Find the number of atoms in a copper rod with a length of 9.20 cm and...

Question

Question

Find the number of atoms in a copper rod with a length of 9.20 cm and a radius of 1.00 cm. The density of copper is 8.96 g/cm3.

Answer 1

Answer #1

Length=9.2cm

Radius=1cm

Density=8.96g/cm^3

Vol of rod=pi× radius×radius×length=3.14×1×1×9.2=28.9cm^3

Mass=density × volume=8.96 × 28.9=259g

Molar mass of copper= 63.55 g/mol

This implies 259g will have 259/63.55 mol =4 mol

We know that 1 mol = 6.022 ×10^23 atoms

Hence 4 mol= 4×6.022 × 10^23 atoms = 2.4088 × 10^24 atoms

Answer 2

Similar Homework Help Questions

Please help! I got this wrong. Please show work too. Thank you! Find the number of...

Please help! I got this wrong. Please show work too. Thank you! Find the number of atoms in a copper rod with a length of 9.90 cm and a radius of 1.00 cm. The density of copper is 8.96 g/cm3 Express the number of atoms to three significant figures or x ion 芻 2.64 1022 Cu atoms Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining
A pure copper cube has an edge length of 1.30 cm . Part A How many...

A pure copper cube has an edge length of 1.30 cm . Part A How many copper atoms does it contain? (volume of a cube = (edge length)3; density of copper = 8.96 g/cm3) N= Cu atoms
A cube of copper metal has a density of 8.96 g/cm3. The cube has a mass...

A cube of copper metal has a density of 8.96 g/cm3. The cube has a mass of 29.54 g. The atomic radius of a copper atom is 1.28 angstroms. How many atoms is the cube of copper metal?

PLZ SHOW ALL WORK THX! You are given a copper rod (shown in pink in the...

PLZ SHOW ALL WORK THX! You are given a copper rod (shown in pink in the figure). Your task is to determine its density. 1 2 3 4 5 6 7 cm a) The rod is situated next to a ruler so that you can measure its length (L). Measure and record the length (L) of the rod. Record this value on your paper with uncertainty. b) The width, height, and mass of the rod are given below. Calculate the...
Electrical AWG 20 copper wire has a cross section diameter of 0.803 mm. Find the linear...

Electrical AWG 20 copper wire has a cross section diameter of 0.803 mm. Find the linear mass density of the wire (the mass per unit of length), the copper volume mass density is 8.96 g/cm3. The linear mass density of the wire, λ = Unit in g/cm What is the mass of a 7‑m segment of AWG 20 wire? The mass of the segment, m = Unit in g A wire spool is marked to have 18 kg of AWG 20...
What is the mass of a gold cylinder that is 6.27 cm long and has a...

What is the mass of a gold cylinder that is 6.27 cm long and has a radius of 3.62 cm? Metal Density (g/cm3) Gold 19.32 Lead 11.34 Aluminum 2.70 Copper 8.96 Silver 10.50 Round your answer to a whole number. Thank you so much

The crystal structure of copper is face-centered cubic (fcc), in which atoms touch along the face...

The crystal structure of copper is face-centered cubic (fcc), in which atoms touch along the face diagonal. Copper has a density of 8.92 g/cm3 . Taking Avogadro's number to be 6.022 x 1023 atoms per mole and the molar mass of copper to be 63.55 g/mol, calculate the atomic radius of a copper atom.
A long, straight copper rod has charge per unit length λ = 0.290 μC/m and a...

A long, straight copper rod has charge per unit length λ = 0.290 μC/m and a diameter of 9.20 cm, what is the electric field at each of the following radial distances from the axis of the rod? (a) 2.30 cm N/C (b) 9.20 cm N/C (c) 2.30 m N/C
A 45.0-cm-long copper wire with radius 0.180 cm and density 8.96 g/cm3 is placed under 47.0...

A 45.0-cm-long copper wire with radius 0.180 cm and density 8.96 g/cm3 is placed under 47.0 N of tension. (a) What is the fundamental frequency of vibration for the wire? Your response differs from the correct answer by more than 10%. Double check your calculations. Hz (b) What are the next two harmonic frequencies for standing waves on this wire? Hz Hz Need Heln?Read it

WO dmensToTIS o1 4.00 cm x 4.00 Cm, calculate the third dimension of the block. 24.)...

WO dmensToTIS o1 4.00 cm x 4.00 Cm, calculate the third dimension of the block. 24.) The density of copper is 8.96 g/cm3. If a cubic sample of copper has a mass of 22 g, calculate the length of one side of the cube. 25.1 The daneihi af nura ai nr in 4nF -4 00 1e