# The mass of an individual atom of calcium is 40.08 amu. How many atoms would weigh a total of 15.46 g of this element if the mass of 1 amu is 1.6605x10-24 g?

41,990 results

2CuSO4 what does the information above represent? (A) two molecules made of one copper atom, one sulfur atom, and four oxygen atoms. (B) two elements made of one copper atom, one sulfur atom, and four oxygen atoms. (C) two copper atoms, one sulfur atom,

2. ## chemistry

what is the mass in grams? a) 3.011 x 10^23 atoms F b)1.50 x 10^23 atoms Mg c)4.50 x 10^12 atoms Cl d)8.42 x 10^18 atoms Br e) 25 atoms w f) 1 atom Au can you please explain a and b to me then i'll come back later and see if i did the rest right? Thanks in

3. ## chemistry

For the following fusion reaction, Calculate change in energy per mole.( Answer in J/mole) 2H1 + 2H1 ---> 3H1 + 1H1 (the mass number is in front of the atom and the atomic number is behind the atom) Given info:Atoms with their masses(amu) H-1 1.00782 H-2

4. ## science

1.the modern atomic model includes orbiting the nucleus. which of the following parts of dalton's was disproved by the discovery of the electron atoms are tiny particles atoms cannot be divided into smaller parts atoms have specific mass and size atoms

5. ## Chemistry

Why would two atoms form a covalent bond instead of an ionic bond? Both atoms in a bond have similar electronegativity; thus, neither atom is willing to transfer their electrons. Instead, the atoms both share electrons to satisfy the octet rule. Both atoms

6. ## Science

1. Which statement about subatomic particles is NOT true? (1 point) Protons and neutrons have almost the same mass. Protons and electrons have opposite charges. Unlike protons and electrons, neutrons have no charge. Protons and neutrons have the same

7. ## Chemistry

Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

8. ## Chemistry

On another planet, the isotopes of titanium have the following natural abundances. Isotope 46Ti Abundance 70.900% Mass(amu) 45.95263 Isotope 48Ti Abundance 10.000% Mass(amu) 47.94795 Isotope 50Ti Abundance 19.100% Mass(amu) 49.94479 What is the average

9. ## Chemistry

Which of the following statements is not consistent with the results obtained in Rutherford’s gold foil experiment? A. The nucleus of an atom is positively charged. B. The nucleus of an atom contains almost all the mass of the atom. C. Atoms are composed

10. ## Physical science

What happens when an atom gives up loosely held valence electrons to another atom? A. The two atoms form a mixture. B. A chemical bond forms between the two atoms. C. A chemical compound splits into separate elements. D. The two atoms combine to create an

11. ## chem

Calculate the atomic mass of titanium. The five titanium isotopes have atomic masses and relative abundances of 45.953 amu (8.00%), 46.952 amu (7.30%), 47.948 amu (73.80%), 48.948 amu (5.50%), and 49.945 amu (5.40%)

12. ## Chemistry

Rubbing alcohol often contains propanol, C3H7OH. Suppose you have an 85.9 g sample. a) How many carbon atoms are in the sample? b) How many hydrogen atoms are in the sample? c) How many oxygen atoms are in the sample? For a, I have tried dividing 85.9 by

13. ## Chemistry

An element consists of 1.40% of an isotope with mass 203.973 amu, 24.10% of an isotope with mass 205.9745 amu, 22.10% of an isotope with mass 207.9766 amu. Calculate the average atomic mass and identify the element

14. ## Science.

An atom of uranium-235 has a mass 235.043924 amu (atomic mass units). Using scientific notation, state the mass in amu of ten million such atoms.

15. ## Chemistry

Naturally occurring boron is 80.20% boron-11 (of atomic mass 11.01 amu) and 19.80% of some other isotope form of boron. What must be the atomic mass of this second isotope in order to account for the 10.81 amu average atomic mass of boron? A. 10.99 amu B.

16. ## chemistry

Two naturally occurring isotopes exist for the hypothetical element dippium. 25.0 percent of dippium atoms have a relative mass of 17.0 amu and 75.0 percent a relative mass of 21.3 amu. What is the atomic mass of dippium? Please show the work thanks

17. ## Chemistry

The element europium exists in nature as two isotopes: 151^Eu has a mass of 150.9196 amu, and 153^Eu has a mass of 152.9209 amu. The average atomic mass of europium is 151.96 amu. Calculate the relative abundance of the two europium isotopes.

18. ## Chemistry

An estimation of the radius of a lead atom: a. You are given a cube of lead that is 1.000 em on each side. The density of lead is 11.35 g/cm3. How many atoms of lead are contained in the sample. b. Atoms are spherical; therefore, the lead atoms in this

19. ## chemistry

Find the formula mass of the compound H2SO4. 1. 98.09 amu 2. 96.07 amu 3. 97.08 amu 4. 81.08 amu 5. 89.09 amu

20. ## chemistry

What is the atomic mass of B if 19.9% of all B atoms have a mass of 10.01 amu and 80.1% have a mass of 11.01 amu?

21. ## Science

Which of the following statements is not consistent with the results obtained in Rutherford’s gold foil experiment? A. The nucleus of an atom is positively charged. B. The nucleus of an atom contains almost all the mass of the atom. C. Atoms are composed

22. ## chemistry

When calcium chloride and ammonium phosphate are mixed, an insoluble precipitate of calcium phosphate forms and falls out of solution. After careful analysis of the purified precipitate, 8.16 * 10^25 atoms of calcium are found in the solid. How many other

23. ## CHM 090

what mass of lead (II) iodide (PbI2, mass= 461 amu)is predictated by the addition of an excess of potassium iodide (KI, mass=166 amu)to 50.0 mL of 0.60 M lead(II) nitrate (Pb(NO3)2, mass=331.2 amu)? Pb(NO3)2 + 2Kl==>PbI2 + 2KNO3

24. ## Chemistry

Three isotopes of Neon occur naturally: 20Ne (mass = 19.9924 amu) 21Ne (mass = 20.9938 amu) 22Ne (mass = 21.9914 amu) If the percent abundance of 21Ne is 0.2600, what is the percent abundance of 20Ne? How do I set up for these type of problems. I tried

25. ## Chemistry+need help checking work

Using aervage atmoic masses for each of the following elements, calculate the mass, in amu (grams) A. 635 atoms of hydrogen ---> 1 mole of H = 1.01g = 6.022 x 10^23 atom 635 atom of H 1.01g/6.022 x 10^23 atom I got 1.06 x 10^-21 amu. I got that answer

26. ## science

FeCl3 + 3H2O → Fe(OH)3 + 3HCl Element Mass of an Atom (amu) Fe 56 Cl 35 H 1 O 16 Iron chloride and water react according to the equation shown. The table shows the atomic masses of the elements involved in the reaction. What is the total mass of the

27. ## Biology 101

When we say an atom has an incomplete outer shell, this means the atom has ______________________ electrons in its outermost shell. Atoms that have incomplete outer shells usually seek to fill their shells by forming ____________________ ________________

28. ## Physics

Four tanks A, B, C, and D are filled with monatomic ideal gases. For each tank, the mass of an individual atom and the rms speed of the atoms are expressed in terms of m and vmax respectively (see the table). Suppose that m = 3.15 × 10-26 kg, and vrms =

29. ## Chemistry

Lead has four stable isotopes. ^204Pb (1.4%), ^206Pb (24.1%). ^207Pb (22.1%) and ^208Pb (52.4%). Find the atomic mass of ^208 Pb given that ^204Pb has an atomic mass of 203.973 amu, ^206Pb has an atomic mass of 205.974 amu, and ^207Pb has an atomic mass of

30. ## Physics

In the first step of nuclear fission, a U-235 atom absorbs a neutron and becomes U-236 before becoming unstable and breaking into two smaller atoms and emitting various energies and particles. The mass of the U-235 is 235 amu and the mass of the neutron is

31. ## physics

Given that the carbon atom has a mass of 12 amu, how many carbon atoms are there in a diamond with a mass of 8 g? ....atoms

32. ## Chemistry

Four isotopes of Lead occur naturally: 204Pb (mass = 203.973037 amu) 206Pb (mass = 205.974455 amu) 207Pb (mass = 206.975885 amu) 208Pb (mass = 207.976641 amu) If the percent abundance of 204Pb and 208Pb are 1.400 and 52.40, respectively, what is the

33. ## chemistry

Silicon has three naturally occurring isotopes: Si-28 with mass 27.9769 amu and a natural abundance of 92.21%, Si-29 with mass 28.9765 amu and a natural abundance of 4.69%, and Si-30 with mass 29.9737 amu and a natural abundance of 3.10%. Calculate the

34. ## chemistry

an unknown element crystallizes in a face-centered cubic unit cell. with an edge length of 392.4 pm. The solid has a density of 21.09 g/cm^3. what is atomic weight of solid? so what i did was : FC cubic uit --> 4 atoms edge length--> l = 2*root2*r = 392.4

35. ## physics

A water molecule consists of an oxygen atom with two hydrogen atoms bound to it. The bonds are .100nm in length and the angle between the two bonds is 106 degrees. Use the x-y axis shown and determine the location of the center of gracity of molecule.

36. ## Chemistry

Three isotopes of Argon occur naturally: 36Ar (mass = 35.9675 amu) 38Ar (mass = 37.9627 amu) 40Ar (mass = 39.9624 amu) If the percent abundance of 36Ar is 0.3400, what is the percent abundance of 40Ar?

37. ## Physics

A molecule consists of two atoms. The atoms have masses of 20 u and 10 u and are 1.08 *10^-10 m apart. How far from the first atom is the center of mass of the molecule? Can someone help please I tried: (20u*(1.08 *10^-10m)) + (10u*(1.08 *10^-10))/

38. ## Chemistry

On Earth, naturally occurring calcium metal contains 6 isotopes: Ca-40, Ca-42, Ca-43, Ca-44, Ca-46, Ca-48. Select all of the following that are true for a sample of naturally occurring calcium. A) The average mass of the calcium atoms is 40.078 amu. B)One

39. ## chem

one atom of silicon can properly be combined in a compound with A. one atom of chlorine B. two atoms of oxygen C. three atoms of hydrogen D. four atoms of calcium B. two atoms of oxygen (as in SiO2.. quartz and sand) Ther is also a compound SiO. It is used

40. ## Physics

Exploration 2: the Effect of Mass on Gas Behavior Procedure 1. Set the temperature at 500 K. Maintain this temperature throughout this Exploration. 2. Select Hydrogen gas from the list box. Record the most probable particle speed and the average particle

41. ## Chemistry

I am really lost with this. Calculate the amount of energy released in kJ/mol for the fusion reaction of two 1H atoms to yield a 2H atom and electron: 1/1H+1/1H→2/1H+0/1e The atomic masses are 0/1e (0.0005486 u), 1H (1.00783 u), 2H (2.01410 u), and 3He

42. ## Physical Science

Need help with these questions: 1.When a calcium atom forms an ion, it loses two electrons. What is the electrical charge of the calcium ion? A.-2 B.-1 C.+2 D.+1 2.Which particle builds a static electrical charge when it is transferred from one object to

43. ## chemistry

using data in table 6.5, calculate the densities of (spherical) atoms of potassium and calcium and compare to the listed densitites of these metals K=39.10 amu, .231 nm (atomic radius) Ca= 40.08 amu, .197nm (atomic radius)

1.What would happen to poisonous chlorine gas if protons were added neutrons were added 2. Boron is 80.20% boron -11 (atomic mass = 11.01 amu) and 19.80% of some isotope form of boron. What must the stomic mass of this second isotope be in order to account

45. ## chemistry

what is the mass in grams? a) 3.011 x 10^23 atoms F b)1.50 x 10^23 atoms Mg c)4.50 x 10^12 atoms Cl d)8.42 x 10^18 atoms Br e) 25 atoms w f) 1 atom Au can you please explain a and b to me then i'll come back later and see if i did the rest right? Thanks in

46. ## Chemistry

Calculate the mass defect and the binding energy/nucleon of the nuclide 9/4 Be which has a mass of 9.012 182 24 amu. The mass of a proton is 1.007 276 47 amu and the mass of a neutron is 1.008 664 90. one amu= 1.6605*10^-27 and the speed of light is

47. ## chemistry

A hypothetical element has two main iso- topes. One has a mass of 35 amu and the other has a mass of 37 amu. If the atomic weight of this element is 35.55 amu, what is the percent abundance of the 37 amu isotope?

48. ## chemistry

Knowing that the Atom X mass is equivalent to 6 boron 10 atoms, what is the relationship between the masses of atom X and the carbon atom 12?

49. ## Physics

The HCl molecule consists of a hydrogen atom (mass 1u) and a chlorine atom (mass 35u). The centres of the two atoms are separated by 127pm (=1.27x10-10m). What is the moment of inertia, I, about an axis perpendicular to the line joining the two atoms which

50. ## Physics

The HCl molecule consists of a hydrogen atom (mass 1u) and a chlorine atom (mass 35u). The centres of the two atoms are separated by 127pm (=1.27x10-10m). What is the moment of inertia, I, about an axis perpendicular to the line joining the two atoms which

51. ## physics

In ammonia (NH3) molecule, the three hydrogen atoms form an equilateral triangle, the distance between the centers of the atoms being 16.28x10^-11 m, so that the center of the triangle is 9.40x10^-11 m from each hydrogen atom. The nitrogen atom is at the

52. ## physics

A water molecule consists of an oxygen atom and two hydrogen atoms. Oxygen has a mass of 16 atomic units (u) and each hydrogen has a mass of 1 u. The hydrogen atoms are each at an average distance of 96 pm ( 96 x 10 -12 m) from the oxygen atom, and are

53. ## Chemistry

I have realized I don't understand Avagado's number at all My book shows me this diagram instead of just providing a simple formulas that makes no sense at all here is what I have made sense of so far (6.022 x 10^23 atoms/mol)(mass of element) = molecular

54. ## chemistry

1state relative mass and charge of an electron 2 an atom of an element X may be written as 4X^9 (a)What does the figure 9 indicate? (b)what is the number of protons in an atom X? (c)what is the number of electrons in an atoms X? (d)what does the number 4

55. ## chemistry

how many atoms of CA is found in the mineral Hydroxyapatite( Ca5OH(PO4)3 How many atoms of H is found in the mineral Hydroxyapatite, How many atom of O in Hydroxyapatite, How many atom sof P, and has a molar mass mass of___________?

56. ## chemistry

Magnesium has three naturally occurring isotopes: Mg-24 with mass 24.3050 amu and a natural abundance of 78.99 %, Mg-25 with mass 24.9858 amu and a natural abundance of 10.00 %, and Mg-26 with mass 25.9826 amu and a natural abundance of 11.01 %. Calculate

57. ## chemistry

The mass of an individual atom of calcium is 40.08 amu. How many atoms would weigh a total of 15.46 g of this element if the mass of 1 amu is 1.6605x10-24 g?

58. ## chemistry

the mass of an individual atom of fluorine is 19 amu. how many atoms would weigh a total of 1.7455x10-3g of this element if the mass of 1 amu is 1.6650x10-24

59. ## Physical education

we have a lithium atom (atomic mass m = 6 amu) connected to two very much more massive atoms, as illustrated in the drawing below. We can pretend that the massive atoms don¡¯t move. The spring constants k1 and k2 are 73 N/m and 27 N/m, respectively. What

60. ## science(conversion factors)

Imagine a particle of dust that masses 25.48ug. What is it's mass in atomic mass units? Round off to appropriate # of significant figures. The answer given in this physics book (Teqnichally not physics hence the conversion subject) is 1.54e19amu I

61. ## Chemistry

Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d) one zinc atom for every

62. ## chem

mass of element = 311.1269 amu what is mass of 1.36 moles of these atoms in g Hint: (1 mol = 6.022 x 1023 atoms) and (1 amu = 1.6606 x 10-24 g) HELP!

63. ## chemistry

How much energy in MeV is released to form one atom of 87Rb from protons, electrons, and neutrons if the nucleus has a mass of 86.909187 amu? The masses of the proton, electron and neutron are 1.00728 amu, 0.000549 amu and 1.00867 amu, respectively.

64. ## chemistry

in the formula for calcium bromide (CaBr2), what does the subscripted two indicate? A. the bromide atom has a charge of 2- B. the bromide atom has a charge of 2+ C. there are two bromide atoms for every calcium atom. D. there are two calcium atoms for

65. ## Atoms

You discovered a new atom! Wow, everyone at your lab is impressed!! Some are saying you may be nominated for the Nobel Prize in Medicine!!! If this is going to happen, you have to find out as much about the atom as you can, and you don’t have long to do

66. ## Chemistry

A mixture containing 11.9 g of calcium fluoride and 10.3 g of sulfuric acid is heated to drive off hydrogen fluorid. Given the following reaction what is the me maximum number of grams of hydrogen fluoride that can be obtied? Ca: 40.0 amu F: 19.0 amu H:

67. ## chemistry

what is the mass in grams? a) 3.011 x 10^23 atoms F b)1.50 x 10^23 atoms Mg c)4.50 x 10^12 atoms Cl d)8.42 x 10^18 atoms Br e) 25 atoms w f) 1 atom Au can you please explain a and b to me then i'll come back later and see if i did the rest right? Thanks in

68. ## Chem---DrBob222

Calculate the oxidation # for each atom in the molecule below. Can you help me with the rest. Thank you!!! H H H H / / / / H -- C ---C ===C ----N .. / / H H Group # # of E Oxidation # H 1 0 1 x 7 = 7 C 4 7 C 4 C 4 N 5 3 H atom attached to first C atom. 1 H

69. ## Chemistry

If a sample of Co2(CO)8 is found to contain 6*10^-2 mol of C atoms, how many grams of Co atoms are present? Molar Mass (g/mol) Co2(CO)8 - 341.95 Co atom - 58.933 C atom - 12.011 O atom - 15.999 Avaogadro's No.: 6.022*10^23 Do I need to use the 6*10^-2 mol

70. ## Chemistry

Calculate the mass defect and the binding energy/nucleon of the nuclide 9/4 Be which has a mass of 9.012 182 24 amu. The mass of a proton is 1.007 276 47 amu and the mass of a neutron is 1.008 664 90. one amu= 1.6605*10^-27 and the speed of light is

71. ## chemistry

using the conversion of mass if the reactant has 4 atoms of calcium how many atoms of calcium will the product have?

72. ## Chemistry

23. Ductility is the ability to be hammered into sheets.- F? 25. A monatomic ion contains only one atom.- T 26. Iron (II) means the iron would have an oxidation number of +2.- F? 27. A polyatomic ion is a group of atoms acting as a single ion.- T 30. The

73. ## Physics

I'm sorry if it's a lot, but I want to make sure I didn't do any mistakes on this worksheet. Thanks!!1. If the mass of a Ne-20 atom is 19.9924 amu, calculate its binding energy. (I got 2.578 x 10^-11 Joules)2. If the mass of a Ca-40 atom is 39.9626 amu,

74. ## CHEM

Magnesium has an average atomic mass of 24.3068 amu and has three isotopes: 24Mg(23.985045 amu), 25 Mg (24.985839 amu) and 26 Mg(25.982595 amu) The 26 Mg isotope has an abundance of 11.1%. what are the abundances of the other two isotopes. Please show work

75. ## chemistry

Can someone please explain to me how to find the energy released? Given the overall reaction that takes place when hydrogen is burned in a young star, how much energy in MeV is released per He nucleus formed? masses: 1-H atom= 1.007amu 4-He atom= 4.002 amu

76. ## Physics

A sealed container of volume 0.10 m3 holds a sample of 3.0 x 10^24 atoms of helium gas in equilibrium. The distribution of speeds of helium atoms shows a peak at 1100 ms-1. Caluculate the temperature and pressure of the helium gas. (helium atom 4.0 amu)

77. ## Science

If a neutral atom has a mass of 12 amu and an atomic number of 5, what is the number of protons, neutrons, and electrons in the atom?

what mass of lead (ii) iodide (pbl2, mass=461 amu)is precipitated by the addition of an excess of potassium iodide (ki, mass=166 amu)to 50.0 ml of 0.60 m lead (ii) nitrate (pb(no3)2, mass=331.2 amu)?

79. ## Physical Science

Plse help i need so much help on thes questions i am SO confused 10. What is stucturally diffrent between an atom and an ion? 13. If prontons and neutrons have the same mass wat is the approximate mass of apronton and nuetronin atomic mass units (amu)? 16.

80. ## Atoms. Atoms.

YOU DISCOVERED A NEW ATOM! WOW, EVERYONE AT YOUR LAB IS IMPRESSED!! SOME ARE SAYING YOU MAY BE NOMINATED FOR THE NOBEL PRIZE IN MEDICINE!!! IF THIS IS GOING TO HAPPEN, YOU HAVE TO FIND OUT AS MUCH ABOUT THE ATOM AS YOU CAN, AND YOU DON’T HAVE LONG TO DO

81. ## Chemistry (Check)

Classify each of these statements as always true, sometimes true, or never true 1)___AT_____A mole of a pure substance contains 6.02 X 1023 atoms. 2)____ST____The representative particle of a compound is the molecule. 3)___NT_____A mole of CCl4 is composed

82. ## Chemistry

Calculate the mass defect and the binding energy/nucleon of the nuclide 9/4 Be, which has a mass of 9.01218224 amu. The mass of the proton is 1.00726747 amu and the mass of the neutron is 1.00866490 amu. I've gotten this far... mass of proton + mass of

83. ## Chemistry

Congratulations! You have discovered a new element called Bhauzium (Bz). The average atomic mass of Bz was found to be 348.72 amu and its atomic number is 123. a) if the atomic masses of three isotopes of Bhsuzium are 342.92 amu, 356.43 amu (6.52%), and

Although Rutherford's model was highly successful, scientists realized that it was incomplete. For example, hydrogen atoms contain one proton, and helium atoms contain 2, yet a hydrogen atom has only 1/4 the mass of a helium atom. I'm not comprehending

85. ## chemistry

How would you caculate this problem: What is the mass in grams of 150*10^12 iron atoms, each having a mass of 56 amu?

86. ## Electrochemistry

A current of 2.50 A is passed through a solution containing Cu+2 ions for 4.00 hours. Calculate the mass of Cu atoms that form at the cathode. Charge= current*time Convert the charge in coulombs to number of electrons. Since it takes two electrons per Cu+2

87. ## chemistry

How do you calculate the mass, in amu of 2287 atoms of Li

88. ## chemistry help

ok so i need to find how many atoms make up the earth. the average atomic mass of the atoms is 14g/mol. avogadro's number gives the number of atoms in a mole. so what atom do i take?? carbon or something??

89. ## chemistry

What is the mass in grams of 9.00×10^14 iron atoms, each having a mass of 56 { amu}?

90. ## chem

The diameter of a neutral neon atom is about 1.4 multiplied by 102 pm. Suppose that we could line up neon atoms side by side in contact with one another. Approximately how many neon atoms would it take to make the distance from end to end 1 cm? I got

91. ## Bio

1. An isotope is an atom of an element that varies in mass number due to variation in the number of: A. atoms. B. protons. C. neutrons. D. electrons. is it C 2, A covalent bond is: A. the attraction that one atom has for another atom. B. the attraction

92. ## Physical science

What happens when an atom gives up loosely held valence electrons to another atom? A. The two atoms form a mixture. B. A chemical bond forms between the two atoms. C. A chemical compound splits into separate elements. D. The two atoms combine to create an

93. ## Chemistry

'calculate the mass in amu of 2.879 1023 xenon atoms'

94. ## scince

One molecule of water (H2O) contains two atoms of hydrogen and one atom of oxygen.A hydrogen atom has a mass of 1.0 u and an atom of oxygen has a mass of 16 u, approximately. (a) What is the mass in kilograms of one molecule of water? (b) How many

95. ## Chemistry

How much energy in KJ is release to form one mole of 123Sb from protons and neutrons if the atom has a mass of 122.90422 amu? Please remember to include the mass of electrons in calculations.

96. ## physical science

calculate the molar mass ofthe substance. divide it by Avogadros number (6.02x10 to 23 power) .)Hydrogen2 2/(6.02 x 10^23) = ?? hun i don't get it the teacher said first H2x1.00 and then (6.02xio^23) but i still don't get it can you help? I assume you

97. ## chemistry

What combination of atoms are involved in this compound? KCl A.1 potassium atom and 2 chlorine atoms B.2 potassium atoms and 1 chlorine atom C.1 potassium atom and 1 chlorine atom D.2 potassium atoms and 2 chlorine atoms

98. ## Physics

Vertical beam of mercury (Hg atomic mass =202u) atoms emerges from the oven kept at T= 400K. Consider three atoms, emerging from the oven: one with the average speed, one with the rms speed, and the other with the most probable speed of the Maxwellian

99. ## Physics

A helium-4 atom falls from a height h into a tank of gaseous helium atoms at 300 K. What is h in meters if the temperature of the helium atoms remains at 300 K after the falling atom enters the tank? Details and assumptions The acceleration of gravity is

100. ## Astronomy

Mass of the Sun = 1.989 x 10^30 kg Mass of Hydrogen Atom = 1.00794 grams If we assume the Sun is made totally of hydrogen, how many hydrogen atoms are contained within the Sun? If the Sun converts hald of these hydrogen atoms into helium over its lifetime