1. maths

    how to measure time with a tin can containing water
  2. Thermochemistry

    A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)
  3. Thermochemistry

    A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)
  4. math

    A cylindrical tin of diameter 9cm and height 224cm is half filled with water.Find the volume of water in the tin.
  5. math

    a closed tin is in the shape of acylinder of diameter 10cm and height 15cm.use the value 3.14 for pie to find a)the total surface area of the tin b)the value of the tin to the nearest naira if tin plate cost 450 per m2
  6. Chemistry Stoichiometry

    1. Tin and oxygen gas are reacted together to form Tin (IV) oxide, a solid. If a piece of tin foil, 8.25cm x 21.5cm x 0.60mm (density = 7.28g/cm3) is exposed to oxygen and all the tin reacts, what is the mass of the oxidized tin foil? (98.4g) I am so
  7. Chemistry

    I am having a hard time solving this problem. The formula given is: T=Tin - (Tin - Tinit.)e(-v/v)t If the initial temperature Tinit is 115 (degrees F), the cold water temperature is 35 (degrees F) (1.7 degrees C), and the volume and volumetric flow rate
  8. Chemstry/(microsoft excel)

    I am having a hard time solving this problem. The formula given is: T=Tin - (Tin - Tinit.)e(-v/v)t If the initial temperature Tinit is 115 (degrees F), the cold water temperature is 35 (degrees F) (1.7 degrees C), and the volume and volumetric flow rate
  9. Physics

    A 250 g piece of tin at 99°C is dropped in 100 g of water at 10°C. If the final temperature of the mixture is 20°C, what is the specific heat of the tin?
  10. Math

    Maddy’s loaf tin has three partitioned areas in which to bake three loaves. The outside of the tin along with the partitions is made of 80 inches of material. The area of the entire loaf tin is 192 in2. What are the possible outer dimensions of the loaf
  11. Algebra

    MLids for tin cans are stamped out of a solid sheet of tin as show how much of the tin is wasted in this process? Given L= 15 w=6
  12. calculus

    Use differentials to estimate the amount of tin in a closed tin can with diameter 6 cm and height 14 cm if the tin is 0.046 cm thick.
  13. Math (Word Problem into formula)

    A chemist is studying the properties of a bronze alloy (mixture) of copper and tin. She begins with 6 kg of an alloy that is one sixth tin. Keeping the amount of copper constant, she adds small amounts of tin to the alloy. Letting x be the total amount of
  14. physics

    Equal 0.400-kg mass of lead and tin at 60 degrees celsius are placed in 1kg of water at 20 degrees celsius. a) what is the equilibrium temperature of the system? b)if an alloy is half lead and half tin by mass, what specific heat would you anticipate for
  15. Chemistry

    A compound of Tin Sulfate is decomposed in the lab to give 1.91g of Tin, 1.03 grams of Sulfur, and 2.06g Oxygen. Determine if this is a compound of Tin(II) Sulfate or Tin(IV) Sulfate.
  16. Physics

    So we did this lab about how we are to measure the half life of the beta decay of indium 116 (the indium 116 is captured by indium 115 and undergoes beta decay to become tin 116. Since the Indium 116 I reused I understand that every time we use it, the
  17. Maths

    A closed tin is in the shape of a cylinder of diameter 10cm and height 15cm. Use the value 3.14 for pier to find A.the total surface area B.the value of the tin to the r=nearest 10naira,if tin plate cost #4500 per m2
  18. maths

    A cylindrical tin 8cm in diameter contains water to a depth of 4cm. if a cylindrical wooden rod 4cm in diameter and 6cm long is placed in the tin it floats exactly half submerged. what is the New depth of water
  19. maths

    A cylindrical tin 8cm in diameter contains water to a depth of 4cm. if a cylindrical wooden rod 4cm in diameter and 6cm long is placed in the tin it floats exactly half submerged. what is the New depth of water
  20. maths

    A cylindrical tin 8cm in diameter contains water to depth of 4cm.If a cylindrical wooden rod 4cm in diameter and 6cm long is placed in the tin or floats exactly half 2.what is the New depth of water
  21. Math

    The Recycling Department of a fast food chain is planning to have a Christmas Tree Making Contest in preparation of the upcoming Holiday Season. Part of the contest mechanics is to collect soft drinks tin cans and build a Christmas Tree out of the tin
  22. Chem

    How do I write a balance chemical equations? solid tin(ii) oxide with aqueous hydrogen fluoride to produce aqueous tin(ii) fluoride and water. SnF2(s)+H2(g)
  23. chemistry

    Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: balance steel can tin electrode power source wire lead (x2) tin (II) chloride solution (3.25 M) timer large beaker Procedure: Take
  24. chemistry

    TO DR.BOB222 hi i have a question. It's regarding a electrolytic cells. This lab has already been posted but i wanted to show you what i have so maybe you can check it for me. question: what is the mass of tin produced? what is the theoretical mass of tin
  25. chemistry

    sorry i didn't post before.. Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: Balance Steel can Tin electrode Power Source Wire lead (x2) tin(II) chloride solution (3.25 M) Timer
  26. chemistry

    Here is the full lab: Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: Balance Steel can Tin electrode Power Source Wire lead (x2) tin(II) chloride solution (3.25 M) Timer Large
  27. Chemistry

    In a similar experiment, a sample of tin metal was dissolved in nitric acid to produce 23.00 mL of solution containing Sn2+. Titration analysis resulted in the calculation that the concentration of Sn2+ in this solution was 0.65 mol/L. b. What mass of tin
  28. chemistry

    hey drbob222 do you think you could help me out with this lab. Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: balance steel can tin electrode power source wire lead (x2) tin (II)
  29. Chemistry

    Which statement is true for the cell as it discharges? Zn | Zn2+(1 .0 M) || Sn2+(1.0 M) | Sn (A) Oxidation occurs at the tin electrode. (B) Electrons will flow from the tin electrode to the zinc electrode. (C) The concentration of Zn2+ will increase. (D)
  30. Chemistry

    1. Tin and oxygen gas are reacted together to form Tin (IV) oxide, a solid. If a piece of tin foil, 8.25cm x 21.5cm x 0.60mm (density = 7.28g/cm3) is exposed to oxygen and all the tin reacts, what is the mass of the oxidized tin foil? (98.4g) 2. From the
  31. Chemistry

    Cadmium and a solution of cadmium(II) nitrate are used with tin and a solution of tin(II) nitrate to construct a galvanic cell. 1) The reaction run initially at standard state with 100-mL samples of each solution is allowed to proceed until 8.0 g of tin
  32. chemistry

    sorry the first one didn't post properly Lab: Electrolytic Cells The purpose of this experiment is to test the method of stoichiometry in cells. Materials: balance steel can tin electrode power source wire lead (x2) tin (II) chloride solution (3.25 M)
  33. chemistry

    Here is the full lab: Lab: Electrolytic Cells Purpose: The purpose of this experiment is to test the method of stoichiometry in cells. Materials: Balance Steel can Tin electrode Power Source Wire lead (x2) tin(II) chloride solution (3.25 M) Timer Large
  34. Chemistry

    Which of the following substances has a ∆H°f equal to zero? I2(g) Tin(s, gray) F2(g) NaCl(s) Tin(s, white) Thank you
  35. chemistry

    what is the molal concentration of tin in a solution of 5.000g of tin dissolved in 95.00 g of copper?
  36. Chemistry

    calculate % tin by weight in tin oxide. SnO2. 78.77%?
  37. Maths

    A closed tin of milk has a diameter of 10 cm and height 16 cm , find the total surface area of the tin {take pie to be 22/7}
  38. Math

    A cylindrical can is made from tin.If it can be contain 1000 m^3 liquid inside it then what is the parameter of design if we are oblige use the minimum amount of tin.
  39. calculas,math

    A cylindrical can is made from tin.If it can be contain liquid inside it then what is the parameter of design if we are oblige use the minimum amount of tin.
  40. Chemistry

    Tooth enamel consist mainly of hydroxyapatite (Ca5(PO4)3(OH). When tine (II) Flouride is added to toothpaste it reacts with the enamel to product a more decay-resistant material fluorapatite (Ca(PO4)3F. The by-products of this reaction are tin (II) oxide
  41. Calculus

    The rate at which water flows into a tank, in gallons per hour, is given by a differentiable, increasing function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t (hours) 0 2 3 7 8 R(t) (gallons per hour)
  42. Business

    Prepare a 600 to 700 word analysis of the relationship between humans and time. Include a description of the historical development of the human ability to conceptualize and measure time. Also, examine why humans have a need to measure time, and describe
  43. Mathes

    The radius of the circular base of the larg tin is 5 cm the height is 10,5 cm .calculate the volume of the large tin of jam .use the formula v=nr2h and use n =3,14
  44. physics

    When a closed tin is heated, the pressure inside it increases. This happens because: The molecules move faster and each molecule strikes the walls of the tin more often.
  45. Physics

    A tin can is filled with water to a depth of 50 cm. A hole 16 cm above the bottom of the can produces a stream of water that is directed at an angle of 35degrees above the horizontal. Find the range of this stream of water. Find the maximum height of this
  46. physics

    A tin can is filled with water to a depth of 30 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 34° above the horizontal. (a) Find the range of this stream of water. (b) Find the maximum height of
  47. Physics

    A tin can is filled with water to a depth of 37 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 32 degrees above the horizontal. Find the range of this stream of water. x=? Find the maximum height of
  48. Science

    A tin can is filled with water to a depth of 37 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 32 degrees above the horizontal. Find the range of this stream of water. x=? Find the maximum height of
  49. Sci: Physics

    A tin can is filled with water to a depth of 37 cm. A hole 11 cm above the bottom of the can produces a stream of water that is directed at an angle of 32 degrees above the horizontal. Find the range of this stream of water. x=? Find the maximum height of
  50. Chemistry

    How do you find the ratio of moles of oxygen to moles of tin? What would be the Empirical formula of tin oxide from the result of ratio? From my calculations I got the moles as: Moles of oxygen = 1.761 x 10^-2 Moles of Tin = 8.944 x 10^-3 Thanks!
  51. Chemistry

    Need to write a balanced chemical equation for the reaction between hydrogen selenide and tin. I know that the hydrogen selenide decomposes producing solid tin selenide and hydrogen gas but how would I balance that in the equation. Any help gratefully
  52. math

    Maureen fills a cylindrical tin with sugar cookies for a gift. She plans to put a ribbon around the tin and then attach a bow onto the ribbon as shown in the illustration. The bow itself will take 15 inches of ribbon. If the diameter of the tin is 9
  53. geometry

    A cylindrical tin can holding 2 gal.has its height equal to the diameter of its base.Another cylindrical tin can with the same capacity has its height equal to twice the diameter of its base. Find the ratio of the amount of tin required for making the two
  54. solid mensuration

    A cylindrical tin can holding 2 gal.has its height equal to the diameter of its base.Another cylindrical tin can with the same capacity has its height equal to twice the diameter of its base. Find the ratio of the amount of tin required for making the two
  55. Math - AP Calculus

    The rate at which water flows into a tank, in gallons per hour, is given by a differentiable, increasing function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t (hours) 0 2 3 7 8 R(t) (gallons per hour)
  56. DIFFERENTIATION

    An open topped taking tin with a volume of 864 cm is to be constructed with a square base and vertical sides. Find the least amount of tin plate required.
  57. world geography

    Exports of tin and silver were the mainstays of the _______ economy for many decades. However, today, as the market for tin has declined, the country has become an exporter of other metallic ores, such as gold.
  58. Chemistry

    35. In a calorimeter, the energy content of a substance is calculated from a measure of the temperature change in a known mass of a. iron b. air c. water d. steel C? 36. A decrease in the reactant concentration, per unit time, in a reaction is a measure of
  59. Physics

    While stationary on a boat you are measuring the time it takes for the coin to leave your hand and hit the water.In order to measure that time you are tuned to the sound of the coin hitting the water. You know that it takes 5.5 seconds for the coin to
  60. Science

    How can a graduated cylinder marked in milliliters be used to measure the volume of a small wooden block? Hurry up and answer this for me!!!!!! put 100ml water into the cylinder, then put the block into the water and measure how many ml are indicated on
  61. chemistry

    if 0.225 mol of tin combined with 0.450 mol sulfur, what is the empirical formula of the tin sulfide product?
  62. MATH

    A tin is a right circular cylinder with a diameter of 6 meters and a height of 10 meters. What is the surface area of this tin, in terms of pi?
  63. Chemistry

    What is the volume of Tin(Sn)? Mass of sample = 2.588g Initial vol. of water = 31 m/L Final vol. of water = 32 m/L
  64. math

    Given a circle A whose diameter is 2 ft.and a rectangular piece of tin B,10ft by 4 ft.Find, correct to the nearest square foot, the tin that will be left after the greatest possible number of circles of the size of A have been cut from B. a. zero b. 1
  65. chemistry

    Tin metal is heated with oxygen gas to yield tin(IV) oxide. Express your answer as a chemical equation. Identify all of the phases in your answer
  66. Science

    I have 59.73 grams of a solid dissolved into water. The total is now 115ML of water. I added the water into a beaker already containing said solid. I did not measure how much water I put into the beaker. 59.73g/115ML=0.51g/ML My question is. Is this the
  67. Chemistry

    A strip of zinc medal weighing 2.00 grams is placed in an aqueous solution containing 150.ml of .750M Tin(II) nitrate. Determine the grams of tin metal that will be precipitated.
  68. Chemistry

    What is the molal concentration,m,of tin in a solution of 5.000grams of tin dissolved 95.000grams of copper
  69. biology

    what can we use to measure exactly 0.55ml of water. and what can we use to measure exactly 85ml of water.
  70. Algebra

    Bronze is an alloy that is made of zinc, tin, and copper in a specified proportion. Suppose an order is placed for 1000 pounds of bronze. The amount of tin in this order of bronze is two times the amount of zinc, and the amount of copper is 10 pounds more
  71. chemistry

    Name each of the following ionic compounds or binary molecules. a. SF2---Sulfur difluoride b. MgF2---Magnesium fluoride c. SnCl2----Tin (II) Chloride d. PF5-----Phosphorus Pentafluoride e. NO2-----Nitrogen Dioxide f. SnO2-----Tin (II) Oxide
  72. Geology and soils

    An oven tin containing a sample of moist soil was weighed and had a mass of 37.82 g; the empty tin had a mass of 16.15 g. After drying, the tin and soil were weighed again and had a mass of 34.68 g. Assuming GS = 2.70, determine the void ratio of the soil
  73. Math

    There are two alloys consisting of zinc, copper and tin. The first alloy contains 25% zinc and the second alloy contains 50% copper. The percentage of tin in the first alloy is twice that in the second alloy. 200 kg of the first alloy and 300 kg of the
  74. algebra

    A pound of tin is worth $2 more than a pound of copper. Three pounds of tin are mixed with 7 pounds of copper to make bronze that sells for $3.85 per pound. How much is a pound of tin worth
  75. math

    The interior of a typical mesung cup is a right circular cylinder of radius 6 cm. The volume of water we put in the cup is therefore a function of the level h to which the cup is filled. How closely do we have to measure h to measure out one liter of water
  76. text structure

    People have used various methods to measure the depth of the ocean. Long ago sailors lowered a rope over the side of the ship. When the rope touched the bottom,they knew how deep the water was. Today scientists measure the depth of the water with an echo
  77. ela

    Check the grammar and spelling Our project will make more heat than other projects because we have tin foil that reflect the heat and the shiny side of the tin foil keeps it warmer. We have a very soft blanket that will keep the water warm because its very
  78. Chemistry

    In chemistry lab we did an experiment trying to find the empirical formula of an oxide and tin. The question is "suppose some of the oxide splattered out of the crucible. How would this affect your calculated ratio of the number of moles of oxygen to the
  79. math

    it is required to make an open box of gregreatest possible volume from a square piece of tin,whose side is one metre' by cutting equal squares out of the corners and then folding up the tin to form the sides, what should be the length of a side of the
  80. 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
  81. Chemistry

    Tin and purple Iodine combine to form an orange solid tin iodide compound. If the compound contains 0.00383 moles of Sn and 0.01534 moles of I, what is its' empirical formula?
  82. math

    Bronze cocnsists of 6 parts tin to 19 parts cooper. How amny pounds of tin are there in a 500 lb. bronze statue? What is the formula for getting the answer?
  83. Science

    How do you measure body volume? I need two ways. Thanks. Displacement is a common method. Fill a barrel full of water, then dunk the body (letting the water overflow), remove the body, and then measure the water level. Another method is to use air
  84. Calculus Please Check my answer

    The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t---------0-----2------3-------7----8 (hours)
  85. math

    THESE TINS ARE MATHEMATICALLY SIMILAR. ONE HOLDS 400ml AND THE OTHER HOLDS 800ml. THE HEIGHT OF THE SMALLER TIN IS 8cm. CALCULATE THE HEIGHT OF THE LARGER TIN. GIVE YOUR ANSWER TO TH NEAREST MILLIMETRE.
  86. Math

    In triangle ABC, the measure of C is twice the measure of A, and the measure of B is 6 times the measure of A. Find the measure of each angle
  87. Algebra

    An open box is to be constructed from a rectangular sheet of tin 3 meters wide by cutting out a 1-meter square from each corner and folding up the sides. The volume of the box is to be 2 cubic meters. What is the length of the tin rectangle?
  88. algebra

    An open box is to be constructed from a rectangular sheet of tin 5 meters wide by cutting 1 square meter from each corner and folding up the sides. The volume of the box is to be 18 cubic meters. What is the length of the tin rectangle?
  89. Chemistry

    I need someone to check these True or False questions for me please: 3. Dissolving salt in water is a physical change- F 14. Burning newspaper is a physical change- F 19. The liter is a measure of volume- T 20. The amount of heat and temperature of a
  90. maths

    A heavy 9cm diameter ball is placed in an empty cylindrical tin of diameter 12cm. Enough water is poured into the can to cover the ball.if the ball is then removed , how far does the water level fall
  91. maths

    A heavy 9cm diameter ball is placed in an empty cylindrical tin of diameter 12cm. Enough water is poured into the can to cover the ball.if the ball is then removed , how far does the water level fall
  92. Chemistry

    You add 7.326g of solid CaCl2 to 45.5 mL of water in a coffee cup calorimeter and measure as the temp. Increase from 22.6 C to 41.5 C. Specific heat water is 4.184 J/ g.C and the density of water is 0.9977 g/mL. Find the mass of water. PLEASE HELP ME!!!
  93. Physics

    Geologists place tiltmeters on the sides of volcanoes to measure the displacement of the surface as magma moves inside the volcano. Although most tiltmeters today are electronic, the traditional tiltmeter, used for decades, consisted of two or more
  94. math

    A cone-shaped glass and a tin can are filled with water. The height of the cone is 12" (12 inches) and it has a radius of 1.5" (1½ inches). The can is 2 inches high and has a diameter of 4 inches. Which container holds more water? How much more water does
  95. Chemistry

    What is the ( m/m) % concentration of a tin in a solution of 5.000 grams of tin dissolved in 95.000 grams of copper
  96. Calc Physics

    Geologists place tiltmeters on the sides of volcanoes to measure the displacement of the surface as magma moves inside the volcano. Although most tiltmeters today are electronic, the traditional tiltmeter, used for decades, consisted of two or more
  97. CNHS

    A manufacturer of open tin boxes wishes to use a piece of tin with dimensions 8 in. by 15 in. by cutting equal squares from the four corners and turning up the sides. Find a mathematical model expressing the volume of the box as a function of the length of
  98. HELP ...BODY VOLUME

    Explain how you would measure the volume of your own body. Measure the increase in the water level when the person is totally submeregd in a tank of water. Multiply the water level increase bu the cross sectional area of the tank.
  99. calculus

    right circular cylindrical tin cans are to be manufactured to contain 400 cm ^3 of volume. There is no waste involved in cutting the tin that goes into the vertical sides of the can, but each end piece is to be cut from a square and the corners of the
  100. physics

    Students in lab measure the speed of a steel ball launched horizontally from a table top to be 4.2 m/s. If the table top is 1.2 m above the floor, where should they place a 20 cm tall tin coffee can to catch the ball when it lands?