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
Bas_tet [7]
3 years ago
12

Mendeleev noticed that certain similarities in the chemical properties of elements appeared at regular intervals when teh elemen

ts were arranged in order of increasing
Chemistry
1 answer:
Serga [27]3 years ago
8 0
Dmitri Mendeleev was born in Siberia, Russia. He was known to be very passionate about chemistry. His discovery of the repetitive properties common to objects with the same interval led to his development of the earliest version of the Periodic Table of Elements. With this, he was able to develop easier way to organize subjects. 
You might be interested in
Explain how index minerals allow a scientist to understand the history of a metamorphic rock?
Masteriza [31]
It allows a scientist to understand the history of metamorphic rock by estimating the temperature, depth, and pressure at which a rock undergoes metamorphism. Hope that helped!
5 0
3 years ago
Read 2 more answers
Think of a resource and predict What happens to the resource when competition for it increases
MatroZZZ [7]
Lets say foxes hunt rabbits. If their are too many foxes then they will compete for the rabbits. The rabbits get outnumbered by the amount of foxes so the foxes kill all the rabbits and the rabbits could eventually go extinct.
3 0
3 years ago
Which of the following are advantages of the SI system?
lions [1.4K]
The correct answer is A, B and C
3 0
3 years ago
Read 2 more answers
How does cooler air move in relation to warmer air?
ladessa [460]
Answer:
Cool air moves down while hot air rises
7 0
3 years ago
How many moles are in 39.5 grams of Lithium?
Blizzard [7]

Answer:

185.05 g.

Explanation

Firstly, It is considered as a stichiometry problem.

From the balanced equation: 2LiCl → 2Li + Cl₂

It is clear that the stichiometry shows that 2.0 moles of LiCl is decomposed to give 2.0 moles of Li metal and 1.0 moles of Cl₂, which means that the molar ratio of LiCl : Li is (1.0 : 1.0) ratio.

We must convert the grams of Li metal (30.3 g) to moles (n = mass/atomic mass), atomic mass of Li = 6.941 g/mole.

n = (30.3 g) / (6.941 g/mole) = 4.365 moles.

Now, we can get the number of moles of LiCl that is needed to produce 4.365 moles of Li metal.

Using cross multiplication:

2.0 moles of LiCl → 2.0 moles of Li, from the stichiometry of the balanced equation.

??? moles of LiCl → 4.365  moles of Li.

The number of moles of LiCl that will produce 4.365 moles of Li (30.3 g) is (2.0 x 4.365 / 2.0) = 4.365 moles.

Finally, we should convert the number of moles of LiCl into grams (n = mass/molar mass).

Molar mass of LiCl = 42.394 g/mole.

mass = n x molar mass = (4.365 x 42.394) = 185.05 g.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Toaster pops up knocks over ball what type of energy is that ?
    7·1 answer
  • Why are atoms more stable when combined?
    10·1 answer
  • Does anyone have any information about "trititanium pentoxide" or "titanium oxide"? ​
    13·1 answer
  • In very early human history, complex sanitation systems were not needed because settlements were usually very small, like the vi
    13·1 answer
  • What are 3 ways to seperate metal particles and salt
    8·1 answer
  • A reproducible measurement is an accurate one. A. True B. False
    11·2 answers
  • Which of the following happen because of an increase in thermal energy/temperature? (Select all that apply)
    8·2 answers
  • How many grams of na2co3 would be needed to produce 1000g of nahco3
    14·1 answer
  • When a sample of liquid is heated, its thermal energy _______.
    15·1 answer
  • Rocks are classified as sedimentary, metamorphic, or igneous on the basis of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!