How many C atoms are present in the sample of C3H8 with mass 5.31 g?

How many C atoms are present in the sample of C3H8 with mass 5.31 g?
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How many moles of C3H8 contain 4.95 1024 hydrogen atoms?

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If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be __________ Kcal. (A) -19.4 (B) -30.2 (C) 55.2 (D) -55.2

Description : If heat contents of CH4, C2H4 and C3H8 are -17.9, 12.5 and -24.8 kcal/mole respectively, than ΔH for the reaction CH4(g) + C2H4(g) ⇌ C3H8(g) will be __________ Kcal. (A) -19.4 (B) -30.2 (C) 55.2 (D) -55.2

Last Answer : (A) -19.4

Calculate the number of atoms present in one drop of water having mass 1.8 g .

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If a sample of pure sodium has a mass of 8.2 grams and sodium has an average atomic mass of 22.99 gmol how many sodium atoms are there in the sample?

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How many C-13 atoms are present on average in a 1.8000 and times104-atom sample of carbon?

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The combustion of one mole of propane, C3H8, produces how many moles of H2O? (a) 2 (b) 3 (c) 4 (d) 5

Description : The combustion of one mole of propane, C3H8, produces how many moles of H2O? (a) 2 (b) 3 (c) 4 (d) 5

Last Answer : 4

What volume would be occupied by 2 moles of propane gas C3H8 at standard conditions?

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Main constituent of natural gas is (A) CH4 (upto 90%) (B) C2H6 (C) C3H8 (D) H2

Description : Main constituent of natural gas is (A) CH4 (upto 90%) (B) C2H6 (C) C3H8 (D) H2

Last Answer : (A) CH4 (upto 90%)

A compound of formula C3H8 does not react with bromine in CCl4 in the dark. The compound could be (a) Alkane (b) Cycloalkane (c) Alkene (d) Cycloalkene

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If 31.3 g of manganese(II) chloride 48.3 g of chlorine gas and 25.7 g of water react to produce manganese(IV) oxide and hydrochloric acid what is the limiting reactant and what mass of hydrochloric?

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A Sample of a compound contains 64 g of copper and 16 g of oxygen what is the ratio of mass to copper of oxygen?

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A compacted soil sample using 10% moisture content has a weight of 200 g and mass unit weight of 2.0 g/cm3 . If the specific gravity of soil particles and water are 2.7 and 1.0, the degree of saturation of the soil is (A) 11.1 % (B) 55.6 % (C) 69.6 % (D) None of these

Description : A compacted soil sample using 10% moisture content has a weight of 200 g and mass unit weight of 2.0 g/cm3 . If the specific gravity of soil particles and water are 2.7 and 1.0, the degree of saturation of the soil is (A) 11.1 % (B) 55.6 % (C) 69.6 % (D) None of these

Last Answer : (B) 55.6 %

A sample of saturated soil has 30% water content and the specific gravity of soil grains is 2.6. The dry density of the soil mass in g/cm3 , is (A) 1.47 (B) 1.82 (C) 1.91 (D) None of these

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Which of the following is the best example of law of conservation of mass? [NCERT 1975] (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2. (B) When 12 g of carbon is heated in a vacuum there is no change in mass. (C) A sample of air increases in volume when heated at constant pressure but its mass remains unaltered. (D) The weight of a piece of platinum is the same before and after heating in air.

Description : Which of the following is the best example of law of conservation of mass? [NCERT 1975] (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2. (B) When 12 g of carbon is ... mass remains unaltered. (D) The weight of a piece of platinum is the same before and after heating in air.

Last Answer : (A) 12 g of carbon combines with 32 g of oxygen to form 44 g of CO2.

How many moles of aluminum oxide are present in a sample having a mass of 178.43g?

Description : How many moles of aluminum oxide are present in a sample having a mass of 178.43g?

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`3.011 xx 10^(22)` atoms of an element weight 1.15 g. The atomic mass of the element is :-

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Calculate the number of atoms present in 7.1 g of chlorine ?

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How many sulfur atoms are present in 25.6 g of Al2(S2O3)3?

Description : How many sulfur atoms are present in 25.6 g of Al2(S2O3)3?

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How many moles are in a sample containing 2.71 x 10^24 atoms of iron?

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Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. hydrogen atoms absorb a fraction of light and subsequ

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What is the total number of atoms contained in a 1.00 mole sample of helium?

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What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?

Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?

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It is important to balance the chemical equations to satisfy the law of conservation of mass. Which of the following statements of the law is incorrect? (a) The total mass of the elements present in the reactants is equal to the total mass of the elements present in the products. (b) The number of atoms of each element remains the same, before and after a chemical reaction. (c) The chemical composition of the reactants is the same before and after the reaction (d) Mass can neither be created nor can it be destroyed in a chemical Reaction.

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Compute the maximum shearing stress developed in a phosphor bronze spring having mean diameter of 200 mm and consisting of 24 turns of 20-mm diameter wire when the spring is stretched 100 mm. and G = 42 GPa. a. 51 MPa b. 31.89 MPa c. 80 MPa d. 70 MPa

Description : Compute the maximum shearing stress developed in a phosphor bronze spring having mean diameter of 200 mm and consisting of 24 turns of 20-mm diameter wire when the spring is stretched 100 mm. and G = 42 GPa. a. 51 MPa b. 31.89 MPa c. 80 MPa d. 70 MPa

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A soil has bulk density 2.30 g/cm3 and water content 15 per cent, the dry density of the sample, is (A) 1.0 g/cm2 (B) 1.5 g/cm3 (C) 2.0 g/cm3 (D) 2.5 g/cm3

Description : A soil has bulk density 2.30 g/cm3 and water content 15 per cent, the dry density of the sample, is (A) 1.0 g/cm2 (B) 1.5 g/cm3 (C) 2.0 g/cm3 (D) 2.5 g/cm3

Last Answer : (C) 2.0 g/cm3

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 :-

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The volume of nitrogen gas Um (measured at STP) required to cover a sample of silica get with a mono-molecular layer is `129 cm^(3) g^(-1)` of gel. Ca

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A 500 g toothpaste sample has 0.4 g fluoride concentration. The fluoride concentration in terms of ppm will be

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What will the concentration of `[Ca^(+2)]` in a sample of 1 litre hard water if after treatment with washing soda 10 g insoluable `CaCO_(3)` is precip

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A 0.2 g sample containing copper (II) was analysed iodometrically, where copper (II) is reduced to copper (I) by iodide ions. `2Cu^(2+) +4I^(-)rarr2 C

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Last Answer : A 0.2 g sample containing copper (II) was analysed iodometrically, where copper (II) is reduced to copper (I) by ... ` B. `63.5%` C. `53%` D. `37%`

The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-`decays occur from `1 g` sample in 365 days ?

Description : The decay constant for an `alpha-` decay of `Th^(232)` is `1.58xx10^(-10)s^(-1)`. How many `alpha-`decays occur from `1 g` sample in 365 days ?

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How much cesium Half-Life2 years would remain from a 10 G sample?

Description : How much cesium Half-Life2 years would remain from a 10 G sample?

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What is the half life of 3 g sample of radioisotope that decay to 0.75 g in 30 days?

Description : What is the half life of 3 g sample of radioisotope that decay to 0.75 g in 30 days?

Last Answer : 15 days

How many moles of carbon monoxide are in 350 g sample?

Description : How many moles of carbon monoxide are in 350 g sample?

Last Answer : 350 g sample of CO contain 12,49 moles.

What is the half life of 12 g sample of radioisotope that decayed to 6 g in 28 years?

Description : What is the half life of 12 g sample of radioisotope that decayed to 6 g in 28 years?

Last Answer : 28 years

A field soil sample weighing 60 g, lost12 g on over dying. What is the moisture percent on dry weight basis?

Description : A field soil sample weighing 60 g, lost12 g on over dying. What is the moisture percent on dry weight basis?

Last Answer : Ans. 25%

For determining the moisture content of a soil sample, the following data is available Weight of container = 260 g, Weight of soil sample and = 320 g container, Weight of soil sample (dried) and = 310 g container. The moisture content of the soil sample, is (A) 15 % (B) 18 % (C) 20 % (D) 25 %

Description : For determining the moisture content of a soil sample, the following data is available Weight of container = 260 g, Weight of soil sample and = 320 g container, Weight of soil sample (dried) and = 310 g container. The moisture content of the soil sample, is (A) 15 % (B) 18 % (C) 20 % (D) 25 %

Last Answer : (C) 20 %

A moist soil sample of volume 60 cc. weighs 108 g and its dried weight is 86.4 g. If its absolute density is 2.52, the degree of saturation is (A) 54 % (B) 64 % (C) 74 % (D) 84 %

Description : A moist soil sample of volume 60 cc. weighs 108 g and its dried weight is 86.4 g. If its absolute density is 2.52, the degree of saturation is (A) 54 % (B) 64 % (C) 74 % (D) 84 %

Last Answer : (D) 84 %

If dry density, water density and specific gravity of solids of a given soil sample are 1.6 g/cc, 1.84 g/cc and 2.56 respectively, the porosity of the soil sample, is (A) 0.375 (B) 0.370 (C) 0.380 (D) 0.390

Description : If dry density, water density and specific gravity of solids of a given soil sample are 1.6 g/cc, 1.84 g/cc and 2.56 respectively, the porosity of the soil sample, is (A) 0.375 (B) 0.370 (C) 0.380 (D) 0.390

Last Answer : (A) 0.375

A moist soil sample weighing 108 g has a volume of 60 cc. If water content is 25% and value of G = 2.52, the void ratio is (A) 0.55 (B) 0.65 (C) 0.75 (D) 0.80

Description : A moist soil sample weighing 108 g has a volume of 60 cc. If water content is 25% and value of G = 2.52, the void ratio is (A) 0.55 (B) 0.65 (C) 0.75 (D) 0.80

Last Answer : (C) 0.75

A partially saturated sample of soil has a unit weight of 2.0 g/cm3 and specific gravity of soil particles is 2.6. If the moisture content in the soil is 20%, the degree of saturation is (A) 20 % (B) 77 % (C) 92 % (D) None of these

Description : A partially saturated sample of soil has a unit weight of 2.0 g/cm3 and specific gravity of soil particles is 2.6. If the moisture content in the soil is 20%, the degree of saturation is (A) 20 % (B) 77 % (C) 92 % (D) None of these

Last Answer : Answer: Option C

An unsaturated 100 cm3 sample of soil weighs 190 g. If its dried weight is 160 g, water content of the soil, is (A) 0.188 (B) 0.288 (C) 0.388 (D) 0.588

Description : An unsaturated 100 cm3 sample of soil weighs 190 g. If its dried weight is 160 g, water content of the soil, is (A) 0.188 (B) 0.288 (C) 0.388 (D) 0.588

Last Answer : Answer: Option A

If the specific gravity and voids in soil sample are G and e respectively, the hydraulic gradient i, is (A) (G - 1)/(1 + e) (B) (G + 1)/(1 - e) (C) (1 - G)/(1 + e) (D) (1 + G)/(1 + e)

Description : If the specific gravity and voids in soil sample are G and e respectively, the hydraulic gradient i, is (A) (G - 1)/(1 + e) (B) (G + 1)/(1 - e) (C) (1 - G)/(1 + e) (D) (1 + G)/(1 + e)

Last Answer : Answer: Option A

An electron is moving with a velocity of `10^(7) m s^(-1)`. Find its energy in electron volts. (Mass of electron `=9.1xx10^(-31) kg` and charge of ele

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Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of electron `=9x10^(-31) kg, e= 1.6 xx10^

Description : Calculate the frequency of revolution of an electron in the first orbit of an aluminum atom. Given that mass of electron `=9x10^(-31) kg, e= 1.6 xx10^

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What is the age and value ofstevens savage arms corporation chicopee falls mass US gauge 31 model 94C?

Description : What is the age and value ofstevens savage arms corporation chicopee falls mass US gauge 31 model 94C?

Last Answer : Contact Savage Firearms Customer Service through their website.It is not a 31 gauge, as that does not exist.