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
Hitman42 [59]
3 years ago
11

Dalton hypothesesized that atoms are indivisible and that all atoms of an element are identical. it is now known that

Chemistry
1 answer:
Katena32 [7]3 years ago
6 0

i don't understand but atoms are made of electrons an protons and neutrons..

You might be interested in
Consider the following reaction:
adell [148]

Answer:

1. d[H₂O₂]/dt = -6.6 × 10⁻³ mol·L⁻¹s⁻¹; d[H₂O]/dt = 6.6 × 10⁻³ mol·L⁻¹s⁻¹

2. 0.58 mol

Explanation:

1.Given ΔO₂/Δt…

    2H₂O₂     ⟶      2H₂O     +     O₂

-½d[H₂O₂]/dt = +½d[H₂O]/dt = d[O₂]/dt  

d[H₂O₂]/dt = -2d[O₂]/dt = -2 × 3.3 × 10⁻³ mol·L⁻¹s⁻¹ = -6.6 × 10⁻³mol·L⁻¹s⁻¹

 d[H₂O]/dt =  2d[O₂]/dt =  2 × 3.3 × 10⁻³ mol·L⁻¹s⁻¹ =  6.6 × 10⁻³mol·L⁻¹s⁻¹

2. Moles of O₂  

(a) Initial moles of H₂O₂

\text{Moles} = \text{1.5 L} \times \dfrac{\text{1.0 mol}}{\text{1 L}} = \text{1.5 mol }

(b) Final moles of H₂O₂

The concentration of H₂O₂ has dropped to 0.22 mol·L⁻¹.

\text{Moles} = \text{1.5 L} \times \dfrac{\text{0.22 mol}}{\text{1 L}} = \text{0.33 mol }

(c) Moles of H₂O₂ reacted

Moles reacted = 1.5 mol - 0.33 mol = 1.17 mol

(d) Moles of O₂ formed

\text{Moles of O}_{2} = \text{1.33 mol H$_{2}$O}_{2} \times \dfrac{\text{1 mol O}_{2}}{\text{2 mol H$_{2}$O}_{2}} = \textbf{0.58 mol O}_{2}\\\\\text{The amount of oxygen formed is $\large \boxed{\textbf{0.58 mol}}$}

8 0
3 years ago
20 points please help
exis [7]

The answer should be A, flammability.


The isotopes of the same element would result in the same chemical properties, as the number of protons and electrons are not changed, meanwhile, the physical properties would be slightly different with each other because they have different numbers of electrons.


Out of the 4 options, only option A is a chemical property. Chemical properties are the properties of an element reacting with other substances that creates new substances at the end. While physical properties are the ones that does not produces new substances or any reactions. They are usually observable and measurable.


Therefore, since flammability is a chemical property, the answer is A.

6 0
2 years ago
Provide a definition of a closed system.
tensa zangetsu [6.8K]

Answer:

A closed system is a physical system that does not allow transfer of matter in or out of the system, though, in different contexts, such as physics, chemistry or engineering, the transfer of energy is or is not allowed.

Explanation:

5 0
2 years ago
Read 2 more answers
Cells are differentiated when
Serjik [45]

Answer:

D I think.............

4 0
3 years ago
Please heeelp to solve these problems​
Darya [45]

Answer:

Q.89

Alkane - CnH(2n+2)

given that 8 H = > 8= 2n+2

therefore n= 3

C3H8 = 12×3 + 8×1= 36 +8 = 44

4 0
3 years ago
Other questions:
  • 4. Will the net force be balanced or unbalanced?<br> 7N<br> 4N<br> A. Balanced<br> B. Unbalanced
    5·1 answer
  • The products of a combustion reaction do NOT include ____. (1 point) water carbon dioxide carbon monoxide hydrogen The products
    10·2 answers
  • A calorimeter was used to measure the heat change when an ionic compound dissolves in water. The final mass of the contents of t
    13·1 answer
  • Myth: A dead organism is the same as a nonliving thing in science.<br><br> Fact:<br><br> Evidence:
    8·2 answers
  • Help im stuck on a problem
    15·2 answers
  • An atom of aluminum (Al) has an atomic number of 13 and a mass number of 27. How many neutrons does it have? O A. 27 O B. 40 O C
    9·1 answer
  • Assuming that each cubic centimeter of water has a mass of exactly 1 g, find the mass of 1.27 cubic meter of water.
    5·1 answer
  • What are common chemicals used for lemons include fertilizer pesticide fungicide and herbicide chemicals that are typically util
    13·1 answer
  • How could the winds flowing in a certain direction affect air masses and where they may collide?
    10·1 answer
  • Which SI unit would be most appropriate for expressing the mass of this animal?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!