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
Mekhanik [1.2K]
3 years ago
8

Are all scientific theories perfect?

Chemistry
2 answers:
dlinn [17]3 years ago
7 0

Answer:

No

Explanation:

If new information is proven, then a theory can change. However this is not likely to happen.

earnstyle [38]3 years ago
6 0
No I don’t think it is
You might be interested in
14
Scrat [10]

Answer:

The correct answer is <em>D) Niels Bohr​</em>

Explanation:

Bohr proposed a new atomic model, whereby he explains that electrons rotate around the nucleus at well-defined levels, describing circular orbits. Each orbit was called the energy level (it is called the main quantum number n, going from numbers 1 to 7). To make his model, Bohr studied the Hydrogen atom (it has a proton in its nucleus and an electron rotating around it).

5 0
4 years ago
Why is a complete atom electrically neutral?
IrinaK [193]
Because it is balanced with protons and electrons
8 0
3 years ago
1. A solution has a volume of 2500 mL. How<br>many liters is this?<br>​
pentagon [3]

The volume of the given solution is 2.5 L.

<u>Explanation:</u>

Volume of the solution = 2500 mL

We have to convert it into litres as,

1000 mL = 1 litre

To convert ml into litres we have to divide the millilitres by 1000, so that it can be converted into L.

Here given volume is 2500 mL.

Volume in L = $\frac{2500}{1000}  

                   = 2.5 L

So the volume of the solution is 2.5 L.

4 0
3 years ago
Carbon dioxide gas is collected at 27.0(degrees)C in an evacuated flask with a measured volume of 30.0L. When all the gas has be
White raven [17]

Answer:

Moles of carbon dioxide gas is 0.584 moles.

Mass of 0.584 moles of carbon dioxide gas is 25.7  g

Explanation:

Using ideal gas equation

PV = nRT

where,

P = Pressure of gas = 0.480 atm

V = Volume of gas = 30.0 L

n = number of moles of gas = ?

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of gas = 27°C = 300.15 K

Putting values in above equation, we get:

(0.480 atm)\times 30.0 L=n\times (0.0821L.atm/mol.K)\times 300.15K\\\\n=0.5844 mol\approx 0.584

Moles of carbon dioxide gas = 0.584 moles

Mass of 0.584 moles of carbon dioxide gas = 0.584 mol × 44 g/mol = 25.69 g ≈ 25.7  g

5 0
3 years ago
1. A solution at 25 degrees Celsius is 1.0 × 10–5 M H3O+. What is the concentration of OH– in this solution?
Kazeer [188]

1. Answer:

1.0 × 10–9 M OH–

Explanation:

pH = -Log[H+]

pOH = -Log[OH-]

But;

pH + pOH = 14

Therefore;

[H+] + [OH-] = 1.0 × 10^-14 M

Therefore;

[OH-] = 1.0 × 10^-14 M - (1.0 × 10^–5 M)

         = 1.0 × 10^-9 M OH–

2. Answer;

pH = 7.28

Explanation;

pH = -Log[H3O+]

Given;

[H3O+] = 5.2 × 10^–8 M

Therefore;

pH = - log [5.2 × 10^–8 M]

     = 7.28

The pH is 7.28

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which is the correct name for P205?
    14·1 answer
  • How many moles of LiOH are required to prepare 1.50L of 5.4 M LiOH?
    9·1 answer
  • Calculate the volume in mL of 1 mole of pure ethanol
    7·1 answer
  • Which has more energy an electron close to the nucleus of an Atom or an electron farther away from the nucleus?
    9·2 answers
  • Balance this equation <br><br> ___ HCIO4 + ____ P4O10 —&gt; ___ CI2O7 + ___ H3PO4
    5·1 answer
  • PLZZ HELPP WILL MARK BRAINLIEST
    10·1 answer
  • Consider an amphoteric hydroxide, M ( OH ) 2 ( s ) , where M is a generic metal. M ( OH ) 2 ( s ) − ⇀ ↽ − M 2 + ( aq ) + 2 OH −
    7·1 answer
  • 2. Classify the following solutions as acidic, basic, or neutral at 25OC.
    11·1 answer
  • The atomic number of an atom with 14 neutrons and a mass of 27 is<br> 27<br> 1<br> 13
    11·2 answers
  • An atom with an atomic number of 10 and a mass number of 24 would have ________.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!