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
Airida [17]
3 years ago
10

Will give brainliest, like, 5 stars and 5 points to best answer

Chemistry
1 answer:
Oliga [24]3 years ago
6 0

evaporation systems allow for an endless source of water. you can grab cups of water straight from the sea or even a lake. the use of evaporation allows for you to drink water thats even healthier than getting it from a cloud and it will leave all of the bad parts that used to be in the water in the first container you pour into. this system is most useful in hot climates such as places near the equator.  

You might be interested in
If the half life of a radioactive isotope is 5000 years, how much of the radioactive isotope in a specimen will be left after 10
marissa [1.9K]
Half life is the time taken by a radioactive isotope to decay by half its original mass. In this case, the halflife of the radioactive isotope is 5000 years. 
Initially the mass is 100 %; thus the mass that will be left will be given by;
New mass = Original mass × (1/2)^n where n is the number of half lives; 
  n = 10000/5000 = 2
New mass = 100% ×(1/2)^2
                 = 100 % × 1/4 
                 = 25%
Therefore; the mass left after 10000 years is 25% or 1/4 of the original mass.
5 0
3 years ago
Electrons involved in bonding between atoms are __________________
Vitek1552 [10]
The name given to these electrons are that they are valence electrons or binding electrons as these are directly involved in chemical Bonding and allow for different compounds to be made.
5 0
3 years ago
Hydrogen sulfide decomposes according to the following reaction: 2H2S(g) ⇋ 2H2(g) + S2(g) Kc=9.30x10-8 at 700.°C.If 0.45 mol of
Natalija [7]

Answer:

[H₂] = 1.61x10⁻³ M

Explanation:

2H₂S(g) ⇋ 2H₂(g) + S₂(g)

Kc = 9.30x10⁻⁸ = \frac{[H_{2}]^2[S_{2}]}{[H_{2}S]^2}

First we <u>calculate the initial concentration</u>:

0.45 molH₂S / 3.0L = 0.15 M

The concentrations at equilibrium would be:

[H₂S] = 0.15 - 2x

[H₂] = 2x

[S₂] = x

We <u>put the data in the Kc expression and solve for x</u>:

\frac{(2x^2) * x}{(0.15-2x)^2}=9.30x10^{-8}

\frac{4x^3}{0.0225-4x^2}=9.30*10^{-8}

We make a simplification because x<<< 0.0225:

\frac{4x^3}{0.0225} =9.30*10^{-8}

x = 8.058x10⁻⁴

[H₂] = 2*x = 1.61x10⁻³ M

5 0
3 years ago
Read 2 more answers
Why is helium heavier than hydrogen​
Kaylis [27]
Helium has more protons making it heavier by one atomic mass.
7 0
3 years ago
Read 2 more answers
What is the function of the two microscope lenses?
mafiozo [28]
The fiction is b because the terms mean subtract
8 0
3 years ago
Read 2 more answers
Other questions:
  • How many grams of sodium hydroxide are needed to make 500mLs of a 0.125M NaOH solution?
    10·1 answer
  • Why are scientific models important in the study of science?
    11·1 answer
  • If one object is hot and another one cold, thermal energy
    15·1 answer
  • Calculate the volume in cm^3 of 325.0 dg of alcohol. Alcohol has a density of 0.785g/mL.
    12·1 answer
  • What is the combined gas law formula ?
    10·2 answers
  • A reaction mechanism has the following elementary step as the slow step: B2A What is the rate law for this elementary step? O ra
    7·1 answer
  • An element X that has 15 protons and 15 electrons, loses three
    12·1 answer
  • Two closed vessels contain chlorine gas at the same conditions of temperature and
    13·1 answer
  • Which of the following describes a use of thermal energy? * A heater warming a room A flashlight shining on a wall A football fl
    5·1 answer
  • resistor has a resistance of 1.8 W. How much current passes through the resistor if there is a potential difference of 3.0 V acr
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!