chemistry

If the amount of mercury in a polluted lake is 0.40 ug/mL, what is the total mass of mercury in the lake? (The lake has a surface area of 100 mi squared and an average depth of 25 ft).

  1. 👍 0
  2. 👎 0
  3. 👁 1,951
  1. You're given the area (100 mi^2) and the thickness (25ft). A few things to keep in mind:

    Volume = area * thickness
    1mL = 1 cm^3
    Density = mass/volume

    Thus, you have the volume and the density of mercury in the lake (which is .40 ug/mL). Inconveniently, you were given garbled units for the volume, so you must convert them. I'm going to convert them to cm.

    100mi^2 * (1.6km/mi)^2 * (1000m/km)^2 * (100cm/m)^2 = 25600cm^2

    25ft * 12in/ft * 2.54cm/in = 762 cm

    Now plug them in the equation for volume:

    thickness * area = Volume
    762cm * 25600cm^2 = 19507200cm^3

    You are trying to find the total mass of Hg (mercury) in the lake, so switch the density formula around for mass and plug in the numbers:

    density * volume = mass
    .40 ug/mL * 19507200mL = 7802880ug of mercury.

    1. 👍 1
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    The FDA recommends that women who are pregnant avoid eating more than three 6.00-oz servings of bluefish per month because of the relatively high mercury levels in that type of fish. If bluefish contains 0.341 ppm of mercury (that

    asked by Katie on February 1, 2014
  2. science help pls pls

    Look at the position of Location 1, Location 2, and Location 3 in this picture. Simple diagram of a lake represented by a wavy circle. The circle is labeled 'Lake,' and there are three points outside of the lake: 'Location 1' is

    asked by Oscar on March 22, 2016
  3. Chemistry

    A 76.00-pound flask of mercury costs $151.50. The density of mercury is 13.534 g/cm3. a) Find the price of one cubic inch of mercury by calculating the following intermediate values. What is the price of one pound of mercury?

    asked by Anna on February 10, 2014
  4. Chem

    The amount of energy needed to heat 2.00 g mercury from 50.0°C to 85.0°C is 9.87 J. The specific heat capacity of this sample of mercury is

    asked by glen on March 14, 2013
  5. Chemistry

    The enthalpy of vaporization of mercury is 59.1 kJ/mol. The normal boiling point of mercury is 357*C. What is the vapor pressure of mercury at 25*C?

    asked by Anonymous on October 28, 2010
  1. Chemistry

    If the amount of mercury in a polluted lake is 0.4 µg Hg/mL, what is the total mass in kilograms of mercury in the lake? (The lake has a surface area of 100mi^2 and an average depth of 20 ft.) I'll probably be able to solve this

    asked by Jack on October 12, 2007
  2. Chemistry please help

    Elemental mercury was first discovered when a mercury oxide was decomposed with heat, forming mercury metal and oxygen gas. When a 0.204-g sample of the mercury oxide is heated, 0.189 g of mercury metal remains. a)what is mole

    asked by Adam on February 15, 2012
  3. science

    The toxicity level of a lake is found by dividing the amount of dissolved toxins the lake water currently has per liter by the maximum safe amount of dissolved toxins that the water can hold per liter and then converting it to a

    asked by Anaiah on March 24, 2020
  4. physics

    A glass bottle full of mercury has mass 500g. On being heated through 35 degree census, 12.43 gram of mercury expelled. Calculate the mass of mercury remaining in the bottle (cubic expansivity of mercury is 1.8 * 10 raise to power

    asked by poppy on April 23, 2019
  5. chemistry

    Mercury poisoning is a debilitating disease that is often fatal. In the human body, mercury reacts with essential enzymes leading to irreversible inactivity of these enzymes. If the amount of mercury in a polluted lake is 0.4 mg

    asked by kelly on September 10, 2010

You can view more similar questions or ask a new question.