The DNA molecule has the shape of a double helix. The radius of each helix is about 10 angstroms (1 Å= 10-8 cm). Each helix rises about 34 A during each complete turn, and there are about 2.9 x 108 complete turns. Estimate the length (in Å) of each helix. (Round your decimal part to two decimal places.) x 1010 A Need Help? Which

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A: cm3 and m3 is unit of measurement. 1 m = 100 cm or 1 cm = 10-2 m

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A:

Q: Osmium has a density of 22.6 g/cm^3. What volume (in cm^3) would be occupied by a 23.7 gram sample…

A: density(d)=M/V  Units gr/cm3 M=mass V=volume

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A: Given, Volume of Magnesium = 10 cm3 Density of Magnesium = 1.7gmL Volume of Zinc = 10 cm3 Density of…

Q: A 1.00 m long beam of stainless steel with a square 2.00 cm X 2.00 cm cross-section has a mass of…

A: Length = 1.00mWidth = 2.0cm = 0.02mBreadth= 2.0cm = 0.02m

Q: The length of a 262 mm line can also be expressed as: (choose one of the choices) Hint: you must…

A: Given 262 mm  Check each unit one by one in options.

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Q: A chemist makes 300. mL of potassium dichromate (K,Cr,0,) working solution by adding distilled water…

A: Answer:- This question is answered by using the simple concept of dilution of concentrated solution.…

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Q: A chemist prepares a solution of mercury(1) chloride (Hg,Cl,) by measuring out 0.939 mg of…

A: Molarity or molar concentration is defined as the number of moles of solute per liter of solution…

Q: A chemist prepares a solution of sodium hyposulfate (Na₂S₂03) by measuring out 15. µmol of sodium…

A: This question belongs to the solutions. We need to find the concentration of the solution mentioned…

Q: 5. Calculate the density of a coin that has a mass of 11.34 grams, a diameter of 30.61 mm, and a…

A: To solve this problem we have to calculate the density of the coin .

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A: The amount of substance is usually defined in terms of mole. The mole is the SI unit of the quantity…

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Q: N204 (9) + 4 H2 (g) → N2 (g) + 4 H20 (9) Express your answer using one decimal place.

A:

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A: 1 Parsec equals 3.26 light year Speed of light =  186,000 miles per second or Speed of light  =…

Q: Heptane and water do not mix, and heptane has a lower density (0.684 g/mL) than water (1.00 g/mL). A…

A: Heptane and water, two immiscible liquids are taken in a cylinder.

Q: Heptane and water do not mix, and heptane has a lower density (0.684 g/mL) than water (1.00 g/mL). A…

A:

Q: Calculate the slope (m) of the best-fit line using the equation: m=y2-y1/x2-x1. Report the result to…

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Q: At A student completed Part C using a small sheet of aluminum metal (d = 2.70 g/cm³). The sheet had…

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Q: 5. A lab experiment requires 0.5 g of copper wire (d = 8.94 g/mL). The diameter of the wire is…

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Q: The radius of a helium atom is 31 pm. What is the radius in nanometers? (pico = 10-12; nano = 10-9

A: This question can be solved easily via dimensional analysis.

Q: A chemist adds 0.75 L of a 0.0229 g/L mercury(II) iodide (HgI₂) solution to a flask. Calculate the…

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Q: Heptane and water do not mix, and heptane has a lower density (0.684 g/mL) than water (1.00 g/mL). A…

A: Given data is: Density of heptane = 0.684 g/ml Mass of heptane = 35.8g density of water = 1.00g/ml…

Q: The speed of light is 3.00x 108m/s (meters per second). What is the speed of light in miles per hour…

A:

Q: A cubic box is completely filled with 1,000.0 kg of water. What is the length of one side of the…

A: The capacity of the cubic box can be calculated from the weight of liquid (here, water) that fills…

Q: 5. al At what temperature is the temperature in degrees Fahrenheit equal to twice the temperature in…

A: Since you have asked multiple question, we will solve the first one. If you want solution of a…

Q: Heptane and water do not mix, and heptane has a lower density (0.684 g/mL) than water (1.00 g/mL). A…

A: The solubility can be determined by the like dissolve like rule, that is a polar molecule will be…

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Q: 6. Calculate the density in g/mL of 0.56 L of solution weighing 190 grams.

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: Gasoline and water do not mix. Regular grade (87 octane) gasoline has a lower density (0.73 g/mL)…

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Q: A chemist makes 880. mL of mercury(II) iodide (HgI₂) working solution by adding distilled water to…

A: To calculate the concentration of diluted solution , we can use the formula M1V1 = M2V2

Q: The length of a 262 mm line can also be expressed as: (choose one of the choices) Hint: you must…

A:

Q: A chemist prepares a solution of nickel(II) chloride (NiCl₂) by measuring out 2.1 × 10² μmol of…

A: Concentration - It is the amount of solute present in per unit volume of solution  Concentration =…

Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.