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
serg [7]
2 years ago
5

The existence of isotopes violates one of the original ideas of Dalton's atomic theory. Which one?

Chemistry
1 answer:
Colt1911 [192]2 years ago
3 0

Explanation:

One of the Dalton's postulates states that:

The atoms of same element are similar in the shape and the mass and other properties but different from atoms of other elements.

But the existence of isotopes violates this postulate because isotopes are the species which have same atomic number but different atomic mass. <u>For example, carbon exist in three isotopes which are C-12, C-13 and C-14 and have different mass and some properties and is a contradiction of this postulate.</u>

You might be interested in
2. Suppose that 21.37 mL of NaOH is needed to titrate 10.00 mL of 0.1450 M H2SO4 solution.
AysviL [449]

Answer:

0.1357 M

Explanation:

(a) The balanced reaction is shown below as:

2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O

(b) Moles of H_2SO_4 can be calculated as:

Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}

Or,

Moles =Molarity \times {Volume\ of\ the\ solution}

Given :

For H_2SO_4 :

Molarity = 0.1450 M

Volume = 10.00 mL

The conversion of mL to L is shown below:

1 mL = 10⁻³ L

Thus, volume = 10×10⁻³ L

Thus, moles of H_2SO_4 :

Moles=0.1450 \times {10\times 10^{-3}}\ moles

Moles of H_2SO_4  = 0.00145 moles

From the reaction,

1 mole of H_2SO_4 react with 2 moles of NaOH

0.00145 mole of H_2SO_4 react with 2*0.00145 mole of NaOH

Moles of NaOH = 0.0029 moles

Volume = 21.37 mL = 21.37×10⁻³ L

Molarity = Moles / Volume = 0.0029 /  21.37×10⁻³  M = 0.1357 M

7 0
3 years ago
This graph shows the solution to the inequality y &gt; 3x + 14 and y &lt; 3x + 2
erik [133]

For apex the answer is no solution

7 0
3 years ago
Explain hydrogen bonding.
denis23 [38]

Answer:

Hydrogen bonding, interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces. Hydrogen bonds can exist between atoms in different molecules or in parts of the same molecule.

Explanation:

3 0
3 years ago
What 3 categories are elements divided
cricket20 [7]
Classification of the Elements. The next thing in our review is to classify the elements into three groups. These three groups are: metals, nonmetals, and inert gases. Let's look at where these groups are located on the periodic table and correlate them with the ability to lose and gain electrons.
6 0
3 years ago
Sunlight is more spread out as you move away from the equator.
suter [353]

Answer:

False.

Explanation:

<u>The given statement asserts a false claim because the equator is the region that receives maximum sunlight</u>. The equator is placed right below the sun and thus, it tends to receive the maximum radiation across the year. While the poles are the coldest regions of the Earth because due to Earth's titled axis, they receive very few sun rays for a certain time of the year. Thus, <u>if we move away from the equator, we are likely to receive less radiation from the sun as the sun keeps getting farther while moving away from the equator</u>.

3 0
2 years ago
Other questions:
  • Am I correct? Because I’m kinda in between answers
    12·2 answers
  • In nuclear fusion what occurs????
    10·2 answers
  • Using the round 2 fasttrack bond table (page 2), how is digby's "yield" calculated for their 10.0s2020 bond?
    7·1 answer
  • Nonliving things have cells.<br><br> True<br> False
    5·2 answers
  • Nature operates the same way everywhere in the universe except where we have evidence
    11·2 answers
  • If motor bike travels 2.4 km in 5 min find it average velocity?​
    10·1 answer
  • What season starts in the northern hemisphere as the suns direct rays strike the equator moving from the southern hemisphere to
    7·1 answer
  • What are the possible values of ml for l=2<br> ​
    6·1 answer
  • 15. What are the benefits to having a nuclear power plant nearby?
    7·1 answer
  • 10. What is the mass of 2.6 moles of Ag?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!