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
Gelneren [198K]
2 years ago
8

What was the contribution of Dobereiner towards classification of elements?​

Chemistry
2 answers:
Liono4ka [1.6K]2 years ago
6 0

<em>that the relative atomic mass of the middle element in each triad was close to the average of the relative atomic masses of the other two elements.</em>

  • <em>This gave other scientists a clue that relative atomic masses were important when arranging the elements.</em>

<h2><em>hope</em><em> </em><em>it</em><em> </em><em>helps!</em></h2>
Kitty [74]2 years ago
6 0

<em><u /></em><em><u>In 1829, Johann Döbereiner recognised triads of elements with chemically similar properties, such as lithium, sodium and potassium, and showed that the properties of the middle element could be predicted from the properties of the other two</u></em>.

You might be interested in
Which of the following is not a nanoscale object?
Radda [10]
I think it is an oxygen atom, I am not completely sure though.
3 0
3 years ago
Read 2 more answers
How many minutes will it take for the quantity of n2o5 to drop to 1.9×10−2 mol ?
Novay_Z [31]

<span>Missing question: The first-order rate constant for the decomposition of N2O5, 2N2O5(g)→4NO2(g) + O2(g) at 70°</span><span>C is 6.82×10−3 s−1. Suppose we start with 2.70×10−2 mol of N2O5(g) in a volume of 1.8 L .
</span>c₀(N₂O₅) = 0,027 mol ÷ 1,8 L.<span>
c</span>₀(N₂O₅) = 0,015 mol/L.<span>
c(N</span>₂O₅) = 0,019 mol/ 1,8 L = 0,01055 mol/L.<span>
k = 6,82·10</span>⁻³ s⁻¹.<span>
ln c(N</span>₂O₅) = ln c₀(N₂O₅) - k·t.<span>
t = (ln c</span>₀(N₂O₅) - ln c(N₂O₅)) ÷ k.<span>
t = 0,35 ÷ 0,00682 s</span>⁻¹.<span>
t = 51 s = 0,86 min.</span>

3 0
3 years ago
A biochemist would most likely study what ?
Molodets [167]

Answer:

Biochemists study chemical processes and chemical transformations in living organisms. Biochemists study DNA, proteins and cell parts. The word "biochemist" is a portmanteau of "biological chemist."

Explanation:

6 0
3 years ago
1. What are the subatomic particles that all atoms are made of?<br> *
Blababa [14]

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electrons.

4 0
3 years ago
Read 2 more answers
POH is a measure of the ________________ in solution. *
Digiron [165]

Answer:

<u><em>Both acids </em></u>and<u><em> bases</em></u> can measured using the pH or pOH scale. Both scales provide a measure of either the H+ concentration or the OH- concentration. Notice that each scale shows were acids and bases both are located. When acids are measured, the pH is less than 7, but the pOH is greater than 7.

Explanation:

3 0
3 years ago
Other questions:
  • Wind and moving water provide ______________________ energy. chemical
    7·1 answer
  • Which of the following would most likely happen if water did not form hydrogen bonds?
    8·1 answer
  • How many grams of cobalt (II) nitrate, Co(NO3)2, are required to make a 2.20%(w/v) aqueous solution in a 250 mL volumetric flask
    7·1 answer
  • Soil erosion occurs_____
    8·1 answer
  • Which of the following is not a possible sublevel?<br><br> 1p<br> 2s<br> 3d<br> 4f
    10·2 answers
  • What is the density of 2 mol of (He) at STP? (Show work and explain, please!!!)​
    11·1 answer
  • How many moles of ammonia could be obtained from a maximum of 5.0 moles of nitrogen?
    13·1 answer
  • Please help:
    5·1 answer
  • How is total reaction energy calculated?(1 point)
    6·1 answer
  • The number of moles and the mass of carbon dioxide formed by the combustion of 20.0 kg of carbon in an excess of oxygen.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!