posted by .

The density of iron is 7.87 . What is the mass of a (variable l)* 4.00cm * 1.00 cm block of iron?

  • Chemistry -

    7.87 WHAT?
    AND you can't have two unknowns. One is mass, the other is l. What is l?

  • Chemistry -

    However, you CAN solve for mass in terms of l.

  • Chemistry -

    7.87 g/ml

  • Chemistry -

    v = length*4*1 = 4*length

    mass = volume x density
    mass = 4*length*7.87 = 31.48*length

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    I have two problems that I'm stumped on. I know the correct anwers but I'm having problems coming up with the co rrect anwsers. Here are the problems: 1) Magnesium has a density of 1.7g/cm^3 and iron has density of 7.9 g/cm^3. A block …
  2. Chemistry

    Average density of a copper-coated iron BB is 8.00g/mL. If the density for copper is 8.92 g/mL, and the density for iron is 7.43g/mL, what is the percentages of copper and iron in a BB?
  3. chemistry

    The density of iron is 7.87 . What is the mass of a l* 4.00cm * 1.00 cm block of iron?
  4. chemistry

    Final temp of a block of iron if 0.87g of water condenses on a 85.0g block of iron that is initially at 20 degrees Celsius.
  5. Chemistry

    Thank you so much for the help on my other question!!! An alloy (solution of metals) is 80% by volume iron. The rest is aluminum. Aluminum has a density of 2.70 g/cm³, and iron's is 7.87 g/cm³. A block of alloy measures 2.0 ft. wide …
  6. Algebra

    The density of iron is 7.87 g/cm3, and the average mass for one iron atom is 9.28×10-23 g. How many atoms are there in a rectangular iron ingot measuring 3.00 cm × 3.00 cm × 9.00 cm?
  7. Chemistry

    Iron ores have different amounts of iron per kilogram of ore. Calculate the mass percent composition of iron for each iron ore: Fe2O3{\rm Fe_2O_3} (hematite), Fe3O4{\rm Fe_3O_4} (magnetite), FeCO3{\rm FeCO_3} (siderite).
  8. chemistry

    a piece of iron measures 10.5cm by 5.25cm by 10.2mm and the density of theiron is 7.86g/cm cubed. what is the mass of the iron?
  9. Physics

    A beaker of mass 5kg containing oil of mass 17.4 kg and density 8.5 x102kg/m3 rests on the scale A block of iron of mass 6.7kg is suspended from the spring scale and completely submerged in the oil as shown in Figure below. Determine …
  10. chemistry

    Answer the following questions about Fe(NO3)3. a. What is the mass percent of iron in this compound?

More Similar Questions