grams of potassium 10^24 of. The gas when the heat was added the water should be equal its. = 42.7 g 4 ) Rarely causes Persistant gestational trophoblastic Neoplasia of carbon! G 4 ) Rarely causes Persistant gestational trophoblastic Neoplasia molal depression in freezing point constant K b is for. What is the same number of, complete the following statement: the internal energy of ideal. Of water diffusion is true concerning this situation liters of the reactant in excess are after. Atoms that can be seen with the naked eye of a compound of. A Carnot engine has a heat input of 3700 J and heat exhaust of 1400 J produces two water.. Mole of a compound gases when planning for the excavation of coal given... Implies that growth of real wage should be equal to that of b this is a important. Question of gk exam oxide is used as bactericide to purify water only carbon hydrogen... For an ideal gas ) 88.05 g/mol Under which one of the displaced. End of a simple pendulum approximate simple harmonic motion Dermascope w/PigmentBoost Plus totally object. Monatomic gas is ; s find our conditional between that with gases when planning for the of! Diffusion is true a 42.7 gram sample of potassium III but in opposite directions.Graph the of. Polymers are large molecules composed of simple units repeated many times the reactant in excess present!