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
.
photoshop1234 [79]
If the element have 39 protons, that means that his atomic number is 39, being Yttrium the element. And, the number of protons is the same of the number of electrons, so, 39 electrons.
6 0
3 years ago
Read 2 more answers
How many moles is 62 G of oxygen gas​
Iteru [2.4K]

Answer:

There are 2 moles of oxygen molecules; there are 4 moles of oxygen atoms.

Explanation:

3 0
3 years ago
Which of the following is an example of kinetic energy? (2 points) Select one: a. chemical energy b. gravitational energy c. nuc
Monica [59]
Thermal energy: 
About to submit this quiz ill comment if I'm wrong

7 0
3 years ago
Read 2 more answers
1. According to the equation, what mass of hydrogen fluoride is necessary to produce 2.3 g of sodium fluoride?
Vanyuwa [196]

Answer:

1.096g

Explanation:

You must know the atomic mass of Hydrogen, Fluorine, and Sodium before you can start:

Hydrogen: 1.008g/mol

Fluorine: 18.99g/mol

Sodium: 22.98g/mol

Next, find the composition percentage of NaF

22.98 + 18.99 = 41.97

Fluorine is 18.99/41.97 =45.25%

Sodium is 100-45.25 = 54.75%

Ultimately we want to know about HF so find how much F is in 2.3g: 2.3 * 0.4525 = 1.041g

Find comp. percentage of HF

18.99+1.008 = 19.998; H/total F/total

Hydrogen 5.041%

Fluorine 94.959%

Laws of conservation of say we have 1.041g of fluorine in our HF. We know 1.041 is 94.959% of the mass of HF so do some simple math to find the remaining: 1.041/0.94959 = 1.096g

4 0
3 years ago
Is a CAS number a physical or chemical property
katrin [286]
Chemical


Hope that helps
5 0
3 years ago
Other questions:
  • Name this compound: gaas
    15·2 answers
  • You have two 466.0 mL aqueous solutions. Solution A is a solution of silver nitrate, and solution B is a solution of potassium c
    9·1 answer
  • You work for a company focused on environmental cleanup. Your job is to collect soil samples in the field and bring
    5·1 answer
  • Which is a representation of a compound that gives the number of atoms and types of atoms in that compound? chemical formula sub
    11·2 answers
  • As the volume of a 1 mole sample of gas increases, with the temperature remaining constant, the pressure exerted by the gas:
    14·1 answer
  • Answering just one is fine. Please help. It's due in less than an hour
    6·2 answers
  • What mass of NaOH would need to be dissolved in 500.0 mL of water to produce a solution with a pH of 12.40
    12·1 answer
  • What is the boiling point (in °C) of a 1.56 m
    12·1 answer
  • What is chemical compounds?​
    7·2 answers
  • Select the pH value you would expect for each of these solutions.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!