1. Chemistry

    How do you calculate the atomic mass of an element when an isotopic composition is given 99.985% 1H; 0.015% 2H Please show steps to solve!

    asked by Jill on October 10, 2007
  2. physics multiple choice MCQ 1- i need help please @all respective sir & bro

    which of the following variable controls the physical properties of a perfect gas? a. pressure b. temperature c. volume d. all of the above e. atomic mass

    asked by hi bro it's me ( ^_^) himel@,Damon ,Steve,Henry. ,Ms.Sue .bobpursley& all respect sir on November 10, 2016
  3. Chemistry

    An ion x3-has 16 neutrons and an electronic configuration of2.8.8 determine 1]th number of protons in an atom x 2]the atomic mass of x

    asked by Edith on December 27, 2016
  4. Physics

    A mass slides down a smooth incline, the normal force is exactly 1/3 the weight of the mass. Find the angle of the incline, relative to the horizontal.

    asked by Tara on May 26, 2015
  5. Physics

    The relative density of an alloy is 6.5.a.find the mass of a solid cube of side 20cm.b.what volume of the alloy has a mass of 13kg

    asked by Anonymous on June 6, 2017
  6. Chemistry

    If I have 1. Mass of test tube and sample 2. mass of test tube 3. mass of sample 4. mass of watch glass and organic solid x 5. mass of watch glass 6. mass of organic solid, x and percent component is calculated as (mass of component/total mass of sample)x

    asked by Vanilla on April 7, 2012
  7. calculus

    A polynomial function p(x) has a relative maximum at (3, -4) a relative minimum at (-1, -6), a relative maximum at (-5, 2) and no other critical points. How many zeros does p(x) have?

    asked by James on March 23, 2013
  8. Organic Chemistry

    Use the data below from an electron impact mass spectrum of a pure compound to deduce its structure. Mass Spectrum M/z Relative intensity 66 32 64 100 49 26 29 72 28 83 27 60

    asked by Anonymous on December 5, 2012
  9. Physics

    A body of mass 20g appears to have a mass of 13g in oil and 12g in water what is the relative density of oil.

    asked by Igbekele on February 26, 2012
  10. science school

    A body of mass 20g appears to have a mass of 13g in oil and 12g in water what is the relative density of oil.

    asked by Anonymous on May 18, 2015
  11. Chemistry please check

    1. A Geiger counter measures radiation indirectly by measuring flashes of light electrons released by ionization speaker static curies answer: electrons released by ionization 2. Reactor control rods are made of a substance that absorbs neutrons reflect

    asked by Mary on February 16, 2008
  12. chem

    What would happen to the specific heat if some of the warm metal shot were lost during the transfer to the calorimeter? Answer a. It would not affect the calculated value of specific heat b. It would cause the calculated value of specific heat to be

    asked by kellie on October 24, 2010
  13. chemistry

    A certain compound contains only vanadium and oxygen. A 35.00 g sample of the compound contains 19.61 g of vanadium. Determine the empirical formula of this compound.

    asked by NONO on October 15, 2011
  14. Chemistry

    Suppose 2 grams of an unknown metal carbonate MCO3 is reacted with excess HCl and 0.88 grams of CO2 are produced. What is the atomic mass (molar mass) of the unknown metal M? What element is it?

    asked by Anonymous on October 7, 2012
  15. Chemistry

    A hypothetical pure element consists entirely of two isotopes. The natural percent abundance of the isotope with mass 25.5 u is 78.8 percent. The other isotope has mass 29.5 u. Calculate the atomic weight of the naturally occurring element.

    asked by Amanda on October 16, 2016
  16. Calculus Help Please!!!

    The circumference of a sphere was measured to be 80 cm with a possible error of 0.5 cm. 1) Use differentials to estimate the maximum error in the calculated volume. (Round your answer to the nearest integer.) 2) What is the relative error? (Round your

    asked by Gul on March 30, 2014
  17. Chem

    What is the ratio of atoms of CL over atoms of Zn? and what is the empirical formula of zinc chloride? In ZnCl2, there are two ions of chloride to each zinc ion.

    asked by Steve on November 30, 2006
  18. Chemistry Basic

    Hello I understand How to do empirical problems, but the way this problem is worded has me so confused. when 1.00g lithium metal is reacted with fluorine gas, the RESULTING COMPOUND has a mass of 3.73g. Calc the emprical fromula of lithium fluoride. I know

    asked by Elizabeth on December 10, 2017
  19. physics

    A mass of 0.7 kg is attached to the end of a massless spring of spring constant 0.35 N/m. It is released from rest from an extended position. After 0.8 s, the speed of the mass is measured to be 1.5 m/s. What is the amplitude of oscillation? What is the

    asked by Katie on March 28, 2012
  20. physics

    A copper wire 81.9 cm long and 1.10 mm in diameter has a mass of 6.43 g. (a) Find the number of electrons in the wire. (Copper has an atomic number of 29; that is, there are 29 protons in the Copper atom. Copper's atomic mass is 63.5.) how many electrons:

    asked by austin on September 19, 2011
  21. physics!

    A copper wire 81.9 cm long and 1.10 mm in diameter has a mass of 6.43 g. (a) Find the number of electrons in the wire. (Copper has an atomic number of 29; that is, there are 29 protons in the Copper atom. Copper's atomic mass is 63.5.) how many electrons:

    asked by austin on September 19, 2011
  22. chemistry

    A hypothetical element has two main isotopes with mass numbers of 71 and 74. If 80.00% of the isotopes have a mass number of 71 amu, what atomic weight should be listed on the periodic table for this element? (answer in AMU).

    asked by theo on August 7, 2017
  23. chemistry

    Butanoic acid consists entirely of C, H and O. Upon combustion, a 0.3164g sample of butanoic acid produces 0.6322g CO2 and 0.2588g H2O. Determine the empirical formula of butanoic acid I don't want the answer just direction on how to solve this pls

    asked by balanciaga on June 11, 2016
  24. ap chem

    could you please check my work? what is the volume of one mole of solid iron at 25 degrees c? 1 mol Fe/.141 mol/cm^3 = 7.10 cm^3 (the .141 came from converting the density in to moles) is that correct? then the next step in the problem is to find the

    asked by John on January 24, 2008
  25. physics (graphs)

    Hi, i'm doing a graph for density of an element as a function of atomic number. i'm trying to calculate the slope and it's asking me to include units. if density as a unit: g/cm^3, how would i write the units of the slope? which is basically density over

    asked by josh on September 26, 2012
  26. chemistry

    mass of crucible- 26.4574g mass of crucible and hydrated sample- 27.7617g mass of hydrated sample 1.3043g mass of crucible and dehydrated sample- 27.5693g mass of dehydrated sample- 1.1119g mass of filter paper- 0.7089g mass of filter paper and copper-

    asked by Johny on February 19, 2013
  27. Algebra

    The formula to compute a person's body mass index is B=703*w/h2 B represents the body mass index, w is the person's weight in pounds and h represents the person's height in inches. I need to: a. solve the formula for w. b. What is the weight to the nearest

    asked by Tyler on October 14, 2009
  28. phisic

    (a) One such reaction fuses two nuclei of carbon-12 (12/6C ) to form an atom of neon (20/10Ne ) with the emission of an α-particle. Write an equation for this process, indicating the atomic number and mass number of each of the products in the usual way.

    asked by john ergent help pleaseeeeeeeeeeeeeeeeeee? on April 20, 2013
  29. Chemistry

    7.77 g of rush (an oxide of iron) is heated until all the O2 atoms combine with charcoal. When this is done, a pellet of pure iron with a mass of 5.44 g remains. What is the empirical forumla for rust?

    asked by Cyn on November 15, 2009
  30. CHEMISTRY

    What mass of sulphur must be burned to produce 64.0 tonnes of sulphur dioxide. . . So far, I have calculated the molecular mass of SO2( 64.1 ) . and then found out the number of moles of sulphur dioxide. ( 998.4) What to do now?

    asked by Clive on July 5, 2016
  31. science help?

    (a) One such reaction fuses two nuclei of carbon-12 ( 6 12C ) to form an atom of neon ( 10 20Ne ) with the emission of an α-particle. Write an equation for this process, indicating the atomic number and mass number of each of the products in the usual

    asked by sam on March 18, 2013
  32. Chemistry

    A student reacted 5.33 grams of cobalt with oxygen gas and obtained 7.50 grams of cobalt oxide. Determine the empirical formula of this cobalt-oxygen compound based upon this experiment.

    asked by Timothy on September 26, 2012
  33. chemistry

    The reaction of zinc and chlorine requires 0.00624 mol of Zn and 0.0125 mol of Cl to react exactly to form zinc chloride. What is the mole ratio of Zn to Cl? What is the empirical formula of zinc chloride?

    asked by Cheryl on February 17, 2010
  34. physics

    If the relative density of a metal is 19. What will be the mass of 20cm of the metal when immersed in water RD=19 Mass=20cm³

    asked by Eniola on May 31, 2015
  35. Chemisty

    Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.

    asked by Greg on April 22, 2016
  36. Chemisty

    Combustion of hydrogen sulphide with oxygen in kmol H2S +O2 = H2O + SO2 can somebody balance this for me and break it down to the atomic mass.

    asked by Greg on April 22, 2016
  37. Chemistry

    A student is given a 5.000g sample to analyze composed of tin metal with a small amount of a zinc impurity. The student dissolves the metal in concentrated nitric acid, allows the reaction to continue to completion, and heats the mixture to leave 6.341g of

    asked by Nicholas on September 18, 2017
  38. Chemistry

    Compound X contains only carbon, hydrogen, nitrogen, and chlorine. When 1.00 g of X is dissolved in water and allowed to react with excess silver nitrate, AgNO3, all the chlorine in X reacts and 1.95 g of solid AgCl is formed. When 1.00 g of X undergoes

    asked by Anonymous on January 6, 2016
  39. physics

    The mass of Earth can be calculated using the fact that the weight of an object (in newtons) is equal to the force of gravity between the object and Earth. Given that the radius of Earth is 6.4*10^6m , determine its mass

    asked by Melissa on April 2, 2012
  40. Physics

    An airplane has a velocity of 580 km/h relative to the moving air. At the same time, a wind blows northward with a speed of 92 km/h relative to earth. The airplane is moving in an easterly direction relative to earth. Find the speed of the airplane to

    asked by Frank on January 24, 2016
  41. Chemistry H.

    Indium has two naturally occurring isotopes and an atomic mass of 114.818 amu. In- 113 has a mass of 112.904 amu and an abundance of 4.3%. What is the identity and percent abundance of indium's other isotope. I am very confused on how do I set up this

    asked by Jennifer on September 23, 2012
  42. Chemistry

    A 1.250 g sample of copper wire was heated in air and reacted with oxygen to give 1.565 g of copper oxide product. Calculate the empirical formula of the copper oxide. Please help I'm lost. I need step by step Please and thank you

    asked by Monique on September 21, 2011
  43. physics

    A canoe of mass 38 kg lies at rest in still water. A man and a woman are at opposite ends of the canoe 4.0 m apart and symmetrically located with respect to the canoe’s centre (which is also its centre of mass). The mass of the man is 65 kg and the

    asked by Anonymous on April 21, 2013
  44. physics

    A canoe of mass 38 kg lies at rest in still water. A man and a woman are at opposite ends of the canoe 4.0 m apart and symmetrically located with respect to the canoe’s centre (which is also its centre of mass). The mass of the man is 65 kg and the

    asked by Anonymous on April 21, 2013
  45. Chemistry

    Many homes in rural America are heated by propane gas, a compound that contains only carbon and hydrogen. Complete combustion of of a sample of propane produced 2.641 grams of carbon dioxide and 1.422 grams of water as the only products. Find the empirical

    asked by Anonymous on August 16, 2010
  46. Chemistry

    I am completely lost in chemistry. Everything the teacher says sounds like a different language to me and I am usually really good in the class. Can someone help me do this problem please? An element "E" is present as 10E (The 10 is like an exponent to the

    asked by Tammy on October 22, 2007
  47. honors chemistry- isotopes...

    can scientists actually measure the mass and relative abundance of isotopes of an element by counting each particle and measuring their masses? [ i think no because it would be too small ] if not, how could a scientist measure the mass and relative

    asked by guitarking4000 on October 31, 2006
  48. physics

    What is the mass of a lead sinker witha volume of 3cm3? please show work I calculated 11.3*3 = 33.9 Is this correct.. Thank you.

    asked by Loui on April 24, 2011
  49. ap chemistry

    what would have happened to your calculated molar mass if some lauric acid was spiled before finding the freezing point?

    asked by de on January 8, 2015
  50. Chemistry

    A metal M forms the sulphate M2(SO4)3 . A 0.596 gram sample of the sulphate reacts with excess BaCl2 to give 1.220 g BaSO4. What is the atomic weight of M? (Atomic weights : S = 32, Ba = 137.3)

    asked by Susan on July 26, 2014
  51. Chem (Help!)

    I really need help answering these questions. A sample of CO2 gas with a mass of 0.30 g is placed in a 250 mL container at 400 K. What is the pressure in atmospheres exerted by this gas? Before you can put the numbers into an equation and solve for the

    asked by Lisa on April 28, 2008
  52. chemistry

    why does atomic size decrease cross a period? why does atomic size increase down a group?

    asked by Anonymous on October 5, 2010
  53. Chemistry

    I have to summarize the development of atomic theory. I think this question is talking about Dalton's atomic theory, is that right

    asked by Sue on November 4, 2008
  54. physics

    A wooden box with a mass of 10.0kg rests on a ramp that is inclined at an angle of 25 degrees to the horizontal. A rope attatched to the box runs parallel to the ramp and then passes over a frictionless pulley. A bucket with a mass of m hangs from the end

    asked by Nicolee on December 4, 2010
  55. math

    Carolyn tested a coin to see if it was evenly weighted. She flipped the coin 100 times and came up with 42 heads and 58 tails. How does the relative frequency of tails to heads compare to the probability of tails in this experiment? A. The relative

    asked by bubbie on June 8, 2013
  56. Chemistry

    If 9.03 x 1021 molecules of a compound having general formula CnH2n+2 weigh 1.71g, what is the molar mass of the compound? Give its molecular formula

    asked by Susan on May 12, 2012
  57. Chemistry

    If 9.03 x 1021 molecules of a compound having general formula CnH2n+2 weigh 1.71g, what is the molar mass of the compound? Give its molecular formula

    asked by Susan on May 10, 2012
  58. chemistry

    A 11.0g sample of compound containing only oxygen and carbon produces 3.0g carbon and 8.0g oxygen. Determine the empirical formula of the compound.

    asked by Anonymous on March 12, 2015
  59. Chemistry

    What is the empirical formula of the oxide in Magnesium Oxide? The number of moles of Mg = 8.026 x 10^-8. The number of moles of O = 1.605 x 10^-7.

    asked by Dora on October 22, 2009
  60. Chemistry

    A 11.0g sample of a compound containing only oxygen and carbon produce 3.0g carbon and 8.0g oxygen. Determine the empirical formula of the compound.

    asked by Sherry on March 8, 2015
  61. Chemistry

    How do you find the empirical formula; A 4.083 sample of a chemical containing only lead, carbon, and hydrogen reacts in combustion reaction. 4.444 g of CO2 and 2.274 g of H2O were formed. Insert subscripts in CHPb. I understand how to find moles, then

    asked by Bunny Jones on September 19, 2017
  62. Stiochiometry

    Equation 2Mg+O2= 2MgO Lab data: Magnesium ribbon= .04 grams Magnesium Oxide= .09 2. Using the initial mass of magnesium, calculate the moles of oxygen and then moles of magnesium oxide produced. What is the mole ratio of the reactants? 3. Calculate the

    asked by Emily on February 26, 2009
  63. chemistry

    1) The color of bromocresol green indicator is??? when pH < 4, green when pH 4- 5.3 and ???? in pH > 5.3. 2)(A) A student performed the freezing point depression experiment according to directions but mistakenly recorded the mass of lauric acid as 8.300 g

    asked by chris on April 5, 2008
  64. Chemistry

    The foul odor of rancid butter is due largely to butyric acid, a compound containing carbon, hydrogen, and oxygen. Combustion analysis of a 4.30-g sample of butyric acid produced 8.59g CO_2 and 3.52 g H_2O.Find the empirical formula for butyric acid.

    asked by Chelsea on September 17, 2010
  65. ecology

    WHICH WEATHER SITUATION WILL BE THE LEAST COMFORTABLE FOR A LONG DISTANCE RUNNER? A.20* CELCIUS (68f) WITH RELATIVE HUMIDITY OF 40% B. 20* CELCIUS (68f) WITH RELATIVE HUMIDITY OF 90% C.25* CELCIUS (77 f) WITH RELATIVE HUMIDITY OF 90% D.35* CELCIUS (95 f)

    asked by JOSHUA on September 6, 2008
  66. Physics

    an astronaut of mass 150 kg is stranded 100 m from the international space station and is at rest relative to it he decides to throw his movie camera of mass 4.5 kg away at a speed of 10 m/s he has 5 minutes of air left in his tank does he make it back in

    asked by Anonymous on November 12, 2014
  67. Chemistry-Bonding

    Classify the following bonds as ionic, covalent, or neither (O, atomic number 8; F, atomic number 9; Na, atomic number 11; Cl, atomic number 17; U, atomic number 92). a.) O with F _________ b.) Ca with Cl __________ c.) Na with Na _________ d.) U with Cl

    asked by Mary on November 13, 2009
  68. chemistry

    The atomic mass of chlorine is listed as 35.454 amu on the periodic table. It has two naturally occurring isotopes, CI-35 and CI-37. What are the approximate percentage of each?

    asked by Sara on September 20, 2012
  69. chemistry

    write half reaction for KMnO4 and (COMM)2 and balance the equation.calculate the atomic mass of M in14.0g/dm3 of solution

    asked by precious on September 21, 2014
  70. Physics

    How many grams of water (H_2O) have the same number of oxygen atoms as 1.0 (mol} of oxygen gas? atomic mass of H is 1 and O is 16, so H2O has a molar mass of 18. Oxygen gas is O2, with a molar mass of 32. So 1.0 mole of oxygen gas has 6.02x10^23 molecules

    asked by ana on November 18, 2009
  71. Science

    What is the total mass when you pour 100 g of vinegar into a flask and add 10 g of baking soda in a flask. Also what is the chemical formula for this. how can we change the formula so the experiment will be accurate. Thanks

    asked by Gayle on December 3, 2014
  72. EARTH SCIENCE

    1. What measurement best describes the results of a scientific experiment regarding volume? A. 1425 mL B. 5 quarts C. 2 pints D. 125 gallons A? 2. How is the mass number calculated for an element? A. The product of neutrons and protons B. There is no

    asked by Beatrice on January 7, 2014
  73. Chemistry (Help)

    Completion (Help) To find the mass of a mole of a compound, scientists add together the __1____ of the atoms making up the compound. When you substitute the unit grams for amu, you obtain the ____2____ of the compound. There are __3____ representative

    asked by Bryan on February 4, 2007
  74. Physical Geography

    Would someone please help me with this? Or at least tell me the formula I should be using? I've been trying to get help with this for four days now. I'm VERY frustrated. Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain.

    asked by Sandra on June 9, 2012
  75. Geog

    Would someone please help me with this? Or at least tell me the formula I should be using? I've been trying to get help with this for four days now. I'm VERY frustrated. Assume that a parcel of air is forced to rise up and over a 6000-foot-high mountain.

    asked by Tony on July 9, 2015
  76. Algebra

    If a researcher wanted to know the mean weight (the mean is the sum of all the measurements divided by the number of measurements) of women in the U.S., the weight of every woman would have to be measured and then the mean weight calculated, an impossible

    asked by Kim on September 29, 2014
  77. Physics

    Explain why the mass of the vehicle does not affect the calculated maximum or minimum velocities for cars on banked curves.

    asked by Talulah on February 23, 2009
  78. chemistry

    Identify the quantity that is calculated y dividing the molar mass of an element by Avogadro's number. I don't get this question..?

    asked by Astrid on March 10, 2010
  79. Extrema-Check my work please?

    Find and classify the relative maxima and minima of f(x) if f(x)= defint a=0 b=x function= t^2-4/(1+cos(x)^2) dt x^2-4/(1+cos(x)^2)= 0 x^2-4=0 x^2=4 x= +/- 2 So I got relative maximum as -2 and 2. And relative minimum as zero. However, when I graph it on

    asked by Eric on May 17, 2013
  80. basic chem

    1)an atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom? 2)The atomic number of fluorine is 9. What is the mass # of a fluorine atom with 8 neutrons?

    asked by Davis on August 28, 2011
  81. Chemistry

    Compound X contains only carbon, hydrogen, nitrogen, and chlorine. When 1.00 g of X is dissolved in water and allowed to react with excess silver nitrate, AgNO3, all the chlorine in X reacts and 1.95 g of solid AgCl is formed. When 1.00 g of X undergoes

    asked by Sarah on January 6, 2016
  82. physics

    An airplane has a velocity relative to the air of 192 m/s in the westerly direction. If the wind has a speed relative to the ground of 59 m/s directed to the north, what is the speed of the plane relative to the ground?

    asked by A on September 19, 2011
  83. physics

    An airplane has a velocity relative to the air of 181 m/s in a westerly direction. If the wind has a speed relative to the ground of 53 m/s directed to the north, what is the speed of the plane relative to the ground?

    asked by Anonymous on February 11, 2011
  84. Chemistry

    After 0.6523 g of CoCl2*6H2O is heated, the residue has a mass of 0.3423 g. Calculate the % H20 in the hydrate. What is the formula of the hydrate? -I understand how to get the % H2O in the experiment but how do you determine the formula?

    asked by Deana on October 12, 2008
  85. Physics

    An airplane flies due north at 240 km/h relative to the air. There is a wind blowing at 60 km/h to the northeast relative to the ground. What are the plane's speed and direction relative to the ground? Answers to Find: km/h = ? ° east of north = ?

    asked by Physics Help on November 13, 2018
  86. physics

    So I'm doing a lab about simple harmonic information and I have to answer questions at the end of a lab were I'm provided this question to answer here's a step that's not the actual question but the question makes reference to it step 3 Using the pointer

    asked by Kelly on June 1, 2009
  87. Physics

    So I'm doing a lab about simple harmonic information and I have to answer questions at the end of a lab were I'm provided this question to answer here's a step that's not the actual question but the question makes reference to it step 3 Using the pointer

    asked by Kelly on June 1, 2009
  88. Chemistry

    Assume that some of the magnesium nitride is not completely converted to magnesium hydroxide and subsequently to magnesium oxide. Will your empirical formula be too high in magnesium or too high in oxygen? Please show any calculations you used to determine

    asked by GC on February 14, 2014
  89. Geometry

    What formula should be used to derive the equation of a parabola given its focus and directrix? • The distance formula ?? • The midpoint formula • y = ax2 + bx + c • The area formula for a circle

    asked by Sandra on May 20, 2015
  90. Physics

    an airplane has a velocity of 499 km/h relative to the moving air. at the same time, a wind blows northward with a speed of 87 km/h relative to the earth. the airplane is moving in an easterly direction relative to the earth. find speed of airplane to

    asked by S on January 28, 2016
  91. Chemistry

    Determine the empirical formula of magnesium oxide. Weight of magnesium, 0.16g, weight of magnesium, 0.24. Please use 24.31g/mol for Mg and 16.00g/mol for O

    asked by Rayman on November 17, 2013
  92. Chemistry

    Determine the empirical formula of magnesium oxide. Weight of magnesium, 0.16g, weight of magnesium, 0.24. Please use 24.31g/mol for Mg and 16.00g/mol for O

    asked by Rayman on November 17, 2013
  93. algebra

    how would i work out the following problems solve each formula in terms of the given variable 1. 5d-2g=9 ;g The formula A=2h(l+w) gives the lateral area a of a rectangular solids with length l, width,w and height h. 2. solve this formula for h 3. solve

    asked by jessica on September 22, 2008
  94. math

    Interest is calculated with the following formula I=Prt What is the future value ( present value + interrst ) of this account? Present value is $600; interest is 6% Term is 12 years ( Enter your answer as dollars and cents. )

    asked by brandon on November 10, 2011
  95. Math

    How long one can hold their breath can be calculated using the formula y=1.4g where y is the amount of time one can hold their breath in seconds and g is the size of their lungs in cubic centimeters. Is this a relation or a function? Explain why. Please

    asked by ~{HAPPY FACE!!}~ on February 12, 2009
  96. Math

    How long one can hold their breath can be calculated using the formula y=1.4g where y is the amount of time one can hold their breath in seconds and g is the size of their lungs in cubic centimeters. Is this a relation or a function? Explain why. Please

    asked by Happy Face! on February 12, 2009
  97. chemistry

    Fumaric acid, which occurs in many plants, contains, by mass, 41.4% carbon, 3.47% hydrogen, and 55.1% oxygen. A 0.050-mol sample of this compound weighs 5.80 g. The molecular formula of this compound is can you show me the formula

    asked by Tierney on October 6, 2009
  98. Physics

    PLEASE SOMEONE HELP ME WITH THIS DARN QUIZ. I'm so lost and all my teachers are too 'BUSY' to help me. :/ I'm getting so sick and tired of studying and not getting it but then having to take the blame for my instructor's folly. 2. Which of the following is

    asked by Debbie on October 17, 2012
  99. Chemistry

    2- Gases A2 and B2 react according to the equation: A2 + B2 → AxBy . If equimolar ( not necessarily stoichiometrically equivalent) quantities are placed in a reaction vessel with a massless, frictionless piston and allowed to react to completion. The

    asked by Ian on April 2, 2016
  100. physics

    An example of the neutron absorption reaction is . 1 0 n+10 5 B-->7 3 Li+ 4 2 He The rest masses of each particle in atomic mass units (u) are 1 0 n= 1 u 10 5 B=10 u 7 3 Li =7 u 4 2 He= 4 u where 1u=1.66x10^-27 kg. calculate Q Q= in MeV I have the same

    asked by Amy on May 8, 2013

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