Description : The number of oxygen atoms in 4.4 g of `CO_(2)` is approx. :-
Last Answer : The number of oxygen atoms in 4.4 g of `CO_(2)` is approx. :- A. `1.2 xx 10^(23)` B. `6 xx 10^(22)` C. `6 xx 10^(23)` D. `12 xx 10^(23)`
Description : The number of atoms in 4.25 g of `NH_(3)` is approximately :-
Last Answer : The number of atoms in 4.25 g of `NH_(3)` is approximately :- A. `1 xx 10^(23)` B. `2 xx 10^(23)` C. `4 xx 10^(23)` D. `6 xx 10^(23)`
Description : The cencentration of `CO_(2)` in the atmosphere is approximately
Last Answer : The cencentration of `CO_(2)` in the atmosphere is approximately A. `0.003%` B. `0.03%` C. `0.30%` D. `3.00 %`
Description : In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`
Last Answer : In mitochondrial matrix complete oxidation of pyruvate takes place in which all the hydrogen atoms are removed, leaving three molecules of `CO_(2)`
Description : The EAN of metal atoms in `[Fe(CO)_(2)(NO^(+))^(2)] and Co_(2)(CO)_(8)` respectively are :
Last Answer : The EAN of metal atoms in `[Fe(CO)_(2)(NO^(+))^(2)] and Co_(2)(CO)_(8)` respectively are : A. 34,35 B. 34,36 C. 36,36 D. 36,35
Description : 0.6 g of carbon was burnt in the air to form `CO_(2)`. The number of molecules of `CO_(2)` introduced into the will be : `C+O_(2)toCO_(2)`
Last Answer : 0.6 g of carbon was burnt in the air to form `CO_(2)`. The number of molecules of `CO_(2)` introduced into ... C. `6.02xx10^(22)` D. `3.01xx10^(22)`
Description : Estimate the number of atoms comprising a silicon chip that is 0.2 millimeters by 0.2 millimeters by 0.1 millimeters, given that the density of silicon is 2.34 grams per cubic centimeter, the number of atoms in a gram-weight is approximately 6 x 1023 atoms, and the atomic weight of silicon is 28:
Last Answer : ANSWER: 2 x 1017
Description : What is the standard enthalpy change at 298 K for the following reaction? `CO_(2) (g)+ C("diamond") rarr 2CO(g)` Given : `DeltaH_(f)^(@)(CO,g) = - 110
Last Answer : What is the standard enthalpy change at 298 K for the following reaction? `CO_(2) (g)+ C("diamond") rarr 2CO(g ... `+172.5 kJ//mol` D. `170.5 kJ//mol`
Description : Given `C(s)+O_(2)(g)rarr CO_(2)(g)+94.2` Kcal `H_(2)(g)+2O_(2)(g)rarr CO_(2)(g)+2H_(2)O(l)+210.8` Kcal The heat of formation of methane in Kcal will b
Last Answer : Given `C(s)+O_(2)(g)rarr CO_(2)(g)+94.2` Kcal `H_(2)(g)+2O_(2)(g)rarr CO_(2)(g)+2H_(2)O(l)+210.8` Kcal ... `-45.9` B. `-47.8` C. `-20.0` D. `-47.3`
Description : Using the following thermochemical data. `C(S)+O_(2)(g)rarr CO_(2)(g), Delta H=94.0` Kcal `H_(2)(g)+1//2O_(2)(g)rarr H_(2)O(l), Delta H=-68.0` Kcal `C
Last Answer : Using the following thermochemical data. `C(S)+O_(2)(g)rarr CO_(2)(g), Delta H=94.0` Kcal `H_(2)(g)+1// ... .0` Kcal C. `-114.0` Kcal D. `+114.0` Kcal
Description : `C(s)+O_(2)(g)rarr CO_(2)(g)+94.0` K cal. `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g), Delta H=-67.7` K cal. From the above reactions find how much heat (Kca
Last Answer : `C(s)+O_(2)(g)rarr CO_(2)(g)+94.0` K cal. `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g), Delta H=-67.7` K cal. ... g)` A. `20.6` B. `26.3` C. `44.2` D. `161.6`
Description : `Delta_(f)^(@)` for `CO_(2(g)), CO_((g))` and `H_(2)O_((g))` are `-393.5,-110.5` and `-241.8kJ mol^(-1)` respectively. The standard enthalpy change `(
Last Answer : `Delta_(f)^(@)` for `CO_(2(g)), CO_((g))` and `H_(2)O_((g))` are `-393.5,-110.5` and `-241.8kJ mol^(-1 ... A. `524.1` B. `41.2` C. `-262.5` D. `-41.2`
Description : For the reaction `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g)` Which one of the statement is correct at constant T and P ?
Last Answer : For the reaction `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g)` Which one of the statement is ... ` D. `Delta H` is independent of physical state of reactants
Description : `Delta S` for the reaction , `MgCO_(3)(s)rarr MgO(s)+CO_(2)(g)` will be :
Last Answer : `Delta S` for the reaction , `MgCO_(3)(s)rarr MgO(s)+CO_(2)(g)` will be :
Last Answer : For the reaction `CO(g)+(1)/(2)O_(2)(g)rarr CO_(2)(g)` Which one of the statement is correct at ... ` C. `Delta H lt Delta E` D. None of the above
Description : Heat of reaction for, `CO(g)+1//2O_(2)(g)rarr CO_(2)(g)` at constant V is -67.71 K cal at `17^(@)C` . The heat of reaction at constant P at `17^(@)C`
Last Answer : Heat of reaction for, `CO(g)+1//2O_(2)(g)rarr CO_(2)(g)` at constant V is -67.71 K cal at `17^(@)C` . ... B. `+68.0` K cal C. `-67.4` K cal D. None
Description : For `CaCO_(3)(s)rarr CaO(s)+CO_(2)(g)` at `977^(@)C, Delta H = 174` KJ/mol , then `Delta E` is :-
Last Answer : For `CaCO_(3)(s)rarr CaO(s)+CO_(2)(g)` at `977^(@)C, Delta H = 174` KJ/mol , then `Delta E` is :- A. 160 KJ B. 163.6 KJ C. 186.4 KJ D. 180 KJ
Description : The enthalpy of formation of `CO(g), CO_(2)(g),N_(2)O(g)` and `N_(2)O_(4)(g)` is `-110,-393,+81` and 10 kJ / mol respectively. For the reaction `N_(2)
Last Answer : The enthalpy of formation of `CO(g), CO_(2)(g),N_(2)O(g)` and `N_(2)O_(4)(g)` is `-110,-393,+81` and 10 ... is A. `-212` B. `+212` C. `+778` D. `-778`
Description : In conversion of lime-stone to lime, `CaCO_(3(s)) to CaO_((s)) + CO_(2(g))` the values of `DeltaH^@` and `DeltaS^@` are `+179.1 kJmol^(-1)` and `160.2
Last Answer : In conversion of lime-stone to lime, `CaCO_(3(s)) to CaO_((s)) + CO_(2(g))` the values of `DeltaH^@` and ... : A. 1008 K B. 1200 K C. 845 K D. 1118 K
Description : `NH_(4)COONH_(2)(s)hArr2NH_(3)(g)+CO_(2)(g)` If equilibrium pressure is 3 atm for the above reaction, then `K_(p)` for the reaction is
Last Answer : `NH_(4)COONH_(2)(s)hArr2NH_(3)(g)+CO_(2)(g)` If equilibrium pressure is 3 atm for the above reaction, then ` ... the reaction is A. 27 B. 4 C. 3 D. 9
Description : The volume of `CO_(2)` at STP obtained by heating 1 g of `CaCO_(3)` will be
Last Answer : The volume of `CO_(2)` at STP obtained by heating 1 g of `CaCO_(3)` will be A. 1 L B. `22.4 L` C. `0.224 L` D. `11.2 L`
Description : Volume at NTP of 0.22 g of `CO_(2)` is same as that of
Last Answer : Volume at NTP of 0.22 g of `CO_(2)` is same as that of A. 0.01 g of hydrogen B. 0.085 g of hydrogen C. 320 mg of gaseous `SO_(2)` D. All of the above.
Description : 44 g of a sample of organic compound on complet combustion gives 88 g `CO_(2)` and 36 g of `H_(2)O` . The molecular formula of the compound may be :-
Last Answer : 44 g of a sample of organic compound on complet combustion gives 88 g `CO_(2)` and 36 g of `H_(2)O` . The ... . `C_(2)H_(4)O` D. `C_(3)H_(6)O`
Description : Ammonium salts decompose quite readily on heating : (i) Ammonium salt of weak oxidizing anion (e.g. `Cl^(-), CO_(3)^(2-), SO_(4)^(2-)`) `overset("heat
Last Answer : Ammonium salts decompose quite readily on heating : (i) Ammonium salt of weak oxidizing anion (e.g. `Cl^(-), CO_(3) ... N_(2)` D. `NO, NH_(3), N_(2)O`
Description : How many millilitres of `0.1 NH_(2)SO_(4)` solution will be required for complete reaction with a solution containing 0.125 g of pure `Na_(2)CO_(3)`?
Last Answer : How many millilitres of `0.1 NH_(2)SO_(4)` solution will be required for complete reaction with a solution containing ... .6 mL C. 26.3 mL D. 32.6 mL
Description : Determine the equivalent weight of the following ions : `(a) Na^(+) " " (b) Al^(3+) " " (c) NO^(+) " " Cl^(-)` `(e) CO_(3)^(2-) " " SO_(4)^(2-) " " (g
Last Answer : Determine the equivalent weight of the following ions : `(a) Na^(+) " " (b) Al^(3+) " " (c) NO^(+) " " Cl^(- ... " " SO_(4)^(2-) " " (g) PO_(4)^(3-)`
Description : Which of the following metal carbonates liberate. `CO_(2)(g)` on heating :
Last Answer : Which of the following metal carbonates liberate. `CO_(2)(g)` on heating : A. `Na_(2)CO_(3)` B. `K_(2)CO_(3)` C. `Rb_(2)CO_(3)` D. `Ag_(2)CO_(3)`
Description : Assertion `:-` In the tissue high `P_(O_(2))`, low `P_(CO_(2))`, higher `H^(o+)` concentration conditions are favourable for dissociation of oxygen fr
Last Answer : Assertion `:-` In the tissue high `P_(O_(2))`, low `P_(CO_(2))`, higher `H^(o+)` ... Reason is False. D. If both Assertion & Reason are false.
Description : Neutrons have mass approximately equal to that of __________ atoms. (A) Hydrogen (B) Helium (C) Deuterium (D) None of these
Last Answer : (A) Hydrogen
Description : Which of the following statements about ethene, C2H4, is incorrect? (a) The H–C–H bond angles are approximately 109.5°. (b) There is a total of five sigma bonds. (c) The carbon atoms are sp2 hybridized. (d) The H–C–H bond angles are approximately 120°.
Last Answer : The H–C–H bond angles are approximately 109.5°.
Description : A student makes scale models of the subatomic particles. He uses an object with a mass of 1 g to represent an electron. Approximately what mass should the object have that he uses to represent the proton?
Last Answer : about 1,800 g A+
Description : The amount of oxygen transported to tissue by one litre of blood under strenous exercise condition is approximately :-
Last Answer : The amount of oxygen transported to tissue by one litre of blood under strenous exercise condition is approximately :- ... . 50 ml C. 15 ml D. 150 ml
Description : Which of the following statement(s) is/are true concerning oxygen delivery? a. The amount of oxygen delivered to peripheral tissues is dependent upon the oxygen content in arterial blood and cardiac ... O2/dL d. Normal systemic oxygen delivery for a typical adult is approximately 1000 cc/min
Last Answer : Answer: a, c, d The amount of oxygen that is delivered to peripheral tissues is the product of the oxygen content in arterial blood times the cardiac output. Normally, oxygen content of arterial blood is ... of venous blood is 16 cc/dL. Hence, the normal arterial-venous difference is 4 cc O2/dL
Description : Sepsis causes a marked metabolic response. Which of the following statement(s) is/are true concerning the metabolic response to sepsis? a. Oxygen consumption is increased in the face of infection ... d. The extent of increase in oxygen consumption relates to the severity of the infection
Last Answer : Answer: a, c, d Oxygen consumption is usually elevated in the infected patient. The extent of this increase is related to the severity of the infection, with peak elevations reaching 50% ... suggest that the metabolic rate increases 10% to 13% for each elevation of 1°C in central temperature
Description : The percentage of oxygen in air is approximately – (1) 100% (2) 1% (3) 78% (4) 21%
Last Answer : (4) 21% Explanation: Composition of air Nitrogen : 78.08 percent Oxygen : 20.94 percent Argon : 0.93 percent Carbondioxdide : 0.03 percent Neon : 0.0018 percent Helium 0.0005 percent Ozone : 0.00006 percent Hydrogen : 0.00005 percent
Description : The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately by (a) 200 times (b) 1000 times (c) 2 times (d) 20 times.
Last Answer : (a) 200 times
Description : The percentage of oxygen in air is approximately (1) 100% (2) 1% (3) 78% (4) 21%
Last Answer : 21%
Description : Calculate the number of atoms present in one drop of water having mass 1.8 g .
Last Answer : Calculate the number of atoms present in one drop of water having mass 1.8 g . A. `0.3N_(A)` B. `0.2N_(A)` C. `0.1N_(A)` D. `0.01N_(A)`
Description : Calculate the number of atoms present in 7.1 g of chlorine ?
Last Answer : Calculate the number of atoms present in 7.1 g of chlorine ? A. `0.2 N_(A)` B. `0.3N_(A)` C. `0.4N_(A)` D. `0.5 N_(A)`
Description : Silver (atomic weight `108 g mol^(-1))` has a density of `10.5 g cm^(-3)`. The number of silver atoms on a surfaces of area `10^(-12) m^(2)` can be ex
Last Answer : Silver (atomic weight `108 g mol^(-1))` has a density of `10.5 g cm^(-3)`. The number of silver atoms on a ... `Y xx 10^(-x)`, The value of `x` is .
Description : Calculate the number of oxygen atoms in 1 mole of O2. -Chemistry 9th
Last Answer : 1 molecule of O2 = 2 oxygen atoms So, 1 mole of O2 = 2 mole oxygen atoms = 2 × 6.022 × 1023 = 12.044 ×1023 oxygen atoms.
Description : What is the number of atoms in 1 gram of atomic oxygen ?
Last Answer : 1 gram-atom Number of atoms in oxygen = 6.023 x 1023
Description : Assertion :- Oxidation number of `Cr` in `CrO_(3)` is `+6`. Reason :- In `CrO_(5)`, four oxygen atoms are involved in peroxide linkage.
Last Answer : Assertion :- Oxidation number of `Cr` in `CrO_(3)` is `+6`. Reason :- In `CrO_(5)`, four ... Reason is False. D. If both Assertion & Reason are False.
Description : Art B Calculate the number of moles of magnesium, chlorine, and oxygen atoms in 4.30 moles moles of magnesium perchlorate, Mg(Cl O 4 ) 2 Mg(ClO4)2 . Express the number of moles of Mg Mg , Cl Cl , and O O atoms numerically, separated by comma?
Last Answer : Answers is the place to go to get the answers you need and to ask the questions you want
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 : 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 : Heavy isotope of hydrogen
Description : `3.011 xx 10^(22)` atoms of an element weight 1.15 g. The atomic mass of the element is :-
Last Answer : `3.011 xx 10^(22)` atoms of an element weight 1.15 g. The atomic mass of the element is :- A. 10 amu B. 2.3 amu C. 35.5 amu D. 23 amu
Description : 2. How many gram atoms are there in \( 8.0 g \) of \( S \) ?
Last Answer : 2. How many gram atoms are there in \( 8.0 g \) of \( S \) ?