A chemistry student needs  70.0mL  of pentane for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of pentane is  ·0.626gcm−3 . Calculate the mass of pentane the student should weigh out.

Q: The radius of a copper (Cu)atom is roughly 1.3 x 10 10 two separate copper atoms? (Assume there are…

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Q: a researcher is preparing for an experiment that requires 225g phosphoric acid. the only container…

A: We know , Density = mass / volume By using this relation we can calculate the volume of phosphoric…

Q: Classify the following as physical or chemical change: When a solution of concentrated HCl(aq) is…

A: For question 3, we have to find the whether the addition of concentrated HCl(aq) to water is a…

Q: A student wanted to fill a small balloon with 1.00 L of H₂(g) at SATP. The hydrogen gas is produced…

A: we have to calculate mass of aluminum to produce 1.00L hydrogen

Q: The radius of a copper (Cu)atom is roughly 1.3 x 10 10 two separate copper atoms? (Assume there are…

A: Given that: Radius of copper atom=1.3×10−10m

Q: (1) Diamond and graphite are two minerals with identical chemical compositions, pure carbon (C).…

A: 1. Given that, diamond and graphite are two materials with identical chemical compositions and pure…

Q: If one mixes 50 cm3 of EtOH and 50 cm3 of H2O at room temperature; will the total volume of the…

A: Partial molar volume give the answer for this question. Water H2O Ethanol C2H5OH

Q: A website promoting the use of alternative energy vehicles and hybrid technologies claims that, "A…

A: Gallons original quantity = 40 gallons CO2 produced from 40 gallons = 750 lbs. Gasoline primary…

Q: Carry out each of the following calculations, paying special attention to significant figures,…

A: Significant figures are the number of digits in a value, often a measurement, that contribute to the…

Q: The sulfur in an 8-tablet sample of the hypnotic drug captodiamine, C21H29NS2 (359.6 g/mol) was…

A: Given :  Molar mass of captodiamine = 359.6 gm/mol  Mass of BaSO4 recovered = 0.3343 g  molar mass…

Q: the us national institute of standards and technology used mercury gauge as a primary standard for…

A: given, mass of mercury = 225 kilogram = 225000 grams density of mercury = 13.6 g/mL

Q: What is the volume, in L, of a room that is 8.00 ft x 10.00 ft x 10.0 ft?

A: The volume in liters has to be determined. Some of the common conversion factors that will be useful…

Q: What is the mass of a golf ball traveling at 82.0 ms 1? The rest mass of a golf ball is 45.9 g, as…

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Q: A chemist adds 70.0mL of a 2.40 x 10^−4 mol/L copper(II) fluoride (CuF2) solution to a reaction…

A: Given: The volume of copper(II) fluoride (CuF2) solution added = 70.0 mL The molarity of the…

Q: Given the following data, what was the dollar amount of the gold that could have been extracted from…

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Q: It has been estimated that there is 4 x 10^-4 mg of gold per liter of seawater. At a price of…

A: 1 km3 = 1015 cm3. 1 cm3 = 1 milliliters 1 L = 1000 milliliters 1 L = 1000 cm3 1015 cm3 can be…

Q: A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92…

A: Given : Mass of NaCl : 7.7g Weight/Volume = 0.92 To calculate: volume of the saline solution.

Q: What is the difference between a chemical process and a physical process in chemistry

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Q: calculate volume H2=Volume displaced water

A: Given Mass of Empty Beaker is 141.2g, Beaker + Water is 388.3g,  mass of water is 247.1g, volume of…

Q: In heavy water, each of the hydrogen atoms is replaced by a deuterium atom. If the density of…

A: Heavy water is the deuterium oxide, which is another form of water containing heavier isotope of…

Q: The quantitative significance of “take a deep breath" varies, of course, with the individual. When…

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Q: The concentration of carbon monoxide in an urban apartmentis 48 mg>m3. What mass of carbon…

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Q: Ammonium sulfate fertilizer is manufactured by reacting sulfuric acid with ammonia. In the…

A: Sulfuric acid reacts with ammonia to form ammonium sulfate. The equation for the balanced chemical…

Q: The physical fitness of athletes is measured by “VO2 max,”which is the maximum volume of oxygen…

A: Given, VO2 max for an average male = 45 ml VO2 max for a world-class male athlete = 88.0 ml (a) Mass…

Q: The process in which adding a chemical compound to another chemical compound and observe physical…

A: Since we are observing physical changes only. Physical properties reflect quality of a substance.…

Q: Assuming that gasoline is 100% isooctane and that the density of isooctane is 0.792 g/mL, what mass…

A: Given reaction,        C8H18 + 12.5O2  → 8CO2 + 9H2O

Q: One method of manufacturing chlorine gas in a laboratory is to react manganese (IV) oxide with…

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Q: What is the symbol for the quantity defined by this expression: - log [H3O+]

A: This expression tells that the blank is the negative logarithm of the hydronium ion concentration.…

Q: What is the mass of 10.00 ml of wcter at 33oc ?

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Q: What volume 15 grams of water occupies ? (express your answer in cm^ 3

A: Given: Mass of water = 15 g.

Q: You wish to prepare 211 grams of 16.6 % Mg(CH3COO),. . You will need grams of magnesium acetate and…

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Q: How many mL of liquid mercury with a density of 13.6g/mL must you dispense to have 1.56 x 10-3 mol

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Q: what is the mass of calcium carbonate reacted?

A: Given, Mass of marble before reaction 3.0g Mass of marble after reaction 1.8g

Q: A chemist samples a river's water to measure the amount of fertilizer runoff from the area farms. In…

A: PPM and the PPB are units applied in atmospheric chemistry to represent the concentration of the…

Q: Knowing that 1 calorie = 4.184 joules and 1kWh = 3.6 x 106 Joules, convert the following: 2739…

A: Given: 1 calorie = 4.184 joules 1kWh = 3.6 x 106 Joules Toconvert: 2739 teraWh into nanocalories.

Q: What is the mass of a golf ball traveling at 71.8 ms1? The rest mass of a golf ball is 45.9 g, as…

A: 45.9 g is the answer

Q: Give an example of a mixture in which solute is solid and solvent is liquid.

A: NaCl (ionic solid) Water (liquid) Salt water

Q: 1. XY,(aq) + T(s) –– > TX(s) + Y(s)

A: Given: A chemical reaction.  To find : Balanced chemical equation and type of reaction.  Solution :…

Q: Franklin was performing an experiment by combining hydrochloric acid and sodium hydroxide. He…

A: The basis to answer this question is the law of conservation of mass.

Q: Sodium carbonate dissociates when it dissolves in water as follows:   If the concentration of…

A:

Q: The distance from Earth to the Sun is 1.50 x 10 km. What is the distance expressed in gigameters?…

A: Convert Km to Gm ---

Q: Carry out each of the following calculations, paying special attention to significant figures,…

A: Significant figures can be defined as a total number of digits in number including the last digit…

Q: Suppose the metallic paper clips (which contain iron) had been replaced by magnesium or nickel.…

A: Ferromagnetism It is a property of substance in which metals act as a permanent magnets. Also it…

Q: t is recommended that drinking water contain 1.6ppm fluoride (F-) for the prevention of tooth decay.…

A: Given: The diameter of the reservoir, (D) = 4.5×102 m The radius of the reservoir, (r) = 2.25×102 m…

Q: he distance between atoms is sometimes given in pico-meters, where 1 pm is equivalent to 1 × 10^–12…

A: Given : distance between layers in pm = 568 pm

Q: What is the force in newtons acting on a 5.2 kg package of nails that falls off a roof and is on its…

A: Since ,          F= m x a  where F= force          m= mass         a = acceleration

Q: What is the mass of a golf ball traveling at 88.1 ms1? The rest mass of a golf ball is 45.9 g, as…

A:

Q: What is the average flow rate in cm3/s of gasoline to the engine of a car traveling at 100 km/h if…

A: Volume of gasoline consumed in 1 hour = 100 km/h10 km/L =100/10 = 10 L/h Average flow rate of…

Q: A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. When the same flask is…

A: Given Information - mass of empty flask =  78.23 g  mass of flask filled with water = 593.63 g  mass…