Description : What is the total number of atoms contained in a 1.00 mole sample of helium?
Last Answer : The total number of atoms contained in a 1,00 mole sample ofhelium is 6,022 140 857.10e23.
Description : What is the mass in grams of one mole of helium atoms?
Last Answer : 6
Description : What is the total number of nitrogen atoms in 0.25 mole of NO2 gas?
Last Answer : 0,25 mole of NO2 gas contain 1,505 535 214 25.10e23 nitrogen atoms.
Description : One mole of nitrogen at 8 bar and 600 K is contained in a piston cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is (A) 30554 (B) 10373 (C) 4988.4 (D) 4364.9
Last Answer : (B) 10373
Description : Calculate the pressure in atm of 1.0 mole of helium in a 2.0 dm^3 container at 20.0°C.
Last Answer : Calculate the pressure in atm of 1.0 mole of helium in a 2.0 dm3 container at 20.0°C.
Description : The mass of one Avogadro number of helium atom is (a) 1.00 g (b) 4.00 g (c) 8.00 g (d) 6.02 × 1023 g
Last Answer : Ans:(b)
Description : If a sample that originally contained grams of C14 has gone through two half-lives of decay how much C14 will be left?
Last Answer : 2.5
Description : If a sample that originally contained 10 grams of C14 has gone through two half-lives of decay, how much C14 will be left?
Description : Carbon l4 with a half life of 5,568 years is used to date a sample of wood. The sample has l/8 the carbon l4 contained in a living tree of the same species. Approximately how old is the specimen?
Last Answer : ANSWER: l6,704 YEARS
Description : What is the mass in grams of 1.00 mole of sodium fluride NaF?
Last Answer : Need answer
Description : How many moles on atoms are contained in 4.5X10 to the power of 22 atoms Cu?
Last Answer : What is the answer ?
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 : Find the number of atoms in 0.5 mole of C atom. -Chemistry 9th
Last Answer : 0.5 mole of C=6.022×10*23 no. of atoms = 6.022×10*23/2 =3.011×10*23 hope this helps u
Description : What is the number of hydrogen atoms present in 0.791 mole of ammonia?
Last Answer : The number of hydrogen atoms is 14,290540253661.10e23.
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 : Is the amount of a substance that contains Avogadro’s number of atoms/molecules. a. mass b. matter c. gram-mole d. volume
Last Answer : gram-mole
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 : What did the scientist say when he discovered 2 atoms of helium? -Riddles
Last Answer : He he!
Description : What statements is true about the atoms in helium gas?
Last Answer : Helium has two natural isotopes and is an inert noble gas.
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 type of intermolecular forces exists among the following molecules? (a) H2S molecules (b) H2O (c) Cl2 and CCl4 (d) SiH4 (e) Helium (f) He atoms and HCl molecules
Last Answer : Ans. (a) Dipole-Dipole interactions. (b)H-Bond. (c)Dispersion forces. (d)Dispersion forces. (e)Dispersion forces. (f)Induced dipole-dipole interactions.
Description : All the atoms of the world comprise of electrons, proton & neutron except that of __________ atom in which neutron is absent. (A) Deuterium (B) Hydrogen (C) Neon (D) Helium
Last Answer : (B) Hydrogen
Description : What is the mass in grams of one-mole of potassium atoms?
Description : 10 mole of carbon contains A. 6.02 × 1024 atoms B. 6.03 × 1023 atoms C. 6.02 × 1023 atoms D. 6.04 × 1024 atoms
Last Answer : 6.02 × 1024 atoms
Description : How many moles are in a sample containing 2.71 x 10^24 atoms of iron?
Last Answer : two or three
Description : Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. hydrogen atoms absorb a fraction of light and subsequ
Last Answer : Monochromatic radiation of wavelength `lambda` is incident on a hydrogen sample in ground state. ... different wavelength .Find the value of `lambda`
Description : A beam of ultraviolet radius hacking wavelength between `100nm and 200nm` is inclined on a sample of atomic hydrogen gas. Assuming that the atoms are
Last Answer : A beam of ultraviolet radius hacking wavelength between `100nm and 200nm` is inclined on a sample of ... being observed by on atom in the ground state
Description : 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?
Description : How many C-13 atoms are present on average in a 1.8000 and times104-atom sample of carbon?
Last Answer : Feel Free to Answer
Description : How many C atoms are present in the sample of C3H8 with mass 5.31 g?
Description : What name is given to the time taken for half the atoms in a sample of a radioactive isotope to decay?
Last Answer : Half-life
Description : A small dairy farm daily produces 100 kilograms of average quality buffalo milk and sells it to an organised dairy at the rate of Rs. 100 per kilogram of total solids contained in the milk. How much would be the daily gross ... (D) Between Rs. 1,000 and Rs. 1,100 (E) Between Rs. 1,650 and Rs. 1,850
Last Answer : (B) Between Rs. 1,250 and Rs. 1,400
Description : A solid metallic block weighing 5 kg has an initial temperature of 500°C. 40 kg of water initially at 25°C is contained in a perfectly insulated tank. The metallic block is brought into contact with water. Both of them come to equilibrium. ... .kg-1, K-1is (A) -1.87 (B) 0 (C) 1.26 (D) 3.91
Last Answer : (B) 0
Description : 5 moles of `SO_(2)` and 5 moles of `O_(2)` react in a closed vessel. At equilibrium 60% of the `SO_(2)` is consumed . The total number of gaseous mole
Last Answer : 5 moles of `SO_(2)` and 5 moles of `O_(2)` react in a closed vessel. At equilibrium 60% of the `SO_(2)` is consumed ... - A. 5.1 B. 3.9 C. 10.5 D. 8.5
Description : Complete hydrolysis product of 1 mole each of following will need how many total number of moles of NaOH for complete neutralisation? `SOCl_(2), SO_(2
Last Answer : Complete hydrolysis product of 1 mole each of following will need how many total number of moles of NaOH for ... ), PCl_(3), PCl_(5), NCl_(3)`
Description : Sulphur can form dihalide, tetrahalide and hexahalide with fluorine. One mole of each of these three compounds is mixed with water. The total number o
Last Answer : Sulphur can form dihalide, tetrahalide and hexahalide with fluorine. One mole of each of these three ... is ____. If no reaction occurs, count zero
Description : A 3.2 m diameter balloon is filled with Helium. The total weight of balloon, gas and pay load is 10 kg kg. In an isothermal atmosphere having conditions identical to N.T.P. the balloon will rise to a height of about a.6000 m b.1500 m c.3000 m d.2000 m e.1000 m
Last Answer : a. 6000 m
Description : If there are 3 moles of hydrogen 6 moles of oxygen and 9 moles of helium in a 10 L vessel at 27 and degC the total pressure of the gas mixture will be?
Description : (2) it is lighter than air Explanation: Helium is the second lightest element and is the second most abundant element in the observable universe, being present at about 24% of the total elemental mass ... elements combined. A well-known but minor use is as a lifting gas in balloons and airships
Last Answer : Ammonial is a mixture of – (1) aluminium powder and ammonium nitrate (2) aluminium powder and ammonium chloride (3) aluminium powder and ammonium sulphate (4) aluminium powder and potassium nitrate
Description : Which gas was discovered on the sun about 151 years ago during total solar eclipse? A. Hydrogen B. Helium (Answer) C. Nitrogen D. Flourine
Last Answer : B. Helium (Answer)
Description : If helium is introduced in a reactor containing O2 , SO2 and SO3 at equilibrium, so that total pressure increases while volume and temperature remains constant. In this case the dissociation of SO3 ( ... 's principle). (A) Decreases (B) Increases (C) Remains unaltered (D) Changes unpredictably
Last Answer : (A) Decreases
Description : When a mixture containing `PCl_(3)` and `PCl_(5)` is heated with ethyl alcohol, a total of 4 moles of ehtyl chloride is formed. Mole ratio of `PCl_(3)
Last Answer : When a mixture containing `PCl_(3)` and `PCl_(5)` is heated with ethyl alcohol, a total of 4 moles of ehtyl chloride is ... : 1` C. `1 : 3` D. `2 : 1`
Description : In case of an ideal solution, the total vapor pressure varies __________ with the composition expressed as mole fraction, (A) Inversely (B) Linearly (C) Exponentially (D) None of these
Last Answer : (B) Linearly
Description : Henry's law states that the (A) Partial pressure of a component over a solution is proportional to its mole fraction in the liquid (B) Partial pressure of a component over a solution ... pressure (D) Partial pressure is equal to the product of the mole fraction and total pressure
Last Answer : (A) Partial pressure of a component over a solution is proportional to its mole fraction in the liquid
Description : “The fugacity of a gas in a mixture is equal to the product of its mole fraction and its fugacity in the pure state at the total pressure of the mixture". This is (A) The statement as per Gibbs-Helmholtz (B) Called Lewis-Randall rule (C) Henry's law (D) None of these
Last Answer : (B) Called Lewis-Randall rule
Description : what Ms. Texeira works in sales and is paid a base salary of $41,000 plus 5.5% of sales. Last year her sales were $200,00 .What was her total pay last year?
Last Answer : 32855$