Homework Answers Page 10683

• What is pH of the solution? 120 mg Na2HPO4 and 100 mg of NaH2PO4 dissolved in 1 L of deionized water.

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  Chemistry

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• How do you write ##sqrt(160)## in simplified radical form?

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  Algebra

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• How do you find the prime factorization of 72?

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  Algebra

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• How do you find the complement and supplement of an angle if the angle is 85 degrees?

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  Geometry

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• Assume for a moment that air consists of 80% nitrogen and 20% oxygen by volume. Using these three figures and typical values for temperature and pressure (1.000atm, 25 degrees C) calculate the density of air?

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  Chemistry

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• Combination reaction when nitrogen combines with hydrogen, ammonia is formed?

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  Chemistry

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• How can density be used to identify substances?

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  Chemistry

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• What is a compound, element, and mixture?

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  Chemistry

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• What is the function of an endocytic vesicle in an Eukaryotic cell?

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  Biology

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• How many biomes are there?

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  Environmental Science

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• Can you define ecology?

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  Biology

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• How do you find x-intercepts, axis of symmetry, maximum or minimum point, and y-intercept for the equation ##y=1/2(x-8)^2+2##?

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  Algebra

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• How do I find the real zeros of a polynomial function on a graphing calculator?

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  Precalculus

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• Is the caffeine molecule polar or non polar?

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  Chemistry

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• Can a plant cell have chloroplasts,leucoplasts and chromoplasts at the same time?

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  Biology

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• How many pounds are in a ton?

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  Algebra

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• What are the reactants in this combustion reaction: ____ —> CO2 + 2H2O?

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  Chemistry

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• Who invented the lightning rod, bifocals, and the catheter?

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  History

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• How do you combine like terms in ##-4+ 7( 1- 3x )##?

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  Algebra

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• What 3-digit number is a perfect square and a perfect cube?

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  Algebra

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• A calcium atom with a mass number of 46. What is the atomic symbol? Express your answer as an isotope.

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  Chemistry

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• How many meters are in 1 kilometer?

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  Algebra

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• What is a hemisphere?

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  Science

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• What were the similarities and differences between the Virginia and New Jersey Plans?

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  History

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• How is an index fossil useful to geologists in establishing the age of the rock layer in which they find it?

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  Science

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• How do you convert 260 degrees to radians?

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  Geometry

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• How does the nucleus relate to its function?

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  Biology

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• why do we get red colour when we burned strontium chloride?

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  Chemistry

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• How does Newton's third law apply to a rifle firing a bullet?

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  Physics

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• How are orbitals related to energy levels?

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  Chemistry

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• Why did the Boxer Rebellion fail?

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  History

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• What is a tissue?

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  Biology

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• Why are organic compounds important?

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  Chemistry

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• How do you use exponents to write 7.5 million in expanded notation?

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  Algebra

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• What's the prefix for 6 when naming molecular compounds?

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  Chemistry

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• The molecular formula of lithium carbonate is Li2CO3. What is the molecular weight of this drug?

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  Chemistry

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• What are some examples of concave mirrors?

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  Physics

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• One pound of bananas costs $0.55. How much would 2.5 pounds cost?

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  Algebra

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• How do you prove ##(sinx+cosx)^2 = 1+2sinxcosx##?

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  Geometry

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• On a road map, the distance from Cleveland to Pittsburgh is 4.5 cm. What is the actual distance between the cities, if the map scale is 1.5 cm is 30 miles?

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  Algebra

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• What is an example Kepler's Third Law practice problem?

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  Physics

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• What is a normal resting heart rate for an 18 year-old, healthy male?

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  Psychology

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• How many sigma and pi bonds does ##"Ca"("CN")_2## contain?

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  Chemistry

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• What is the probability that an individual heterozygous for a cleft chin (Cc) and an individual homozygous for a chin without a cleft (cc) will produce offspring that are homozygous recessive for a chin without a cleft (cc)?

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  Biology

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• Is an ideal gas always measured using STP conditions?

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  Chemistry

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• What are halides? What are some examples of them?

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  Chemistry

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• How do you calculate the ##arcsin (-1/ sqrt 2)##?

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  Geometry

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• What are polyatomic ions containing oxygen atoms called?

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  Chemistry

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• What is ##14 + 18 -:2 * 18 -7##, using order of operations?

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  Algebra

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• Can anyone please tell me the definition of Meiosis?

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  Biology

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