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
Phantasy [73]
3 years ago
9

What three obstacles did dmitri mendeleev face in his life

Chemistry
2 answers:
Mama L [17]3 years ago
8 0
<span>~He was working without prior knowledge toward creating a periodic table of elements that had been done in Europe in the 1860s

~ scandal when he got married to his second wife before he divorced his first wife

~he was working with data that was not very precise (technology didn't exist at the time to make accurate measurements (e.g., weights) for the things he was working on.) Many elements had also not been discovered yet, so he had to guess at a lot of things when making his conclusions. </span>
OLga [1]3 years ago
6 0

Answer:

Answered

Explanation:

1. He married his second wife before giving divorce to his first wife. This made him an outsider in the scientific community making it difficult for him to raise funds for the research.

2. Back then there were no precise measuring instruments, so it was difficult for him to measure correct data. Many of the elements were yet to be discovered, so he guessed and by fortune most of his guesses were right.

3.The elements that were not discovered at that time, he left blank spaces for them.  

You might be interested in
How many significant figures<br> are in this number?<br> 0.00708900
Norma-Jean [14]
Don’t know sorry 1.627
4 0
3 years ago
Read 2 more answers
Help! Drag and drop the answer into the box to match each method of how to separate solutions to its description.
Flura [38]

Answer:

1) D      2) A       3) C

Explanation:

7 0
3 years ago
Bromine (Br) belongs to the halogen family. Based on the location of the halogens, how many valence electrons does bromine have?
Amanda [17]

Answer:

D. 7

Explanation:

The halogens are found in Group 7 of the Periodic Table. If Bromine is a halogen, then that means it would be found in Group 7. Also, elements in Group 7 have 7 electrons in its outer shell, Bromine would have 7 electrons in its outer shell.

3 0
3 years ago
Read 2 more answers
Calculate the concentration of an aqueous solution of naoh that has a ph of 11.50
Reika [66]
NaOH is a strong base and complete dissociation into Na⁺ and OH⁻ ions. 
Therefore [NaOH] = [OH⁻]
To calculate the [OH⁻], we can first find the pOH as NaOH is a basic solution.
pH + pOH = 14
Since pH = 11.50
pOH = 14 - 11.50
pOH = 2.50
We can calculate [OH⁻] by knowing pOH 
pOH = -log[OH⁻]
[OH⁻] = antilog(-pOH)
[OH⁻] = 3.2 x 10⁻³ M
therefore [NaOH] = 3.2 x 10⁻³ M
7 0
2 years ago
Read 2 more answers
Which of the following equations can be used to calculate pOH?
Ivenika [448]
POH = 14 - pH
pOH = -log [OH-]
6 0
3 years ago
Other questions:
  • What type of bond will form<br><br> Nitrogen and Tellurium
    11·1 answer
  • We wanted to know how temperature affected the volume of a gas. We investigated this by filling a balloon with air and heating a
    15·1 answer
  • A student sets up the following equation to convert a measurement. (The stands for a number the student is going to calculate.)
    12·1 answer
  • Un hidrocarburo tiene como composición en masa: C= 85.8% ; H= 14.2% . Como dato nos brindan que una molécula de este compuesto p
    7·1 answer
  • Cuál es la principal diferencia entre la química orgánica y la inorgánica?
    14·1 answer
  • If u have 10 moles of C2H2 how many mole of O2 would you need
    6·1 answer
  • Which best represents a compound?
    13·1 answer
  • The following molecular scenes depict an important reaction in nitrogen chemistry (nitrogen is blue; oxygen is red): Write a bal
    6·1 answer
  • State the postulates of Dalton's atomic theory. ​
    8·2 answers
  • Pleaseeeeeeeeeeee help this is due today
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!