A modern penny weighs 2.5 g, but is only  2.52 % copper by mass.  Calculate the number of copper atoms in a penny.  Show all of your work using dimensional analysis and report the final answer in the correct number of significant figures.

Q: In 1993 the Minnesota Department of Health set a health risk limit for boron in groundwater of 600.…

A: Given that: mass per liter = 600 μg/L Volume = 94.0 mL To find the mass in micrograms of boron?

Q: The Statue of Liberty in New York City is approximately 305 ft305 ft tall. How many U.S. nickels…

A: By using the general conversion factor that 1mm = 0.00328084feet, the thickness of nickel coin in mm…

Q: Which scale is most useful for reporting data from the spectrometer? Why?

A: The two scales used for analysis in UV spectroscopy is percent transmittance and absorbance.

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: 6. Given your experience in mass determinations (Experiment 1) and with volumetric glassware…

A: There is two common methods mostly used in chemical laboratory are the determination of mass and…

Q: While using an electronic balance the mass of calcium chloride and a watch glass to be 34.920 g…

A: Given  Mass of CaCl2 + watch glass = 34.920 gram  Mass of empty watch glass = 32.17 gram  mass of…

Q: If a cube of table sugar, which is made of sucrose, C12H22O11, is added to concentrated sulfuric…

A: Molar mass of Sucrose (C12H22O11) =12×Molar mass of each carbon atom + 22×molar mass of each…

Q: Use the References to access important values if needed for A sample of volume 244 cm has a mass of…

A: Mass = 1.04 Kg = 1040 g Volume = 244 cm3 Density = ?

Q: The weight percent of silicon in six different rock samples, each containing different amounts of…

A: Solution

Q: Explain in your own words, by writing a short paragraph, how the atomic theory explains…

A: Law of conservation of mass states that atoms are neither created nor destroyed during a chemical…

Q: 2. A chemistry teacher searching for his golf ball in the trees this summer found a magical pool of…

A:

Q: How many pounds of nickel are in 1.2 × 10° of the $1 coins? Give your final answer in the space…

A: we know that in US  1 dollar = 20 nickles

Q: A student obtained the data below after performing a similar experiment described in this…

A: Mass of hydrated salt = mass of crucible, cover and hydrate - mass of crucible and cover. So, Mass…

Q: A cube of an unknown metal measures 1.61 mm on one side. The mass of the cube is 36 mg. Which of the…

A:

Q: Carbon

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

Q: The volume of an irregularly shaped solid can be determined by immersing the solid in a liquid and…

A: Volume of irregularly shaped mineral quartz can be determined by immersing the solid in a liquid and…

Q: A student obtained the data below after performing a similar experiment described in this…

A:

Q: A solid white substance A is heated strongly in the absence of air. It decomposes to form a new…

A: Given: Solid white substances is heated in the absence of ar to produce a new white substance B and…

Q: It is estimated that an adult person contains 6.3 × 103 ppm phosphorus. What mass of phosphorus in…

A: By definition, ppm refers to parts per million.  Therefore, ppm of phosphorus in adult person would…

Q: How many neon atoms are contained in (6.89x10^2) grams of neon? Use at least two decimal places for…

A: Given -> Weight of neon = 6.89 × 102 gram

Q: What is the mass of 4.00 cm^3 of sodium, with a density of 0.97 g/cm^3?

A: MATHEMATICAL TREATMENT OF MEASUREMENT RESULTS Learning Objectives By the end of this section, you…

Q: All of the platinum ever mined = 25 ft3 What is the price of all of the paltinum ever mined?…

A: The conversion of volume of platinum from 25 ft3 into cm3 can be done as,

Q: Student K was asked to determine whether his bar was made of pure palladium.  II) Student S was…

A:

Q: In the picture below, determine how many atoms with a radius of 37pm can fit into a 1.00" box.…

A: Given: The radius of the hydrogen atom is 37 pm. To find: Number of atoms

Q: 2. You can identify a metal by carefully determining its density. A 2.166 g piece of an unknown…

A: Density of a substance is defined as its mass per unit volume.  Mathematically,  Density(d) =…

Q: 3) Na is present in seawater as 1.25 g Na/kg seawater. What volume of seawater as in liters(L),…

A:

Q: Given your experience in mass determinations and volumetric glassware, which factor used in…

A: The density can be determined by using the following formula,

Q: Consider the tabulated data collected by a student for an unknown metal sample. Use this data to…

A:

Q: In an experiment similar to Perrin's, you counted the concentration of suspended particles in a…

A: First we check the relation between depth and number of atoms using the given two observation at two…

Q: The radius of a barium atom is 217 pm. How many barium atoms would have to be laid side by side to…

A:

Q: The distance between two atoms was determined to be 11.4 nm. What is this distance in centimetres?…

A: we know 1 nm = 1.0 * 10-9 m and 1 m = 100 cm => 1 nm = 1.0 * 10-9 m * (100 cm / 1 m) = 1.0 * 10-7…

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: Aluminum (Al) – Lithium (Li) alloys are widely used in the aircraft industry to reduce weight and…

A: According to the question we have, The desirable density is given by ρ = 2.50 g/cm3 and we know…

Q: 26,000 nanoliters = ? dekaliters %3D 26.9 = ? 62 = ? %3D

A: The properties of matter are mainly two types. These are extensive properties and intensive…

Q: Suppose you need 6.5 m of Grade 70 tow chain, which has a diameter of 3/8" and weighs 2.16 kg/m, to…

A:

Q: O CHEMICAL REACTIONS Interconverting number of atoms and mass of compound Calculate the number of…

A: Mass of forsterite (Mg2SiO4) = 80.0 g  Number of magnesium atoms = ?

Q: 1. You are tasked to make an alternative disinfectant for corona virus. Which materials are you…

A: Disinfectant is necessary tool to combat corona virus. In disinfectant some chemicals have to be…

Q: O CHEMICAL REACTIONS Interconverting number of atoms and mass of compound Calculate the mass of…

A:

Q: Determine the volume ton = 2205 Ibs, 1 lb 1 %3D %3D

A: Given mass of Cupper=2.2g Density =8.96g÷cm3 Volume =mass÷density Volume= 2.2÷8.96= 0.24cm3…

Q: Use the simulated data below to calculate the mass/mass percent of casein in your sample of milk.…

A: We need to determine the amount of milk and casein individually followed by their mass/mass percent.

Q: A study of the Earth by The National Aeronautics and Space Administration (NASA) determined there…

A: Given  7.00 x 1011 tons of carbon    Conversion factor:  1 ton = 907.19 kg  1 kg = 1000 g = 103 g…

Q: A method of analysis yields masses of gold that are low by 0.4 mg. This method is used for analysis…

A: The relative error is (mass loss/Total mass )x 100. Based on above detail solution is provided…

Q: 2. The Mercaptan content of household gas supplies is monitored continually to ensure that the gas…

A: As per our guidelines we can only solve first three sub-parts . Please resubmit other questions as…

Q: About two centuries ago, Benjamin Franklin showed that 1teaspoon of oil would cover about 0.5 acre…

A: The volume of the oil (V) = Area (A) x Thickness (T) T = V/A    1 km = 0.6214 mi, so 1 km2 = (0.6214…

Q: The distance between two atoms was determined to be 11.4 nm. What is this distance in centimetres?…

A: Distance is measured in different units. For example nanometre (nm), picometre (pm), centimetre…

Q: What is the mass of phosphorus in a 45 kg person? mass of P = %3D TOOLS x10

A:

Q: The radius of a potassium atom is 231 pm. How many potassium atoms would have to be laid side by…

A: