# Algebra

A sheet of aluminum (Al) foil has a total area of 2.119 ft2 and a mass of 2.714 g. What is the thickness of the foil in millimeters? (Density of Al = 2.699 g/cm3?

1. 👍 0
2. 👎 0
3. 👁 234
1. 2.119ft^2 * 2.699g/cm^3 / 2.714g * (30.48cm/ft)^3 =

2.714g * 2.699g/cm^3 * (30.48cm/ft)^3

thickness = volume/area
= mass/density/area
= (2.714g)/(2.699g/cm^3)/(2.119ft^2) * 1ft/30.48cm = 5.108*10^-4 cm

Seems kind of thin. Better double-check my math

1. 👍 0
2. 👎 0

## Similar Questions

1. ### math

Disks of radius 4 cm are cut from a rectangular plastic sheet of length 84 cm and width 24 cm. How many complete disks can be cut out? Find (a) the total area of the discs out (b) the area of sheet wasted I did it but the answers

asked by Mathew on February 15, 2013
2. ### math

6cm diameter discs are cut from a sheet 130cm long and 70cm wide.(a)How many discs can be cut in this way (b) what area of the sheet is wasted? (My working so far). Area of rectangle=L*B 130*70=9100cm^2 area of circle=22/7

asked by james on April 30, 2015
3. ### Chemistry

A sheet of aluminum foil has a total area of 1.000 ft squared and a mass of 3.636 grams. What is the thickness of the foil in millimeters? (Density of Aluminum is 2.699 grams/cm cubed.)

asked by Paige on September 12, 2008
4. ### Math

The area of the green square is 9 ft2. The area of the yellow square is 25 ft2. What is the area of the red square (labelled "b" in the diagram)? A) 5 ft2 B) 16 ft2 C) 81 ft2 D) 128 ft2 Oh, "ft2" means squared idkk I did the math

1. ### CHEM-last part prob.

Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: 2Al(s) + 3Cl2(g) -> 2AlCl3(s) You are given 19.0g of aluminum and 24.0g of chlorine gas. a)If you had excess chlorine, how many moles of of

asked by K on October 16, 2007
2. ### Chemistry (URGENT)

How many Al atoms thick is the aluminum foil if it is 0.00157cm thick. 1 Al atom = 286pm Convert pm to m 286pm = 2.86*10^-10m Convert m to cm 2.86*10^-10m = 2.9*10^-8cm Divide aluminum thickness and Al atom thickness 1.57*10^-3 /

asked by John on November 24, 2010
3. ### Chemistry

Objectives To determine the molecular weight of a volatile liquid. Discussion [This laboratory exercise was adapted from one in Beran and Brady's Laboratory Manual for General Chemistry , John Wiley & Sons, 1982] The Dumas Method

asked by Veronica on November 27, 2012
4. ### Chemistry

If aluminum has a density of 2.7g/cm^3,what is the mass,in grams of the foil? It states that a package of aluminum foil is 54.3 yd long, 14 inches wide, and 0.00035 inches thick.

asked by TT on September 19, 2010
1. ### math

A triangle has a base of 7 ft. and an altitude of 15 ft. Find its area to the nearest tenth. Choose the best answer from the options below: A 52.5 ft² B 53.5 ft² C 54.5 ft² D 55.5 ft²

asked by makeeda on May 21, 2011
2. ### chemistry need help

How many atoms of aluminum are there in 125 g of aluminum foil?

asked by chrissy on March 25, 2009
3. ### chemistry 105

Sulfuric acid dissolves aluminum metal according to the following reaction: 2Al(s)+3H2SO4(aq)-->Al2(SO4)3(aq)+3H2(g) Suppose you wanted to dissolve an aluminum block with a mass of 14.7 g. What minimum mass of H2SO4(in g) would

asked by julie on October 10, 2011
4. ### AP Physics

Two people are standing on a 2.2-m-long platform, one at each end. The platform floats parallel to the ground on a cushion of air, like a hovercraft. One person throws a 6.0-kg ball to the other, who catches it. The ball travels

asked by Kylie on November 26, 2014