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
zepelin [54]
3 years ago
5

If a typical smelt weighs 225 g, what is the total mass of pcbs in a smelt in the great lakes?

Physics
1 answer:
Alex787 [66]3 years ago
8 0

Since a typical smelt has 1.04 ppm of PCB is great lakes. So the amount of PCB in a smelt in great leak can be calculated by multiplying the mass of smelt by the pcbs present in a smelt

225 g * ( 1.04/100000) = 2.34 x10^-4 g pcbs

You might be interested in
Que carro ese que está en la foto
Taya2010 [7]
Travis Scott!3&;8284$28&:!;&29395
7 0
3 years ago
Read 2 more answers
The element selenium (Se) bonds with chlorine (Cl) to make the formula SeCl2 Chlorine is more electronegative than selenium. Wha
Akimi4 [234]

Answer:

Selenium dichloride

Explanation:

Selenium (Se) and Chlorine (Cl) are both elements capable of combining together to form a compound with the chemical formula; SeCl2. Since the chlorine atom is more electronegative than selenium atom, the chlorine pulls more electrons towards itself to form an IONIC bond.

The SeCl2 compound formed is called Selenium dichloride as two atoms of Chlorine are needed to combine with one atom of Selenium to form the compound.

7 0
3 years ago
Which is an example of a covalent bond?
velikii [3]
The correct answer is definitely C. There are less than 16 valence electrons in 2 chlorine atoms, but they form a stable bond because a covalent bond should involve <span>a pair of electrons between atoms in a molecule. I thing it's pretty clear. Regards!</span>
4 0
3 years ago
A sportscar has a mass of 1500 kg and accelerates at 5 meters per second squared. What is the magnitude of the force acting on t
Hatshy [7]

Answer:

7500 Newtons

Explanation:

Mass of the sportscar= 1500 kg

Acceleration of the sportscar= 5m/s^2

Hence, let the Force acting on it be F

We\ know\ that,\\Force=Mass*Acceleration\\F=ma\\\\Here,\\F=1500*5\\=7500 kg m/s^2\ or\ 7500\ Newtons

4 0
3 years ago
A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 27 ∘ above t
ycow [4]

Answer:

Explanation:

Applied force, F = 18 N

Coefficient of static friction, μs = 0.4

Coefficient of kinetic friction, μs = 0.3

θ = 27°

Let N be the normal reaction of the wall acting on the block and m be the mass of block.

Resolve the components of force F.

As the block is in the horizontal equilibrium, so

F Cos 27° = N

N = 18 Cos 27° = 16.04 N

As the block does not slide so it means that the syatic friction force acting on the block balances the downwards forces acting on the block .

The force of static friction is μs x N = 0.4 x 16.04 = 6.42 N   .... (1)

The vertically downward force acting on the block is mg - F Sin 27°

                                                      = mg - 18 Sin 27° = mg - 8.172    ... (2)

Now by equating the forces from equation (1) and (2), we get

mg - 8.172 = 6.42

mg = 14.592

m x 9.8 = 14.592

m = 1.49 kg

Thus, the mass of block is 1.5 kg.  

6 0
3 years ago
Other questions:
  • What does the octect rule state that explains why atoms bond ?
    9·1 answer
  • Which of the following is the most effective relaxation technique?
    11·2 answers
  • How is a habitat different from an ecosystem?
    14·2 answers
  • I’m just completely confused
    15·1 answer
  • Two power lines run parallel for a distance of 220 m and are separated by a distance of 40.0 cm. If the current in each of the t
    6·1 answer
  • If you rub a balloon on a piece of fabric or carpeting and then hold it against your head, your hair can stand on end. Why does
    14·1 answer
  • A small, 3 kg weight is moved from 5 m from the ground to 8 m. What is the change in potential energy?
    8·1 answer
  • Alarge plate is fabricated from a steel alloy that has a plane strain fracture toughness of 82.4 MPa m1/2. If the plate is expos
    11·1 answer
  • A firework is ignited, and explodes with a flash and a loud bang as it is blown apart. The system consists of: the firework, the
    5·1 answer
  • State coulomb's law mathematically
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!