what kinds of atoms form the molecules for each element...please help me

26,549 results
  1. Physical Science 10A U4L5

    When iron rusts and forms iron oxide, the iron oxide has more mass than the iron. Which statement correctly explains this observation? The iron atoms in iron oxide have more mass than pure iron. There are more iron atoms in iron oxide than in pure iron.

  2. chemistry

    are these right? How many atoms are there in 1.3x10^22 molecules NO2? atoms=(1.3x10^22 molecules NO2) x (2atoms/1molecule) = 2.6x10^22 atoms NO2 A 5.0g sample of O2 is in a container at STP. How many atoms of oxygen are in the container? atoms = (5.0g O2)

  3. Ap Biology

    During aerobic respiration, glucose is broken down to form several end products. Which end products contain the carbon atoms from glucose? The hydrogen atoms from glucose? The oxygen atoms from glucose? The energy stored in the glucose molecules?

  4. chemistry

    Question 1. A Compound Containing 3 Atoms Of Carbon & 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The 2 End Products Of This Equation Are Carbon Dioxide &water. What Element Should You Look At 1st In Balancing This Equation? Choose

  5. Chemistry

    You find a compound composed only of element x and hydrogen,and know that it is 91.33% element x by mass. Each molecule has 2.67 times as many H atoms as x atoms. What is element x ?

  6. biology

    Choose the total number of each item requested below. 4C6H12O6 Carbon atoms Hydrogen atoms Oxygen atoms Molecules

  7. Chem

    How many chlorine atoms are in 5.0 g of C2H3Cl3O2? What mass of C2H3Cl3O2 would contain 1.0g Cl? There are 6.02 x 10^23 atoms in a mole of anything. Calculate the molar mass of your compound, that mass will contain 6.02 x 10^23 molecules of that material

  8. science

    how do liquid water, ice, and water vapor differ from one another? A.) They are different states of matter B.) They are different compounds C.) They are made of different kinds of molecules. D.) They are mad of different kinds of atoms.

  9. Science

    Ionic bonds: a. result from the sharing of electrons between atoms. b. form only between polar molecules. c. form between atoms that develop opposite charges. d. result from the natural repulsion that develops between protons. answer is C

  10. Chemistry of Life

    Which statement is true about water molecules? The oxygen atom has a negative charge. The hydrogen atoms do not share electrons. Water molecules move randomly around each other. Water molecules cannot dissolve many substances. Question 2. How does water

  11. science

    A change in _____ means that a chemical reaction has occurred. A) the energy and mass B) the kinds of atoms involved C) the properties and identity of the reacting substances D) the energy and kinds of atoms of the reacting substances

  12. chemistry

    Examine the scenario. A magnesium (Mg) atom gives one electron to two atoms of another element, and takes on a 2+ charge. The two atoms of the other element each form a 1− charge. As a result, the magnesium ion and the two ions of the other element

  13. CHEMISTRY

    An element X with electronic configuration 2,8,2 ionises to a configuration of 2,8 when it combines with another element Y of configuration 2,8,7? (i) state the type of bonding formed between the two elements. (ii) write a simple ionic equation to

  14. Science

    The energy from the Sun that reaches Earth is the result of which of the following processes, repeated many times in the core of the Sun? A) The nuclei of two atoms are combined to form a single atom with a larger nucleus. B) Molecules are rearranged to

  15. chemistry--please check

    1. What type of bond holds the atoms together within a single molecule of water? a. Hydrogen bonds b. Nonpolar covalent bonds c. Polar covalent bonds *** d. Ionic bonds 2. Where are covalent bonds found? a. Both between and within organic and inorganic

  16. 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

  17. chemistry

    Predict the number of atoms of each element that would be needed to form a molecule of cadmium sulfide?

  18. Chemistry

    How do atoms bond to form molecules?

  19. Science-Chemistry

    Analysis questions: A) What evidence is there that the gas bubbles formed in the first part of the investigation were hydrogen gas? Answer: Evidence there was that proved that the gas bubbles formed in the first part of the investigation were hydrogen gas

  20. chem

    when a chemical reaction takes place, the number of atoms of each element in the reactants (blank) the number of atoms of each element in the products

  21. Science

    What best explains why carbon is present in so many kinds of molecules? A- It is abundant on earth B- It can form four covalent bonds C- It has valence electrons D- It can become ion I think it is B, however, I am unsure!

  22. science

    plz check Radioactive decay occurs when atoms - lose mass - join with atoms of another element*** - break down to form atoms of another element - are exposed to to chemical weathering i think B

  23. Chemistry

    A compound containg 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide (CO2) and water. What element should you look at first in balancing this equation? Is

  24. Chemistry

    'Would the probability factor in the rate equation be greater or lower if the particles colliding were individual atoms instead of molecules? ' I want to say it would be lower because atoms have less kinetic energy than molecules due to their lesser mass,

  25. Science

    Lithium atoms, like hydrogen atoms, have only a single electron in their outer shells, yet lithium atoms do not join together to form Li2 molecules the way hydrogen atoms form H2 molecules. Instead, lithium is a metal with each atom part of a crystal

  26. science

    1. which type of matter, that cannot be broken down into simpler substances, makes up all matter in the universe? 2. elements are made of one kind of ____ 3. which of the following is an element a.water b.air c.gold d. soil 4. elements and compounds are

  27. science

    Having a hard time understanding "representative particles". ie. which are atoms, compounds etc. For example, what is the representative particle for sodium fluoride? carbon monoxide? Atoms are the smallest unit of an element. Molecules are composed of two

  28. AP Biology

    During aerobic respiration, glucose is broken down to form several end products. Which end products contain the carbon atoms from glucose? The hydrogen atoms from glucose? The oxygen atoms from glucose? The energy stored in the glucose molecules?

  29. Biology

    |Question| Living organisms are composed of millions of organic compounds, each having a unique structure. What element is responsible for this huge diversity of molecules? Describe the diversity of structures that can be formed and the properties of this

  30. science

    IDK these help pls 1. Which of the following is a compound? A. O2 B. NH3 C. H2O+NaCl D. N2 2. What is the difference between compounds and mixtures? A. Compounds contain only one element; mixtures contain two or more elements. B. Compounds contain two or

  31. Chemistry please help

    State Dalton’s Postulates? In light of modern knowledge, what are the inaccuracies in Dalton’s Postulates? I know Dalton's postulates: -All matter consists of tiny, indivisible particles called atoms that cannot be created or destroyed -Atoms of one

  32. science plzzz help

    From inside to out, describe the components of an atom. What makes one element's atoms differ from another element's atoms?

  33. n Chemistry

    Imagine you were able to "see" atoms and molecules with the help of a fancy pair of "super-goggles". If you saw 25 N2O5 molecules, how many O atoms did you see?

  34. chem

    How many atoms are there in the following problems? which one has the most number of atoms? a. 5 molecuels (NH4)2S b. 9 molecules H2O2 c. 11 molecules O3

  35. Chemistry

    A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. What element should you look at first in balancing this equation? A. oxygen

  36. Algebra

    Joyce combines 9 atoms of hydrogen and 3 atoms of nitrogen to make 3 molecules of ammonia. write a direct variation equation which relates atoms of hydrogen to atoms of nitrogen. How many nitrogen atoms does Joyce need to form ammonia molecules using 51

  37. chemistry

    molecules of two different compounds contain the same number of atoms of each element but have different arrangement of atoms. which term correctly describes these two substances? a) isomers b) isotopes c) polymers d) none of the above

  38. chemistry - ozone

    hi, can anybody tell me the molecules that destroy ozone? i need a fair few molecules to write in my homework...thanks! The main species responsible for destroying ozone in the stratosphere is Cl atoms. Br atoms are also very effective but there aren't

  39. Science

    Can a molecule be an element? Molecules of most elements are made up of only one atom of that element. So, if a molecule is what you get when any atoms join together then no, a molecule can not be an element

  40. chemistry

    elements x and y are from group 7 in the periodic table. x is a liquid at rtp, while y is a solid at rtp. which statements are correct? 1) atoms of y have more protons than atoms of x 2) molecules of y have more atoms than molecules of x 3) y displaces x

  41. Chemistry

    How do you find out the number of moles in a certain amount of grams of a element or compound. After that, how do you find the number of atoms/molecules in that element or compound. Thanks grams/molar mass = # mols There are 6.02 x 10^23 molecules in a mol

  42. Science

    Different materials have properties that are desirable or undesirable for use in an artifical joint. Desirable (D)l Undesirable (UD) l Not Revelant (NR) 1.Chemically Stable (D) 2.Atoms can roll over each other (NR) 3.Consists of long molecules (UD)

  43. chemistry

    Equal masses of gaseous N2 and Ar are placed in separate flasks of equal volume at the same temperature. Tell whether each of the following statements is true or false. Briefly explain your answer in each case. (a) There are more molecules of N2 present

  44. chemistry

    Isotopes (select one or more): are chemicals that react only with protons. for an element have the same chemical properties. are atoms of an element that differ in the number of protons. are atoms of an element that differ in the number of neutrons. for an

  45. Chemistry

    Question 1. A Compound Containing 3 Atoms Of Carbon & 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The 2 End Products Of This Equation Are Carbon Dioxide &water. What Element Should You Look At 1st In Balancing This Equation? Choose

  46. Science

    When elements in the same group form molecules, the number of outer-shell electrons involved is the same and so the number of bonds forming the molecule is the same roo. Eg. Every element in group 2 (groupII) is a solid metal. When these elements bond with

  47. Earth Science (check answers)

    1. The mass number of an atom is obtained by totaling the number of_____and____. a. electrons and protons b. electron and neutrons c.protons and neutrons d.neutrons and isotopes Is it B? 2. Which of the following statements about the chemical combinations

  48. Chemistry 2

    What is the predominant intermolecular force responsible for the dissolution of the hydrophilic end of soap in water? Using dashed lines, illustrate where the intermolecular force occurs between atoms in adjacent molecules? Lone pair electrons have been

  49. biology

    Allegra is a blockbuster allergy medication that generated over $1.8 billion in global sales in 2004. Allegra, or Fexofenadine, decreases allergy symptoms by inhibiting the action of histamines. Histamines are naturally occurring molecules that are

  50. chemistry.

    They are__________Mol of carbon atoms in 4 mol of Dimedthysulfoxide A: 2 B: 6 c: 8 D: 4 E: 3 My answer is C:8 but can any one help me with the method to show the right answer. 2. There are ___________Sulfur atoms in 25 molecules of c4H4S2. My answer is

  51. chemistry

    a compound containing 3 atoms of carbon and 8 atoms ofhydrgen is combined in a reaction with oxegyn molecules the two end products of this equation are carbon dioxide co 2 and water what elemement should i look at first in balancing this equation oxygen

  52. college

    A gas containing both hydrogen molecules (each molecule contains two hydrogen atoms) and helium atoms has a temperature of 300 K. How does the average speed of the hydrogen molecules compare to the helium atoms?

  53. Honors Biology

    Can someone check my work please? We had to fill in the blanks of a short paragraph with the correct keywords, but all these acronyms (I think that's what they're called ;P) confuse me. My answers will be in parentheses. " The Calvin Cycle begins when one

  54. science

    during radioactive decay atoms of a radioactive element break down and change into other atoms of another element-all at once a) true b) false

  55. Chemistry

    How many oxygen atoms are in a) 3.21 x 10^22 molecules CH3OH b) .250 mol C6H12O6 Is it a) 3.21 x 10^22 atoms b) 9.03 x 10^23 atoms

  56. Science

    Im having trouble with reading a chemical equation. ( Numbers on the right side of the element are subscripts ) A) 2SO2 + O2 +2H2O -> 2H2SO4 1. How many total molecules are represented? ( I m having trouble recognizing when it s a molecule or just an

  57. science

    radioactive decay occurs when atoms a) lose mass b) join with atoms of another element c) break down to form atoms of another element d) are exposes to chemical weather

  58. chemistry

    a carbon containing 3 atoms of carbon and 8 atoms of hydrdren combinend in reactionwith oxygen molecules the 2 end products of this equation are carbon dioxide co 2 an water what element should i look at first inn this oxygen hydrogen carbon or dioxide and

  59. science

    How do you find out the number of atoms in a chemical formula? Count up the number of atoms in the formula. If there is a subscript n after an element sytmbol, there are n or those atoms in the molecule. If there is no subscript, there is only one atom of

  60. physical science

    I have been working on my homework for science for a while now and I just wanted to see if I got any questions wrong. Can someone help me by checking what problems i got wrong. My parent told me that I have at least 5 problems wrong. Can someone point them

  61. CHEMISTRY

    what is the symbol for chromium (II) sulfate? You mean the formula? CrSO4 yes! thanx!!!!!! do u know how to find the number of molecules or atoms in a mole? The number of atoms in a mole is called Avogadro's number, the value of which is approximately 6.02

  62. biology

    1 mole of an element or compound contains 6.20 times 10 to the 23rd power atoms or molecules of the element or compound. 1 mole of an element or compound has a mass equal to its mass number (or molecular weight) in grams. For example, 1 mol of hydrogen gas

  63. gen.science

    A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. Which chemical or element will have the largest number of moecules?

  64. chemistry

    Mass of this sample = 3.2 g 1. Iron is... a) An element composed of atoms b) An element composed of diatomic molecules c) An ionic compound d) Made from more than one type of atom 2. How many moles of iron are in the nail?

  65. Chemistry

    A compound containg 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide (CO2) and water. What element should you look at first in balancing this equation?

  66. chemistry

    how many molecules are in 5.5 moles of oxygen gas? How many atoms are in this quantity of gas? I used dimensional analysis and did: 5.5 mol. of oxygen x 6.02x10^23 molecules/1 mol of oxygen I got 3.3x^24 molecules of oxygen How do I find the # of atoms? I

  67. Chemistry

    Question 1. (SEE QUESTION 2 ) A Compound Containing 3 Atoms Of Carbon & 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The 2 End Products Of This Equation Are Carbon Dioxide &water. What Element Should You Look At 1st In Balancing

  68. Biology

    4. The difference between an atom and and element is a. an element is made of atoms b. atoms are made of elements c. atoms are held together by covalent bonds d. none of the above C? 6. Which of the following is NOT an organic compound? a. ATP molecule b.

  69. Biology

    4. The difference between an atom and and element is a. an element is made of atoms b. atoms are made of elements c. atoms are held together by covalent bonds d. none of the above C? 6. Which of the following is NOT an organic compound? a. ATP molecule b.

  70. 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

  71. chemistry

    36 colored paper clips (12 each of 3 different colors) 1.Each paper clip represents a single atom. Designate a different color of paper clip to represent atoms of oxygen (O), hydrogen (H), and carbon (C). Makes two molecules each of hydrogen (H2) and

  72. chemistry

    Which of these elements has the electonic configuration of The energy absorbed or released when an electron is added to a gaseous atom is known as Which of these elements behave partly as an alkaline metal as well as a halogen element? Hydrogen can be

  73. Chemistry

    The relative number of elements and compounds in a chemical equation are represented by either coefficients, subscripts, charges of phase symbols. I think it's coefficients, but is this right? My other question is that if you start a reaction with four

  74. science

    what kinds of atoms form the molecules for each element...please help me

  75. chemistry

    my ques ok a coumpond containing 3atoms of carbon an 8 atoms ofhydrogen combined in reaction with oxy molecules the two end products of this equation are carbon dioxide co2 an water wat element should i look at first in balancing this question and wen i

  76. Chemistry

    A compound containg 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide (CO2) and water. What element should you look at first in balancing this equation? Is

  77. general science

    A Compound Containing 3 Atoms Of Carbon And 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The Two End Products Of This Equation Are Carbon Dioxide And Water. What Element Should You Look At First In Balancing This Equation?

  78. 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

  79. 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

  80. Chemistry

    Question 1. A Compound Containing 3 Atoms Of Carbon & 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The 2 End Products Of This Equation Are Carbon Dioxide &water. What Element Should You Look At 1st In Balancing This Equation? Choose

  81. Science-Chemistry

    Analysis questions: A) What evidence is there that the gas bubbles formed in the first part of the investigation were hydrogen gas? Answer: Evidence there was that proved that the gas bubbles formed in the first part of the investigation were hydrogen gas

  82. chem

    How many atoms are there in the following problems? which one has the most number of atoms? a. 5 molecuels (NH4)2S b. 9 molecules H2O2 c. 11 molecules O3

  83. Science

    Examine the false statement. Compounds are the smallest unit of an element that occur most commonly in nature. Select the rewording of the statement that is true. Compounds are the smallest unit of an element that occur on the periodic table. Molecules are

  84. Chemistry

    Atoms stick together in bonds to form molecules. What is responsible for this sticking? Thank you.

  85. chemistry

    Which of the following elements can form single, double, and triple bonds with other atoms of the same element?

  86. science

    On the microscopic scale, internal energy is correctly defined as energy stored in the __________. bonds between atoms, but not in the motion of atoms motion of objects visible to the eye motion of atoms, and the bonds within atoms and molecules motion of

  87. Chemistry

    How do orbitals on individual atoms interact and change when covalent bonds form in molecules?

  88. chemistry

    I have absolutely no clue how to approach this question please help. The destruction of the ozone layer is an issue that is being discussed all around the world. Freons, or chlorinated hydrocarbon molecules, are very stable on the ground, but in the upper

  89. Physics Help Please

    Scientists at Oak Ridge National Laboratory confirmed the existence of element 104 by creating 3000 atoms of it. If radioactive decay caused the number of atoms to drop by half within 4.0 s, how many atoms were left after 12 s? Show work please! Thank you!

  90. Science

    Which of the following statements is true?Immersive Reader (7.5 Points) Atoms are made of molecules. b. Atoms can join to form molecules. c. Atoms contain more than one element. d. Some atoms do not have protons.

  91. Science

    Can an element be separated from a compound? Can an element form a compound? The reaction of zinc metal and hydrochloric acid creates hydrogen gas, an element. if we create this element in a tube what property of this element requires us to keep the tube

  92. chemistry

    molecules of two different compounds contain the same number of atoms of each element but have different arrangement of atoms. which term correctly describes these two substances? a) isomers b) isotopes c) polymers d) none of the above

  93. chemistry

    How do I calculate the number of atoms in a compound (not an element)? I have the mass of the amount of substance, and the molar masses. How do I do this? Is this the same as calculating the number of molecules/ formula units? Also, I know the number of

  94. science

    I wonder what atoms are and what molecules of two element/compounds are?

  95. chemistry

    Why is there one large increase in ionization energies for each element? Which atoms form ions that are larger than the atoms? I have a test tomorrow and these are the questions I have troubles understanding.

  96. chemistry

    How do atoms bond to form molecules?

  97. Chemistry

    An element has a body centred cubic structure with edge cell of 288 pm .The density of the element is 7.2 g/cm3.How many atoms are present in 208g of the element.

  98. PNU

    An element has a body-centered cubic(bcc) structure with a cell edge of 288pm the density of the element is 7.2g/cm3. How many atoms are present in 208g of element

  99. How do I calculate the number of atoms in a compou

    I have the mass of the amount of substance, and the molar masses. How do I do this? Is this the same as calculating the number of molecules/ formula units? Also, I know the number of atoms for each element in the compound (It made me calculate that before)

  100. Science

    Can an element be separated to form a compound? Can an element form a compund? I think it's a yes to both of the above questions. An element can form a compound by combing with another element.

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