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
ycow [4]
2 years ago
8

8.3 miles of sodium chloride in 0.65 of water.

Chemistry
1 answer:
Allisa [31]2 years ago
4 0

Answer:

12.77 M

Explanation:

8.3 moles of NaCl in .65 L of water ?    Looking for M ?

8.3 M / .65 L  =  12.77 M

You might be interested in
Which practice is an unsustainable way of managing resources?
Sergeeva-Olga [200]

Explanation:

Unsustainable way of managing resources means using resources in an unjustifiable manner, using without keeping in the needs for future generations. That is disobeying the principles of sustainability.

For examples release of toxic industrial wastes in rivers and thus, polluting it. Or, Deforestation of land for agricultural or industrial purposes. Thus, reducing the oxygen carrying capacity of Earth.

7 0
3 years ago
A compound or material formed by a chemical reaction is known as the of that reaction.
Daniel [21]

Answer:

as the products of that reaction

Explanation:

8 0
3 years ago
How long does it take electrons to get from the car battery to the starting motor? Assume the current is 137 A and the electrons
WARRIOR [948]

Answer:

t = 55.79 min

Explanation:

First, the problem is asking for calculate the time that it takes electrons from the battery to the motor.

The general formula to calculate time is:

<em>t = d/V (1)</em>

Where:

d: distance or length

V: speed

Now, we don't have data of speed, but we can know an expression of current density in function of the distance which is the following:

<em>J = n*q*V (2)</em>

Where:

q: charge of the particle (1.6x10^-19 C)

n: number of charge carriers per unit of volume

Current density (J) is actually current per Area so:

<em>J = I/A (3)</em>

Replacing (3) in (2) we have:

I/A = nqV

Solving for V:

<em>V = I/Anq (4)</em>

Finally, if we replace this expression in (1) we have:

<em>t = nqAd / I (5)</em>

Now, the value of n, it's not given but it can be calculated because we have mass density, molar mass and avogadro's number, so this value of "n" can be calculated using the following expression:

<em>n = D * Av / MM (6)</em>

Where:

D: mass density (kg/m³)

Av: avogadro number (6.02x10^23 atom/mol)

MM: molar mass (kg/mol)

Putting the data that we know to calculate n we have:

n = 8960 * 6.02x10^23 / 0.0635

n = 8.49x10^28 atom/m³

Now with the value of n, we can finally calculate the time:

<em>t = nqAd / I </em>

A is the area and it should be in m²: 44.6 mm² / 1x10^6 m = 4.46x10^-5 m²

d is the length in meter: 75.7 cm / 100 cm/m = 0.757 m

so replacing these data in (5):

t = 8.49x10^28 * 1.6x10^-19 * 4.46x10^-5 * 0.757 / 137

t = 3,347.63 s

But the answer is in minute so:

t = 3,347.63 / 60

<em>t = 55.79 min</em>

so the electrons takes 56 min aprox. to go from the car battery to the starting motor.

4 0
3 years ago
Which type of fertilization is common with animals that live in the water?
Makovka662 [10]

External fertilization in animals usually occurs in water or in damp areas in a process called spawning.

5 0
2 years ago
Read 2 more answers
Copper has a density of 8.96 g/cm3. If 75.0 g of copper is added to 50.0 mL of water in a graduated cylinder, to what volume rea
Tcecarenko [31]

Answer:

The answer to your question is    Final volume = 58.37 ml

Explanation:

Data

density = 8.96 g/cm³

mass = 75 g

volume of water = 50 ml

Process

1.- Calculate the volume of copper

  Density = mass / volume

Solve for volume

  Volume = mass / density

Substitution

  Volume = 75/8.96

Simplification

  Volume = 8.37cm³    or 8.37 cm³

2.- Calculate the new volume of water in the graduated cylinder

  Final volume = 50 + 8.37

  Final volume = 58.37 ml

3 0
2 years ago
Other questions:
  • What is the initial
    6·1 answer
  • Which of the following is a hypothesis that you could form about how soil
    8·1 answer
  • Which of the following best describes a fission reaction involving lithium? (1 point)
    14·1 answer
  • PLS SOMEONE HELP ME ANSWER THESE QUESTIONS ARE THEY CONDUCTION OR CONVECTION OR RADIATION
    11·1 answer
  • What are the four most important elements on earth?
    12·2 answers
  • FORMATION of IONS
    13·1 answer
  • Which element below has the highest electronegativity? beryllium, carbon, fluorine, nitrogen
    8·2 answers
  • WILL GIVE BRANLIEST!! EASY BUT I WAS TO LAZY TO LEARN!! WILL FOREVER BE GREATFUL!!!
    10·1 answer
  • Each time the boy breathes, he exhales 0.5012 L of gas. How many moles of gas does he exhale?​
    11·1 answer
  • Predict the final temperature of 3.50 kg of water in a calorimeter if the water is at 27.5°C before 0.77 oz of noodles containin
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!