a coomon mineral in solid form Quartz, among thousands of choices. Some are more common than others.

32,763 results
  1. Physics

    A ray of light has an angle of incidence of 30.4 degrees on a block of quartz and an angle of refraction of 20.7 degrees. What is the index of refraction for this block of quartz?

  2. Chemistry

    Write and balance equations for the following reactions. A)Iron metal and Chlorine gas react to form solid iron(III) chloride. B)Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. C)Solid magnesium reacts with aqueous

  3. Science

    What is a nonrenewable resource?(1 point) a resource that harms the environment when it is used a resource that is in limited supply a resource that can replace itself quickly a resource that is used for energy Coal is a very useful rock that formed over

  4. Chemistry

    hellppp please i have a test on this on mondayy im so screwed A solid mixture contains MgCl2 and NaCl. When 0.5000 g of this solid is dissolved in enough water to form 1.000 L of solution, the osmotic pressure at 25°C is observed to be 0.4010 atm. What is

  5. Mathmatics plz help

    Jamestown Builders has a development of new homes. There are six different floor plans, seven exterior colors, and an option of either a one-car or a two-car garage. How many choices are there for one home? 84 choices*** 126 choices 15 choices 42 choices

  6. Ela

    THIS IS FOR YOU TO CHECK ANSWERS ONLY!!! 1.Which line from “A Smart Cookie” most helps the reader understand that Esperanza’s mother still has some pride in her own personal abilities? D. No clothes, but I had brains 2. When an author reveals what a

  7. Algebra 1

    Just checking my answers. What is the sum or difference? 1. 2x^4 - 8x^4 A. -6x^8 B. -6x^4*** C. -16x^4 D. -16x^8 What is the sum or difference 2. 10y^10 - 14y^10 A. -4y^20 B. -140y^20 C. -140y^10 D. -4y^10*** 3. Write the polynomial in standard form. Then

  8. science

    Are rocks considered valuable natural resources?(1 point) No, rocks are not valuable because they contain a lot of waste. No, rocks are not valuable because they are nonliving solids. Yes, rocks are valuable because they are useful to people. Yes, rocks

  9. Algebra - help

    A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x2 + 6x + 0.3

  10. Science

    7. Which of the following changes gives no evidence that a chemical reaction has taken place? A cube of solid forms a puddle of liquid. A certain liquid is added to a solid, and bubbles of gas form. Two liquids are mixed, and a precipitate forms. Heating a

  11. science

    What is a nonrenewable resource?(1 point) a resource that harms the environment when it is used a resource that is used for energy a resource that is in limited supply a resource that can replace itself quickly Coal is a very useful rock that formed over

  12. Science

    If you scratch a penny with an steel file, will the copper of the penny rub off on the file, or the steel (iron) of the file rub off on the penny? 12. What can we determine from the above experiment about the relative hardness of copper and steel. 13. What

  13. math

    The number has 6 digits. The nuber is less than 300000. 10 is a factor of the number. The hundred thousands and ten thousands digit are the same and are odd. The tens digit is a cube number and is one more than the thousands digit. The sum of the hundreds

  14. Huryryryyryr

    The mineral ______ can be scratched by Diamond but not by Quartz. It can also be scratched by a drill bit but not by a steel nail.

  15. Chemistry! Please Help!

    Lime (CaO) is used to prevent SO2 from escaping smokestacks of coal burning power plants by the formation of solid CaSO4•2H2O also known as the mineral gypsum. One of the important reactions in the overall process is the dissociation of CaCO3(s). b. If a

  16. science

    What is the relationship between a mineral and a rock? A.They are the exact same thing. B.A mineral is a building block of rocks. C.Minerals are only silicates while rocks are nonsilicates. D.A rock is always man-made while a mineral is naturally

  17. chemistry

    Common ion effect;At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100? Common ion effect;At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100 M CaCl2. Once equ? At some other temperature, a solid sample of

  18. Environmental Science

    #54. In two or three well-developed paragraphs, define and list two characteristics of each of the following: coastal wetlands, coral reefs, and oceans. I'm not sure what it means by defining and listing two characteristics. here's my answer: Coastal

  19. Chemistry

    Write a balanced equation Solid phosphorus (P) combusts with oxygen gas to form solid tetraphosphorus heptaoxide.

  20. Chemistry

    The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 450. g of pure Cu?

  21. math

    This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and

  22. Science

    Which mineral property test is the best way to tell the difference between each type of mineral? Why? Mineral Properties are: -Luster -Color -Magnetism -Hardness -Streak -Cleavage There are other mineral properties like Odor and Taste.

  23. physics

    A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 13.3 kg and 3.56 × 10-3 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of

  24. SCIENCE

    IF YOU DROP DILUTE HYDROCHLORIC ACID ON THE MINERAL ARAGONITE(MINERAL), IT BUBBLES. WHAT MINERAL GROUP DO YOU THINK ARAGONITE(MINERAL) BELONGS TO AND WHY?

  25. Chemistry

    What is an ionic solid? A. One positive ion and one negative ion bonded to form a solid B. Many nonmetal atoms bonded together to form a solid C. Many positive and negative ions bonded to form a solid D. Many metal atoms bonded together to form a solid I

  26. Algebra Question~!

    A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x^2 + 6x + 0.3

  27. MATH HELP!!!!!!! :(

    This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and

  28. Science

    hey, can someone help me im stuck on this one question "The hardness of a mineral is found to be between 9 and 10 on the Mohs scale. Can you accurately state that the mineral's hardness is 9.5? Why or why not? can someone help me please thank you

  29. sience

    A hammer can be used to see how a mineral breaks. If you observe square chunks of the mineral when broken, what can you conclude? (2 points) a The mineral is soft. b The mineral is hard. c The mineral does not have cleavage.

  30. Science, sixth grade

    Which of the following statements best describes the composition of rocks? A. Rocks can only be made up of a combination of three types of mineral. B. Rocks always consist of a single type of mineral. C. Rocks are made up of at least three different types

  31. help needed

    what is mineral's sreak and why is streak more reliable property than color in mineral

  32. Algebra

    A biologist studied the populations of common guppies and Endler’s guppies over a 6-year period. The biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years. common guppies: 3.1x2 + 6x + 0.3

  33. Calculus Infinite Geometric Series

    So this is what Im basically doing, I got how to do Number 1 and 2. This is the way I did it. Im supposed to find the common ration and the sum number. 1. 4 + 2 + 1 + ... The Common ratio is 0.5, so in decimal form it would be 1/2. I sort of get confused

  34. Physics

    The refractive index of a medium changes with the wavelength of incident light. Typically, the shorter the wavelength the larger the refractive index. Fused quartz has a refractive index of 1.47 for indigo light of 400 nm in wavelength, and a refractive

  35. Chemistry

    The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 315 g of pure Cu?

  36. science

    a coomon mineral in solid form Quartz, among thousands of choices. Some are more common than others.

  37. science

    11. A student has four known minerals and one unknown mineral. The student wants to perform a scratch test to find out the hardness of the unknown mineral. The known minerals and their value on the Mohs Hardness Table are: Quartz : 7 Fluorite : 4 Calcite :

  38. Science

    What is a common mineral in solid form? A rock _ _ _ _?

  39. Science

    Someone gives you an unknown mineral. You can scratch it with quartz but not with feldspar. What is the mineral's approximate hardness?

  40. Understanding Paragraphs

    Read each of the following paragraph and underline the topic sentence. Although color is generally the most conspicuous characteristic of a mineral, it is considered a diagnostic property of only a few minerals. Slight impurities in the common mineral

  41. Understanding Paragraphs

    Read each of the following paragraph and underline the topic sentence. Although color is generally the most conspicuous characteristic of a mineral, it is considered a diagnostic property of only a few minerals. Slight impurities in the common mineral

  42. science

    Which of the following is an example of a mineral? A) water B) granite C) coal D) quartz

  43. earth science

    Which of the following is not an example of a mineral crystal shape? A. Pyrite B. Kryptonite C. Quartz D. Calcite i think its A am i right

  44. Earth Science

    can someone help me? you are given a sample of an unknown mineral. you determine that the mineral's streak is whte and its specific gravity is 2.8. is the mineral most likely to be a metallic mineral or a nonmetallic mineral? explain your answer. please

  45. Science

    1. How is luster used for mineral identification? A.It’s the color of the mineral. B.It’s how hard the mineral is. C.It’s how light reflects off the mineral.

  46. science

    quartz is a number 7 on the mohs hardness scale. Apatite is a number 5. a student has a mineral sample that scratches apatite, but quartz scratches the sample. What is the minerals most likely hardness 2 10 6 answer 2

  47. Science

    How is luster used for mineral identification? A.It’s the color of the mineral. B.It’s how hard the mineral is. C.It’s how light reflects off the mineral. D.It’s how a mineral breaks.

  48. Science

    1. How is luster used for mineral identification? A.It’s the color of the mineral. B.It’s how hard the mineral is. C.It’s how light reflects off the mineral. D.It’s how a mineral breaks.

  49. help SCIENCE help

    What is the difference between an atom, compound, and mineral??????? Please help, Thanks Atom= matter in the form of small units Compound= elements chemically combined Mineral= inorganic nutrients that regulate many chemicals in the body for definition of

  50. Math

    I am trying to decide between 2 answers on a vocabulray question. The question is: The ________________ of two or more denominators is the least common denominator. The choices are either simplest form or least common multiple. Would the correct answer be

  51. math

    subtract: express your answer in simplest form. 5x-3/6 - (x+3)/6 answer choices a) 4x-1 b) 2x-3/3 c) 2x/3 -1 d) 2x/3 show me hou to arrive at the correct answer get a common denominator. get a common denominator. I thought 6 was the common denominator, why

  52. Physics

    A gold prospector finds a solid rock that is composed solely of quartz and gold. The mass and volume of the rock are, respectively, 14.8 kg and 1.89 × 10-3 m3. The density of gold is 19 300 kg/m3, and the density of quartz is 2660 kg/m3. Find the mass of

  53. Science

    A student has a mineral sample. He wonders if the sample is the mineral mica. He knows the cleavage pattern of mica is a smooth, flat sheet. The student can best find out the cleavage pattern of the sample by shining a light on the mineral. soaking the

  54. Science

    Beach sand contains plenty of the mineral quartz. Why should you not put your plastic sunglasses down on the sand at the beach?

  55. Science

    In a lab investigation, students had to identify different mineral specimens. Which property is the LEAST reliable for identifying one mineral from another? streak hardness cleavage mineral color

  56. chemistry

    What is an ionic solid? A. One positive ion and one negative ion bonded to form a solid B. Many nonmetal atoms bonded together to form a solid C. Many positive and negative ions bonded to form a solid D. Many metal atoms bonded together to form a solid I

  57. Science

    I have two questions. 1. Describe what would happen if you rubbed a mineral with a Mohrs hardness value of 7 against a mineral with a value of 5? 2. Which mineral identification test would be easy for a person to perform at home. Which would be difficult.

  58. Gen Chem

    Which of the following conditions MUST be true for the entropy of a pure solid to be zero? a) T must be 0 K b) The solid must be crystalline and not amorphous c)the solid must be perfectly ordered d) the solid form must be an element

  59. calculus

    8). Part 1 of 2: In the solid the base is a circle x^2+y^2=16 and the cross-section perpendicular to the y-axis is a square. Set up a definite integral expressing the volume of the solid. Answer choices: integral from -4 to 4 of 4(16-y^2)dy, integral from

  60. physics

    Quartz has a refractive index of 1.54. If light from a HeNe laser impinges on an air/quartz interface at an angle of 22.5 degrees, what is the angle of refraction?

  61. geometry

    A candy company has hired you as their new production manager. Your job is to choose the form of packaging for a new product from the five choices below. The package must hold at least 100 cubic inches. The cost of the cardboard for the packaging is $0.04

  62. Chemistry

    Select all cases in which the attraction between units in the solid can best be classified as electrostatic bonding forces. RbBr H2O2 HI MgI2 Na2O SiO2(quartz) None

  63. Science

    what is the most common mineral?

  64. chemistry

    u was right bob but that makes a change to my other answer for something else my question is: can u tell me of any solid form of a common, neutral substance that only has 3 letters in it 2nd letter is c?

  65. world geogrsphy

    which statement about australia minerals resources is accurate? A)australia contains rich mineral resources B)**australia mineral resources lie deep in the great barrier reef C)australia contains surprisingly few mineral resources D)australia mineral

  66. Physics

    Fused quartz possesses an exceptionally low coefficient of linear expansion, −15.50×10−7 (∘C)−1. Suppose a bar of fused quartz of length 3.23 m at 20.0 ∘C is heated to 227 ∘C. By how much, in millimeters, would the bar expand?

  67. scientist

    Pretend you are a scientist and you just found a solid substance in the ground where you were digging. What types of tests would you do on this substance? How would you determine if it is a rock or a mineral? Describe your substance (yes you can make

  68. ORGANIC CHEMISTRY

    NAME THE PROCESSES OR TECHNIQUES IN THE FOLLOWING. 1.SEPARATION OF A SOLID FROM A SOLUTION 2.WHEN WATER IS COLD TO FORM ICE 3.WHEN WATER IS BOIL TO FORM VAPOR 4.WHEN IODINE IS HEATED DIRECTLY TO FORM GAS WITHOUT BEING LIQUID 5.WHEN STEAM IS COLD TO FORM

  69. Earth Science

    What are the two most common minerals located in Earth's crust? (A. Feldspar and quartz) B. Iron and copper C. Diamonds and gold D. Salt and saline Climatology is a subspecialty of A. environmental science. B. oceanography. (C. meteorology.) D. marine

  70. science

    what is a mineral? noun: solid homogeneous inorganic substances occurring in nature having a definite chemical composition

  71. 5th math

    I need help with my math .What is the least Common Multiple (LCM) for 6,4,and 8.? please! show how you get the answer. cause, i got( 2,2,2) i'm not sure of myself at all. thank you! another one problem i'm really confuse is the Write a 9- digit numeral

  72. Physical Science

    The physical properties of ice are different from the physical properties of dry ice (frozen carbon dioxide). But the physical properties of gaseous water vapor and the physical properties of gaseous carbon dioxide are the same. Why? A.) The valence

  73. geology

    If granite were melted in the laboratory, what would be the order in which its minerals would melt. The minerals inside are: most complete large crystallized mineral is X next complete small cryastallized mineral is Z next to least large crystallized

  74. science

    I'm studying minerals..I understand that if molten rock cools slowly undergound, then large mineral cystals start forming. AND if that rock cools quickly at the surface, small cystals form. My ? is ..sometimes rock has both large and small mineral crystals

  75. Earth's Interior Systems

    which of the following is not a method by which mineral are form

  76. Science

    Fill in the blank A minerals _______ is determined by the ability of one mineral to ________ another mineral

  77. Help with Science

    What are the four charactoristics of a mineral rock? http://en.wikipedia.org/wiki/Mineral

  78. Chemistry

    If 0.8000 g of a mineral yields 0.2400 g of NaCl + KCl, and this mixture contains 58.00% of Cl, what is the percentage of Na2O and K2O in the mineral?

  79. Chemistry Homework

    If 0.8000 g of a mineral yields 0.2400 g of NaCl + KCl, and this mixture contains 58.00% of Cl, what is the percentage of Na2O and K2O in the mineral?

  80. Science

    A minerals _______ is determined by the ability of one mineral to _________ another mineral

  81. chemistry

    Classify each of the follwing by the type of solid(molecular, ionic, metallic, covalent network)it will form: a) Na b) Fe c) SiO2 d) H2O E) KF The result that I got are : a) Na (molecular solid) b) Fe (metalic solid) c) SiO2 (ionic solid) d) H2O (ionoc

  82. Science

    A mineral breaks into flat sheets when struck with a rock hammer. Which property of a mineral is being measured? A. hardness B. cleavage** C. streak D. color

  83. MATHS

    A national math contest consisted of 11 multiple choice questions, each having 11 possible choices, of which only 1 of the choices is correct. Suppose that 111 students actually wrote the exam, and no two students have more than one answer in common. The

  84. math

    what is the standard form and the expanded form 0f 20 and 7 thousands

  85. Math

    Which term can be put in the blank to make the statement below true? 4,000,000=40 A. Thousands B. Ten-Thousands C. Hundred-thousands D. Millions

  86. Science

    If a substance is a mineral, how could you identify what type of mineral it is? help me!!

  87. Science

    Which mineral property is the best way to tell the difference between each type of mineral?

  88. math

    . The ones digit is 0. . The hundreds and tens digits are consecutive numbers. . The digits in the thousands period have a sum of 15, with the hundred thousands digit being the greatest of the threes digits and the ten thousands digit being the least. .

  89. Conestoga

    predict whether a solid will form. Identify the solid and write the balanced equation for the reaction. Na2S(aq)Cu(NO3)2(aq)

  90. english

    i am looking for the main topic in this paragraph would it be In society today more and more people are making the wrong choices to protect their wellbeing and overall health. In society today more and more people are making the wrong choices to protect

  91. Chemistry(Urgent)

    In each of the following case give the name or structure of the compound which fits withe information given. Explain your reasons and write each of the reaction involved 1. R is a liquid which react vigorously with concentrate aqueous ammonia to form a

  92. Chemistry

    The most common source of copper (Cu) is the mineral chalcopyrite (CuFeS2). How many kilograms of chalcopyrite must be mined to obtain 315 of pure ?

  93. chemistry

    The most common source of copper (\rm Cu) is the mineral chalcopyrite (\rm CuFeS_2). How many kilograms of chalcopyrite must be mined to obtain 210.g of pure \rm Cu?

  94. Chemistry

    which method increase the surface of a solid, allowing it to dissolve faster? A)changing the state of the solid B)adding has to the solid C)heading the solid D)reducing the size of the solid

  95. physics

    A ray of light has an angle of incidence of 30.4 degrees on a block of quartz and an angle of refraction of 20.7 degrees. What is the index of refraction for this block of quartz?

  96. physics

    A certain sample of a pure quartz crystal has a mass of 276 grams and a volume 95.8cm^3. -what is the mass density of the sample? -what would be the volume of a larger quartz crystal of the same density if its mass is 1.138 kg? Help please!! Have been

  97. Some Chemistry Questions

    I got three questions. If you were making a tool used to handle live electrical wires, which class of materials would you most likely use? ***Semimetals Metalloids Nonmetals Metals Which of the following changes gives no evidence that a chemical reaction

  98. Science

    How have humans used phosphate minerals as a resource? As fertilizer for crops. To develop new technology.*** People became wealthy from mining. What property does a mineral have if light bounces off of a mineral sample? It is transparent. It is

  99. Science

    How have humans used phosphate minerals as a resource? As fertilizer for crops. To develop new technology.*** People became wealthy from mining. What property does a mineral have if light bounces off of a mineral sample? It is transparent. It is

  100. Math

    How many different three-digit numbers can be written using the digits 4, 5, 6, and 7? Use each digit only once in a number. Is the answer---24 different 3-digit numbers? I did this the long way--Is there a short equation to use for this? Thank you! You

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