How does the law of conservation of matter apply to chemical equations? A. The sum of the coefficients on each side of the equation must be the same. B. The sum of the atomic masses on both sides of the

33,690 results
  1. Physics

    Please Help ! A child throws a snowball at a tree and it sticks to the tree. Does this motion defy the Law of Conservation of Momentum? Explain. The Law of Conservation of Energy states: "If there is no net force acting on a system of objects, the total

  2. Chemistry

    Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g) delta H1? MgO(s) + 2HCl(aq) ->MgCl2(aq) + H2O(l) delta H2? To make these equations add up to the formation reaction of MgO, you will need to include the following: H2(g) + 1/2O2(l) delta H =-241.8 kJ Using Hess's Law

  3. Science

    1. Which of the following statements about Newton's Third Law is the most true? a The forces acting upon two objects are dependent on the initial velocities of the objects b The law of conservation of momentum is obeyed in all systems c The two objects

  4. Science

    We know that the law of conservation of energy states that energy can not be created or destroyed. It only changes form. Consider this energy transformation diagram. Assume that the energy input in this case is chemical potential energy and the useful

  5. Earth and Space Science

    According to the law of conservation, both energy and matter are created* in natural systems. Earth as a whole is an open* system, in which energy and matter can move from one subsystem to another. As energy and matter are transferred between subsystems,

  6. chemistry--please check

    1. A spontaneous chemical reaction requires higher temperatures to occur has no activation energy occurs without any input of energy *** increases entropy 2. S is the total kinetic movement in a system the full range of motions in a system*** the average

  7. Science-Chemistry

    1. What is Charles’s law? • State the definition of the law in words. • What are the assumptions of Charles’s law? • Write mathematical equations that represent the law. • What can you do with Charles’s law? • Using a gas-filled balloon as

  8. chemistry

    How many of the following are true concerning balanced chemical equations? I. The number of molecules is conserved. II. The coefficients for the reactants tell you how much of each reactant you are given. III. Atoms are neither created nor destroyed. IV.

  9. Physics

    According to conservation of momentum, when two objects collide, the momentum lost by one object equals the momentum gained by the other. Give a common-sense, non-mathematical explanation of the connection between Newton’s 3rd law and momentum

  10. Science

    1.Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many atoms will there be in the product of this reaction?(1 point) A. 20 B. 30*** C. 10 D. 15 2.Which procedure could be used to

  11. Science

    Which option states the principle behind the law of conservation of mass and the law of conservation of energy? An object's energy and mass have a direct relationship with that object's temperature. An object's energy and mass have an indirect relationship

  12. physics (thanks)

    in the context of the loop and junctions rules for electrical circuits a junction is: a) where a wire is connected to a resistor b) where a wire is connected to a battery c) where only two wire are joined d) where three or more wire are joined e) where a

  13. Chemistry

    Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine,

  14. Physics

    How do I use Kirchhoff's First Law -- the law of conservation of energy and the law of conservation of charge to prove the equivalent resistance formula. Rt = R1 + R2 + R3 ......

  15. History

    The rule of law, established by Hammurabi, was the idea that a.) different laws apply to people of different social ranking b.) all members of society, even the rich and powerful, must obey the law c.) there is no difference between civil and criminal law

  16. Science

    1. Which of the following is an example of matter A.Leaves B.Shadows C.Light from the sun D.Sound

  17. Science

    1.Which of the following is an example of matter? Leaves*** Shadows Light from the sun Sound 2.Which of the following is an example of a chemical property of matter? Ability to melt**** Ability to freeze Ability to react Ability to break 3. The physical

  18. Chem

    Which of the following are true regarding balancing chemical equations? A It takes practice in the form of trial and error to balance chemical equations B The law of conservation of matter should be applied by counting the number of atoms of every element

  19. physics question

    The sum of the emfs and potential difference around a closed loop equals zero" is a consequence of: a) Newton's third law b) Ohm's law c) Newton's second law d) conservation of energy e) conservation of charge For this question: I had picked d conservation

  20. Science

    The law of conservation of energy states that energy can neither be created nor destroyed. In many instances it may look as though energy is gained or lost, but it is really only changed in form. How is the law of conservation of energy represented when an

  21. Physics

    Bernoulli's equation is an expression of: the conservation of mass the conservation of total energy the conservation of kinetic energy the conservation of momentum the conservation of velocity My ans: the equation states that it should be a constant when

  22. Chemistry

    a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine,

  23. Physical science

    How does the law of conservation of matter apply to chemical equations? A. The sum of the coefficients on each side of the equation must be the same. B. The sum of the atomic masses on both sides of the equation must be the same.** C. The sum of the atomic

  24. science

    Describe a fourth scenario in which either the Law of Conservation of Matter or the Law of Conservation of Energy could be observed. Using as many sentences as needed, describe how an experiment could be set up to further explore your recorded observation.

  25. science

    Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many atoms will there be in the product of this reaction? A.15 B.30 C.20 D.10

  26. Physics

    A particle of mass m1 = 2.5 kg moving along the x axis collides with a particle of mass m2 = 4.9 kg initially at rest. The incoming particle is deflected in the direction 22 degrees above the x axis, whereas the target particle moves off at 15 m/s at 37

  27. Science

    How is the law of conservation of mass used to balance a chemical equation? In a chemical equation, the products formed have the same atoms as the original reactants; however, the atoms may be rearranged. The law of conservation of mass states that the

  28. Chemistry

    1. What is Boyle’s law? State the definition of the law in words. What are the assumptions of Boyle’s law? Write mathematical equations that represent the law. What can be calculated using Boyle’s law? Using a bicycle tire pump as an example,

  29. Science

    Which of the following statements is a consequence of the equation E = mc2? A) Energy is released when matter is destroyed. B) The law of conservation of energy must be modified to state that mass and energy are conserved in any process. C) Mass and energy

  30. Chemistry

    a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine,

  31. Chemistry balancing equations

    Translate each of the following reactions into complete balanced chemical equations using international symbols & include states of matter at SATP. Assume pure states of matter unless otherwise indicated. I really need help with this stuff please. 1. The

  32. science

    1. Identify the phase or phases of matter (solids, liquids, and gases) that apply to each statement. More than one phase of matter may apply to each statement. a. Molecules do not move around, but vibrate in place b. Has volume but no particular shape c.

  33. chem

    How does the law of conservation of matter apply to chemical reactions?

  34. science

    How does the law of conservation of matter apply to mixtures? The law of conservation of matter is a law that states matter cannot be created or destroyed. But how does that affect mixtures HELPPPPP

  35. new Q science

    Give an example of how you've seen the law of conservation of matter in action today. Since we don't know what "you've seen," it is impossible to answer this question. You need to review the law of conservation of matter in your textbook to compare your

  36. science

    An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law? law of conservation of energy law of conservation of mass law of conservation of temperature law of conservation of atoms I know the Answer law of

  37. Science

    Choose all of the chemical reactions which correctly show that chemical reactions must obey the Law of Conservation of Matter. a. CH4 + 2O2 → CO2 + H2O b. H2 + O2 → H2O *** c. C6H12O6 + 6O2 → 6CO2 + 6H2O d. 2CO + O2 → 2CO2 *** e. 4P + O2 P4O10

  38. math

    Analyze the pieces of the chemical reaction. 16 grams CH4 44 grams CO2 64 grams O2 36 grams H2O Organize the reactants (what was present before the reaction) and the products (what is present after the reaction) so that the law of conservation of mass has

  39. Chemistry

    Write balanced chemical equations for all transferals of the compounds from organic to aqueous phases and for all precipitation reactions. **Note: If a compound does not move from one layer to another, no reaction has occurred, and no equation can be

  40. Science

    What is the Law of conservation of matter?

  41. Science

    I need help with 2 questions please. 1.What are the three parts of the law of conservation of mass/matter? Do not need the definition but the 3 laws please. Wikipedia and other sites just gives me the definition of the law of conversation. 2. How are

  42. chem expirement!

    You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a net equation whose

  43. Chemistry

    State the law of conservation of mass. Then apply the law to this question: What would be the total mass of the products of a reaction in which 25 grams of table salt (Sodium chloride) decomposes into the elements sodium and chlorine?

  44. chem experiment:

    You are required to design an experiment to test Hess's law using the combustion of ethanol. Write a brief design for this experiment. What I wrote as my answer: Hess’ Law: is the algebraic addition of chemical equations yields a net equation whose

  45. Science

    Based on the Law of Conservation of Matter, describe the relationship between the mass of the reactants and the mass of the products.

  46. Chemistry

    It is common in this experiment for students to calculate percent yields for the reaction that are above 100%. Is this result a violation of the law of conservation of matter? I need help writing an essay based on this prompt.

  47. physics

    Refering to reaction 2 H2(g) + O2(g) -> 2 H2O(g) and proving that the law of conservation of mass is obeyed during a chemical reaction.

  48. Chemistry

    Given the reaction below, and your knowledge of the "Law of Conservation of Mass", what is the missing product from the chemical reaction? How do you know? Zn(s) + HCl(aq) --> ___ + ZnCl2(aq)

  49. Science

    Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many atoms will there be in the product of this reaction?(1 point) 30 15 10 20

  50. science

    Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many atoms will there be in the product of this reaction?(1 point) 10 15 20

  51. science

    1.in what state of matter are the particles closets together? 2.in what states of matter ha an indefinite shape but not definite volume 3.what state of matter do particles move most freely ? 4.give an ex of chemical change of paper 5.what is the different

  52. Chemistry

    How is the law of conservation used to balance a chemical equation? In a chemical equation, the products formed have the same atoms as the original reactants; however, the atoms may be rearranged with different subscripts. The law of conservation of mass

  53. science

    Are the following data sets on chemical changes consistent with the law of conservation of mass? (a) A 15.0 g sample of sodium completely reacts with 19.6 g of chlorine to form 34.6 g of sodium chloride. the answer is yes, because 15 and 19.6 add up to

  54. Physics

    A certain number of identical resistors are connected in series and their total resistance is measured. When the resistors are disconnected and re-connected in parallel, their total resistance drops to one-percent of the value measured when they were

  55. Science

    Which of the following statements is a consequence of the equation E=mc^2? A. Energy is released when matter is destroyed B. Mass and energy are equivalent C. The law of conservation of energy must be modified to state that mass and energy are conserved in

  56. Science

    I need help with a a school science test held tommorrow. Its about chemical equations and I was wondering if someone can explain to me how to add ions and valencies when adding chemical equations? Any help would be greatly appreciated

  57. physics

    Which of the following statements is a consequence of equation E=mc^2? Energy is released when matter is destroyed Mass and energy are equivalent The law of conservation of energy must be modified to state that mass and energy are conserved in any process

  58. physics

    A 0.200 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? (b) What fraction of the original kinetic

  59. science

    In a chemical reaction,10.g of sodium carbonate reacted with 12 g of ethanoic acid.the poducts were 4.4g carbon dioxide,1.8g of water and 16.4g of sodium ethanoate. (a) write a word equation ,clearly showing the reactants and products as given above. (b)

  60. History

    Which statement best evaluates the connections between water conservation and land conservation projects? A.Water and land conservation are both nice efforts but have little practical use. B.Water conservation is more important than land conservation

  61. Reply to grant about a regression problem

    This is a reply to the question posted here http://www.jiskha.com/display.cgi?id=1178989522 As I explained there, you can find the parameters by defining: x1 = Sin(0.49 t) x2 = Cos(0.49 t) and treat this as an ordinary linear regression problem. If we

  62. science

    What do you mean by law of conservation of energy. Use this law to find speed of an object just before hitting the ground if it is allowed to fall through a height of 19.6m.

  63. chemistry

    An alka-seltzer tablet weighing 3 grams is added to a flask of water (weighing 250 grams).At the end of the experiment, the flask weighs a total of 249.6 grams.Explain why this experiment does not seem to follow the Law of Conservation of Mass and how the

  64. science

    Which change is chemical? water boiling water undergoing electrolysis*** water freezing water evaporating Which number remains unchanged during photosynthesis? the number of carbon atoms*** the number of water molecules the number of glucose molecules the

  65. Chemistry

    Describe what hard water is and how a water softening unit works. Provide balanced chemical equations to show how sodium sulphate can remove these ions (Magnesium and Calcium). The first was no problem, but I am having trouble trying to get through the

  66. chemistry

    a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine,

  67. Chemistry

    a) Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine,

  68. science

    As a result of the law of conservation, during a chemical change the mass of the products is equal to the mass of the ? mass of the products = mass of the reactants.

  69. science

    HELP ASAP 1) which change is chemical? • water undergoing electrolysis •water freezing •water evaporating •water boiling 2)which number remains unchanged during photosynthesis • The number of glucose molecules • The number of carbon atoms •

  70. Physics

    Alcohol flows smoothly through a horizontal pipe that tapers in cross-sectional area from A1 = 41.9 cm2 to A2= A1/3. The pressure difference Äp between the wide and the narrow sections of the pipe is 11.1 kPa. What is the volume flow rate ÄV/Ät of the

  71. Chemistry

    The law of conservation of mass states that no change is observed in the total mass of the substances involved in a chemical change. Thus the mass of the sulfur dioxide produced is the same amount as the sulfur and oxygen that went in. Does this sound

  72. Anatomy and physiology

    1)Why is enzymatic catalysis essential for life? Describe in detail the mechanism for enzyme mediated anabolic and catabolic reactions. What are the various modes of inhibition. 2) "every energy transfer increases the entropy of the system" .why? (hint-

  73. science

    1. Which of the following is an example of matter? A. leaves

  74. science

    Based on the Law of Conservation of Mass, how many grams of Magnesium will react with 16.0 grams of Oxygen to produce 40.3 grams of Magnesium Oxide. * 1 point 56.3 g 24 g** 24.3 g Which chemical equation shows that no atoms were lost during a chemical

  75. Physics

    If we examine a ball in free fall, we find that the momentum of the ball is not constant. This is not a violation of the law of conservation of momentum because A) the force of gravity acts on the ball. B) the ball experiences an external force. C) the

  76. Science (SoftChalk)

    Which of the following determines the physical and chemical properties of a substance? [mark all correct answers] a. Size b. Atomic Structure c. Amount of Matter d. Molecular Structure e. Volume of Matter

  77. Chemistry

    The statement "matter can be neither created nor destroyed by chemical means, but it can be changed from one form to another" is the chemical law of A. definite proportions. B. atomic disintegration. C. conservation of energy. D. conservation of matter. im

  78. science

    How does a chemical equation support the law of conservation of matter?

  79. Science

    The law of conservation of _____ states that all particles must be equal before and after the reaction. word bank:elements, magnitude matter,mass,stress ,gradual chemical,physical ,weight.

  80. Science

    Using the law of conservation of matter, explain why there is no “away” when dealing with the issue of pollution. Any chemical reaction yields a product mass equal to the reactant mass.

  81. Science 8R - help

    How does the Law of conservation of energy compared to the conservation of matter? please help

  82. science

    i need a picture that explains the law of conservation of matter

  83. physics

    kirchhoff's first law is another way of expressing the: a)conservation of momentum b)fact that the magnetic field is solenoidat c)conservation of charge energy conservation

  84. Chemistry

    can anyone explain how does the balanced chemical equation show the law of conservation of mass?

  85. SCIENCE

    I have 2 questions that I need help with please. 1.What are the three parts of the law of conservation of mass/matter? Do not need the definition but the 3 laws please. 2. How are velocity, speed, and acceleration related? I know how they are different

  86. chem

    use atomic theory to explain why chemical reactions obey the law of conservation of mass

  87. Physics

    According to conservation of momentum, when two objects collide, the momentum lost by one object equals the momentum gained by the other. Give a common-sense, non-mathematical explanation of the connection between Newton’s 3rd law and momentum

  88. Chemistry

    When We Balance Equations In Chemical Reaction,we Are Obeying The Law Of

  89. Chemistry

    Describe how you can show that a chemical reaction adhers to the law of conservation of mass. Chemical reaction: magnesium hydroxide added to phosphoric acid produces magnesium phosphate and water. Find the mass percentage of each compound as well as the

  90. SCIENCE

    According to the law of conservation of mass, how does the mass of the products in a chemical reaction compare to the mass of the reactnats?

  91. Chemical / Physical Changes Quiz check my answers

    1. A ____________________ occurs when two or more substances interact forming a new substance. A. Physical change B. Chemical change **** C. Ecosystems D. Physical reaction 2. Is iron rusting a Physical or Chemical Change? A. Physical Change B. Chemical

  92. biology

    Apply the Law of Conservation of Energy to food. Trace the energy from its beginning point, to the point where it was stored or used.

  93. Physics

    Could you please check my answers and help me with some? 1. What does it mean to say a physical quantity is conserved? Why is this idea useful? (I don't understand how it is useful) -When a physical quantity is conserved it means that it doesn’t change.

  94. Science: Chemistry

    Can the Law of Conservation of Mass be applied to a chemical reaction in which a gas is produced? Yes. THe gas has mass.

  95. Science

    How does the principle of conservation of mass relate to chemical reactions? What information does a chemical equation give you?

  96. physics

    The Bernouilli equation is a statement of which physical principle? Select one: a. COnservation of Momentum b. Newton's Second Law c. Pascal's Principle d. Conservation of Energy

  97. Chemistry

    When solving Hess law problems,do we need to use all the equations given to get the Htotal or just choose the relevant equations that are related to the final equation required? Let's say there r 5 equations given,but the relevant equations are 3 only ,so

  98. arkansas history

    How are rights and civic responsibilities similar? A. They apply to all citizens. B. They apply only to people who accept them. C. They apply to both citizens and noncitizens. D. They apply only to people who follow the law.

  99. Science

    What did Antoine Lavoisier’s experiments demonstrate? a- Atoms always split into pairs during a chemical change. b- Mass is neither lost nor gained during a chemical change. c- Matter can be created during a chemical change. d- Energy is neither lost nor

  100. cycles of matter (life science)

    How does the Laws of Conservation of Matter and Energy relate to the Cycles in Nature?

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