The density of iron is 8 grams per cubic centimeter. The atomic mass of iron is 56 grams per mole and there are Avogadro’s number of atoms in a mole. Calculate the diameter of an iron atom to two significant figures.

Q: Manufacturers of headache remedies routinely claim that their own brands are more potent pain…

A:

Q: A rectangular prism with width of 5.2cm and a length of 7.8cm is made of metal alloy. After you…

A: Weight = Density × volume × g

Q: The active element of a certain laser in made of a glass rod 28 cm long and 2.3 cm in diameter.…

A: Length , L = 28 cm = 0.28 m Diameter , d = 2.3 cm = 0.023 m Average coefficient of linear expansion…

Q: A student collected 38.62 mL of H2 over water at 25.00 ºC. The water level inside the collection…

A: The reaction of Zn with the HCl is produced ZnCl2 and H2 Zn + HCl ------------> ZnCl2 + H2 from 1…

Q: How many hydrogen atoms are present in 722.6 g of sucrose (C12H22011)? (Molar mass of carbon =…

A: Avogadro’s law, a statement that under the same conditions of temperature and pressure, equal…

Q: A Honda Accord gets 24 miles per gallon in the city and is estimated to emit 7 tons of CO2 per year.…

A: Total emission = 7 × 2000 pounds                            =14000 pounds

Q: How many moles of hydrogen molecules are needed to react with one mole of oxygen molecules?

A: Given: Moles of oxygen (no) = 1 mole.

Q: The temperature, at which the root mean square velocity of hydrogen molecules equals their escape…

A:

Q: if a record sample has rate of 44100Hz, how many samples are required to capture 0.25s?

A:

Q: What is the mean free path of molecules in an ideal gas in which the mean collision time is 4.00 ×…

A:

Q: The size of a bacteria is 0.25 micrometer. This size is same as О а. 250 nm O b. 25 nm O c. 2.5 nm O…

A: 1 micrometer = 10-6 m 1 nm = 10-9 m

Q: In the figure below, the actual mass of a piece of an alloy is 85 g (mass in air) and an apparent…

A: mass of an alloy in air (m) = 85 g apparent mass of alloy in water = 73 g

Q: A unit cell of a metal has a volume of 50 cubic angstrom.  If each atom has a volume of 17 cubic…

A:

Q: Suppose that the root-mean-square velocity v-ms of water molecules (molecular mass is equal to 18.0…

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Q: What volume (mL) of the prepared low alcoholic elixir is needed if the prescription requires 120 mL…

A: Volume of high alcoholic elixir = 120 mL * 35% Concentration of high alcoholic

Q: Consider air at P = 1.00 atm. The average molecular mass of air is approximately 29 u (atomic unit).…

A:

Q: The following measurements were taken of stacks of 50 coffee filters. Find the average mass of ONE…

A:

Q: One mole of atoms consists of 6.02 × 1023 individual atoms. If one mole of unicorn atoms were spread…

A: The expression for surface area of Earth is,

Q: A person contains 8.0 L of blood. Blood is composed of 55% plasma and 45% blood cells by volume. The…

A: (a) It is given that blood is composed of 55% of plasma by volume. The volume of plasma in 8L of…

Q: The edge length of a unit cell of a crystal is 4.3 Angstrom and an atomic mass of 90 g/mol. If the…

A: The edge length of a unit cell of a crystal is 4.3 Angstrom and an atomic mass of 90 g/mol. If the…

Q: Suppose a sample of helium gas at 45.0 °C sealed in a flask at a pressure of 5.63 atm was found to…

A:

Q: How many moles of iron is in a 1kg sample of iron?

A: To determine No of moles in 1 kg sample of iron

Q: Calculate the volume of an FCC unit cell in terms of the atomic radius, R.

A: As we know that in FCC unit cell 8 atoms is situated at the 8 corners of FCC unit cell and 6 atoms…

Q: What is a mole? What is energy?

A: We have to define the following. -What is a mole? -What is energy?

Q: A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the output erergy, in kJ…

A: Data provided:  Mass (m) = 75 kg Initial velocity (v0) = 0 m/s Final velocity (vf) = 8.0 m/s Time…

Q: A measuring cylinder contains 50 mL of oil (insoluble in water) with a density of 1.5 g/mL. What is…

A: Given- The volume of the oil =50 mL  and density =1.5 g/mL The new volume of the oil after added…

Q: A cylinder 20cm long and 6cm in radius is made of two different metals bonded end to end to make a…

A: Every body on the Earth has its mass and occupies some volume. The concentration of mass in a given…

Q: A 46.60-gram pycnometer was filled with 100.50 grams of liquid. When filled with insoluble powder,…

A: Mass of pyncrometer, mp=46.60 gMass of liquid, ml=100.50 gMass of insoluble powder+pyncrometer,…

Q: Spherical particles of a protein of density 1.7 g/cm3 are shaken up in a solution of 20°C water. The…

A: It is given that, ρp=1.7 g/cm3=1700 kg/m3T=20oCt=1 hr=3600 sh=7.4 cm=0.074 m

Q: How many molecules of carbon dioxide are there in 44g of carbon dioxide?

A: Number of molecules

Q: Determine the temperature difference (in C°) between the two metals in a thermocouple if the voltage…

A: We have a output voltage generated by a thermocouple V=19 V between metals having temperatures sat…

Q: Manufacturers of headache remedies routinely claim that their own brands are more potent pain…

A:

Q: B. Ann performed a sample analysis for potassium content where the results are the following:…

A: IF the measurements are accurate then, measured values are  very close to the original value. From…

Q: The following data are given for a biogas digester suitable for the output of six cows. The volume…

A:

Q: Why we use a number of antimony-bismuth couple in a thermopile?

A: A thermopile is basically made with an antimony-bismuth couple.When a temperature difference is…

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

A: We know that we have given that  When observing the suspension at a depth of 9 mm from the bottom of…

Q: One mole of atoms consist of 6.02 × 10^23 individual atoms. If one mole of unicorn atoms were spread…

A: It is given that:

Q: . The freezing point depression of a solution of glucose (C,H,206, molar mass = 180.0 g/mol) is…

A:

Q: If the Enthalpy is given as H=exp(T/P), and if T=3165281.11 K, with P=2 E5 Pa, :then Cp is 9/2R 3/2R…

A:

Q: The density of ( Lead ) in “ cgs “ units is ( 11.3 gm/cm^3). The density of same material in the "…

A:

Q: Why do the electron-transfer reactions of the cytochromes differ in standard reduction potential,…

A: The electron-transfer reactions of the cytochromes differ in standard reduction potential, even…

Q: Calculate the time required for molecules to diffuse in a liquid a distance of 10^(−3) cm. Assume…

A:

Q: Three experimental values are obtained for the density of steel in g/cm3, which are: 7.8, 8.1 and…

A: Error in the values of density are - ∆d1=8 g/cm3-7.8 g/cm3=0.2 g/cm3∆d2=8.1 g/cm3-8 g/cm3=0.1…

Q: These are the densities of several materials: 1) Aluminum: 2.70 g/cm3 2) Benzene: 0.879 3) Copper:…

A: Density=massvolume volume of cylinder =πr2h here r=5.7 cm  h=0.79 cm so…

Q: If 10 kg of rock salt is placed in water, it dissolves at a rate proportional to theamount of salt…

A: Let the x be the amount of dissolved salt in the water. The undissolved amount of salt can be…

Q: A certain European automobile has a gas mileage of 12 km/L,  What is the gas mileage in miles per…

A: We know, 1 km = 0.6214 milies (mi) 1 L = 0.2642 gallon (gal)

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.