1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
xxMikexx [17]
3 years ago
15

Calculate the concentration imports per million ppm of DDT if a sample size of 5000 g contained 0.10 g DDT

Chemistry
1 answer:
nevsk [136]3 years ago
3 0

Answer:

20ppm

Explanation:

parts per million are defined as the mass of solute in mg (In this case, mass of DDT) per kg of sample.

To solve this question we must find the mass of DDT in mg and the mass of sample in kg:

<em>Mass DDT:</em>

0.10g * (1000mg / 1g) = 100mg

<em>Mass sample:</em>

5000g * (1kg / 1000g) = 5kg

Parts per Million:

100mg / 5kg =

<h3>20ppm</h3>
You might be interested in
The atmosphere is a(n) _____. <br> 1. element <br> 2. compound <br> 3. mixture
tensa zangetsu [6.8K]
The atmosphere is a mixture of gasses.
5 0
3 years ago
Read 2 more answers
A chemist prepares a solution of silver(I) nitrate by measuring out of silver(I) nitrate into a volumetric flask and filling the
leva [86]

Answer:

3.33 M

Explanation:

It seems your question is incomplete, however, that same fragment has been found somewhere else in the web:

" <em>A chemist prepares a solution of silver nitrate (AgNO3) by measuring out 85.g of silver nitrate into a 150.mL volumetric flask and filling the flask to the mark with water.</em>

<em>Calculate the concentration in mol/L of the chemist's silver nitrate solution. Be sure your answer has the correct number of significant digits.</em> "

In this case, first we <u>calculate the moles of AgNO₃</u>, using its molecular weight:

  • 85.0 g AgNO₃ ÷ 169.87 g/mol = 0.500 mol AgNO₃

Then we<u> convert the 150 mL of the volumetric flask into L</u>:

  • 150 / 1000 = 0.150 L

Finally we <u>divide the moles by the volume</u>:

  • 0.500 mol AgNO₃ / 0.150 L = 3.33 M
4 0
3 years ago
Calculate the molarity of hydroxide ion in an aqueous solution that has a poh of 5.00
Simora [160]

Answer:

1.00 x 10^-5 M

Explanation:

pOH=-log[OH^-]

so

[OH^-]=10^(-pOH)

=10^-5

=1.00 x 10^-5 M

4 0
3 years ago
Decreasing the temperature of a reaction decreases the reaction rate because
Elza [17]
The answer u are looking for is b
4 0
3 years ago
Read 2 more answers
Draw the isotopic notation for an element with 15 protons, 18 neutrons and 18 electrons
tatiyna

Answer:

can't be done

Explanation:

protons and electrons always are the same number,and the neutrons are found by subtracting the atomic mass and protons/electrons soooooooo it can't have 15 protons, 18 electrons, and 18 neutrons.......i hope this helped if not please tell me.

5 0
3 years ago
Other questions:
  • What is variable????​
    7·2 answers
  • Please Help!! What is the molality of a solution when 1 mole of NaCl is dissolved in 250 ml of water?
    8·1 answer
  • What elements can be joined by a covalent bond?
    15·1 answer
  • When a solid compound is formed from chemicals which are in solution, it is called a?
    11·2 answers
  • Given the reaction: Ca + 2H2O → Ca(OH)2 + H2 What is the total number of moles of Ca needed to react completely with 4.0 moles o
    15·2 answers
  • How does water move between the hydrosphere and atmosphere?
    7·2 answers
  • A gas expands from 2.5 L to 8.6 L at a constant temperature. If the initial pressure is 1.6 atm, what is the final pressure?
    9·1 answer
  • What does the reproductive system control?
    6·1 answer
  • 14. A cylinder at 48.0 atm pressure and 17.0°C releases 35.0 mL of carbon dioxide gas into a
    11·1 answer
  • the diameter of a hydrogen atom is about 1.05 cross times 10 to the power of negative 10 end exponentmeters. a protein molecule
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!