In water conversation, chemistry spread a thin certain inert materials over the surface of water cut down on the rate of evaporation of water in reservoirs. This technique was pioneered by Benjamin Franklin three centuries ago. Franklin found that 0.10mL of oil could spread the surface of water of about 42.9m2 in area. Assuming that oil forms a monolayer ( that is, a layer that is only one molecules are roughly cubic. (1mm=1*10^-9m)

Q: The distance between the centers of two oxygen atoms in an oxygen molecule is 1.21 x 10- cm What is…

A: The relation between cm and nm is - 1 cm = 1 x 107 nm

Q: The average distance between the Earth and the Moon is 240,000 miles. Express this distance in…

A: The conversion of quantity from one unit to another unit is known as unit conversion. During the…

Q: The safe dosage of the IV antibiotic ceftriaxone for children weighing more than 2.0 kg is 60. mg…

A:

Q: You are to give ampicillin, with a recommended dose of 45 mg/kg, to a child with a mass of 24 kg. If…

A: Given: recommended dose = 45 mg/kg (45 mg per kg of child weight) Mass of child = 24 Kg. Mass of 1…

Q: A chemist tries to dissolve a solid ionic compound called "X" in water at 25°C. He adds 100 mL of…

A: Solution is a homogenous mixture of solute and solvent. Solute is the component present in lesser…

Q: A physics student carried out an experiment to determine the mass – volume relationship in hydrogen…

A: The data given between mass and volume is,

Q: Gold can be hammered into extremely thin sheets calledgold leaf. An architect wants to cover a 100…

A:

Q: In water conservation, chemists spread a thin film of a certain inert material over the surface of…

A: Answer :           Lenght of each oil molecule = 2.38 nm. Given :            Volume of oil = 0.10 mL…

Q: The distance between the centers of two oxygen atoms in an oxygen molecule is 1.21 x 10 cm . What is…

A:

Q: Suppose you are trying to find the volume of a box based on the given measurements for the length,…

A: Here, height is given in two parts as above. Then the addition of two-part values as below…

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

A:

Q: A student dissolved 230.8 grams of cesium chloride in 100.0 grams of 90 °C water.  The student then…

A: 43.8 g of substance has separated out as solid. The mass of cesium chloride present in dissolved…

Q: A sample of an ethanol-water solution has a volume of 54.4 cm^3 and a mass of 49.9 g. What is the…

A: The mass of ethanol is - Mass = density×volume Mass = 0.789×54.4 Mass = 42.9216 gram   Then, total…

Q: A manufacturer of paint claims that a gallon (3.78L) of latex paint can cover 365 ft2 of the surface…

A: A numerical problem based on dimensional analysis, which is to be accomplished.

Q: Carbon

A: Avogadro's  number gives the number of atoms, molecules or ions in one mole of the substance and it…

Q: A solution of 20.91 % by weight H,SO, has a specific gravity of 1.150. What is the normality of this…

A: We have to find normality of solution

Q: A stack of paper has a volume of 187 cube inches Now all the sheets are laid out on the floor,…

A: Given: Volume of a stack of paper = 187 cubic inches Area covered by paper       = 46,750 square…

Q: A watershed has an area of 9.84 x 102 km2 in a region where the annual surface runoff is 305 mm.…

A: Given information: Area of watershed is 9.84 x 102 km2 Annual surface runoff is 305 mm

Q: Chlorine is used to disinfect swimming pools. The accepted concentration for this purpose is 1 ppm…

A: The values are given as follows:

Q: A cement mixer can produce 88.20 pounds of cement mix for 27 minutes. How many hours would it take…

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Q: The volume of seawater on Earth is about 3.3 x 108 mi3. If seawater is 3.5% sodium chloride by mass…

A:

Q: Catalytic converters are used in automobiles to convert harmful gaseous substances in the exhaust to…

A:

Q: Suppose you have Avogadro\'s number of mini marshmallows and use them to cover the state of Wyoming…

A:

Q: 1 liter of paint costs 200.00 pesos can cover 13.33 square meters, exactly how much will it cost to…

A: We need to find total cost of paint.

Q: The average radius of a molecule of lysozyme, an enzyme in tears, is 1430. pm. What is its radius in…

A: Length can be measured in different units such as meter, kilometer, picometer, centimeter, nanometer…

Q: One molecule of the spherically shaped, oxygen-carrying protein in red blood cells, hemoglobin, has…

A: Given: Diameter of the oxygen carrying cells = 5.5nm To Find: Diameter of the cell in meter Formula:…

Q: "If lemons cost $2.49 per pound and Alice makes $32.00 per hour, how many hours must Alice work to…

A: Often while calculating, there is a need to convert units from one system to another system. The…

Q: A student in the laboratory needs a 0.125 M sulfuric acid solution, H SO, What volume in mL. of a…

A: Given M1 ( Molarity of stock ) = 18M V1 (Volume of stock) = ? M2 (Molarity of required solution) =…

Q: A cylindrical glass tube of length 25.75 cm and radius 2 cm is filled with argon gas. The Empty tube…

A: Given: Length is 25.75 cm. Radius is 2 cm. Weight of empty tube is 186.25 g. Weight of tube with Ar…

Q: To identify a metal, an experimenter placed, 4850cg sample in a graduated cylinder. He then poured…

A:

Q: A sample of gold foil is 9.5cm by 12cm. If the mass of the foil is measured to be 10.56g and the…

A:

Q: To aid in the prevention of tooth decay, it is recommended that drinking water contain 0900 ppm…

A: Given  0.900 ppm = 0.900 g/106 cm3 water dimensions of cylindrical water reservoir diameter = 5.29 x…

Q: Consider Ben Franklin used one teaspoon of oil and if one teaspoon = 5.0 cm3and the area covered by…

A: Conversion of acre into m2: Calculation of thickness:

Q: A. A typical cheese contains 30.17% water, 31.23% protein, 34.39% fat by mass and the rest made up…

A: We have to predict the mineral water content, volume occupied.

Q: The speed of light is (2.998e8m/s) How far does light travel in 9.0μs? Set the math up. But don't do…

A: Given,Speed of light = 2.998 × 108 m/sTime = 9.0 μsFirstly, let us convert 9.0 μs to s using…

Q: 1. A hollow square metal tube has a measurement of 2.42 in for each side and a weight of 53.71 g.…

A: Side of square(a) = 2.42 inches Weight of the Tube = 53.71 g Volume of empty space = 0.93 in3…

Q: The solubility of potassium chromate is 65.7 g per 100 g of water. In an experiment , a student had…

A: Given solubility of potassium chromate is 65.7 g per 100 g of water. Given volume of water is 762…

Q: The volume of seawater on Earth is about 330,000,000 mi. If seawater is 3.5% sodium chlo- ride by…

A: We have Volume of sea water =330,000,000 mi3 1 mi=1.609 km 1 ton=907.185 km Density=1.03 g/ mL

Q: 2. Gold can be hammered into extremely thin sheets called gold leaf. A 200-mg piece of gold (density…

A: Given : Mass of golf = 200 mg Density of golf = 19.32 g/cm3  length of sheet = 2.4 ft  And width of…

Q: The Deepwater Horizon oil spill released approx. 35000 barrels of crude oil per day into the Gulf of…

A: The Deepwater Horizon oil spill released approx. 35000 barrels of crude oil per day. An oil barrel…

Q: Four research teams measured the density of a new alloy, and what each team wrote in its team…

A: In this question, we are provided with experiment results by to research teams for the measurements…

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: One student measured 25 cm3 of a 1.06 g / dm3 sodium carbonate solution. Calculate the mass of…

A: Given Volume of sodium carbonate = 25 cm3  Density of sodium carbonate = 1.06 g/dm3

Q: What mass (in kg) of saltwater would fill an olympic-size swimming pool that is 50.0 meters length,…

A:

Q: You have a patient who weighs 95 pounds. The dosage of a drug is 1.5 mg drug per kg of body mass.…

A: First we need to understand which unit convention are used in the question and which we want to use…

Q: Aluminum-Lithium alloys have been developed by aircraft industry to reduce the weight and improve…

A:

Q: To aid in the prevention of tooth decay, it is recommended that drinking water contain 0.900 ppm…

A: Formula used  ppm = (Mass of solute/mass of solution) 106 ppm = parts per million  density of water…

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.