Homework Answers Page 10667

• What mixtures can be separated by physical means?

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  Chemistry

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• The altitude of a triangle is increasing at a rate of 1.5 cm/min while the area of the triangle is increasing at a rate of 5 square cm/min. At what rate is the base of the triangle changing when the altitude is 9 cm and the area is 81 square cm?

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  Calculus

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• How can I determine the van't Hoff factor of a substance from its formula?

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  Chemistry

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• What is the mass number of an ion with 107 electrons 159 neutrons and a +1 charge?

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  Chemistry

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• How do you find the square root of 576?

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  Algebra

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• What does percent composition mean?

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  Chemistry

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• What is an example of a hyperbole poem by Robert Frost?

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  English

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• How did the split of the Democratic Party affect the outcome of the 1860 election and the Southern states' decision to secede?

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  History

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• What is the difference between residual volume and anatomical dead space volume?

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  Biology

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• What is the ground state electron configuration of calcium ,titanium, rhodium lead, and erbium?

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  Chemistry

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• What is a value of ##x## that makes the relation ##{(2, 4), (3, 6), (8, x)}## a function?

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  Algebra

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• Which one of the following is most reactive? 1.Cl2 2.Br2 3.I2 4.ICl

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  Chemistry

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• What is the color of phenolphthalein indicator in an acidic solution? In a basic solution?

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  Chemistry

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• Why is PbSO4 Insoluble in water?

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  Chemistry

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• What is displacement?

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  Physics

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• A student bought 1 box of crayons and 5 reams of paper for $54. She bought 5 boxes of crayons and 3 reams of paper for $50. What is the cost of each box of crayons and each ream of paper?

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  Algebra

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• Vanillin, a flavoring agent, is made up of carbon, hydrogen, and oxygen atoms. When a sample of vanillin weighting 2.500 g burns in pure oxygen, 5.79 g of ##CO_2## and 1.18 g of water are obtained. How would you calculate the empirical formula of vanillin?

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  Chemistry

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• How does dilution affect the reaction rate?

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  Chemistry

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• How many presidents have died in office?

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  History

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• How do you round 16.527 to the nearest tenths place?

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  Algebra

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• How would you write the formula of the conjugate base of the Bronstead-Lowry acids H2SO3 and HI?

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  Chemistry

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• Is peritonitis fluid around the heart? What causes this?

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  Psychology

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• What is tangential velocity?

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  Science

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• What is the participial phrase in this sentence " The people living in New York deal with snow all winter"?

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  English

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• What is the ground state electron configuration of oxygen?

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  Chemistry

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• A lightyear is the distance light can travel in one year. If the sun is 150,000,000 km away, how many light years is the sun from the earth? Assume that light travels at a speed of ##3.00 * 10^10 cm/s##. Thanks for any help!?

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  Science

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• What are some properties of nascent oxygen?

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  Chemistry

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• What are the two functions of the gallbladder?

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  Psychology

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• Use the formula ##2n^2## How many electrons could energy level five have?

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  Chemistry

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• What was the purpose of the Americanization Movement?

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  History

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• When the angle of elevation of the sun in 64°, a telegraph pale that in tilted at an angle of 12° directly away from the sun casts a shadow 34 feet long on level ground. What is the length of the pole?

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  Geometry

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• What is -0.122 as a fraction in simplest form?

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  Algebra

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• What is the scientific name of our solar system?

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  Science

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• A 1.50 L buffer solution is 0.250 M HF and 0.250 M NaF. What is the pH of the solution after the addition of 0.0500 moles of solid NaOH? Assume no volume change. Ka for HF is 3.5x10^-4

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  Chemistry

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• How many semicolons can you use in a sentence?

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  English

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• How do you calculate limiting reagent and theoretical yield?

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  Chemistry

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• Your local weather report announces that the barometric pressure is 30.44 inHg. Convert this pressure to psi.? Convert a pressure of 23.8 in Hg to kPa

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  Chemistry

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• What are the 5 major arteries in the body?

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  Psychology

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• The formula for the area of a trapezoid is A=1/2h(b1+b2). How do you express b1 in terms of A,h and b2?

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  Algebra

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• How can I balance this chemical equations? Aluminum and hydrochloric acid react to form aluminum chloride and hydrogen gas.

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  Chemistry

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• When will the world end?

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  Science

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• What is unemployment?

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  Economics

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• What are K-selected species?

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  Biology

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• Why is a diffraction grating better than a prism?

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  Physics

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• What is the difference between an isotope and an element?

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  Biology

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• What is a very bright star that is made of an enormous cloud of gas?

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  Science

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• What is 4 square root of 80?

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  Algebra

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• Why does KCN give -CN nucleophile while AgCN gives isocyanide?

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  Chemistry

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• What is the difference between a point estimate and an interval estimate?

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  Statistics

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• What is sublimation in the water cycle and what are examples?

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  Environmental Science

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