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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. 
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How many grams are in 4 moles of aluminum phosphate
vladimir2022 [97]

Answer:

487.8116

Explanation:

4 0
3 years ago
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What volume of carbon dioxide gas at STP is required to produce 456.9g of lithium carbonate?
Margarita [4]

Answer:

It would have to be around 9.8 volume

Explanation:

7 0
3 years ago
(Please help will mark brainliest!)
arsen [322]

We know that Weighted atomic mass of Element is Calculated based upon their existence of isotopes and the Relative abundance of these isotopes.

Given that the Element X is Composed of :

Isotope                       Relative abundance                   Atomic Mass

⁵⁵X                                        70%                                               55

⁵⁶X                                        20%                                               56

⁵⁷X                                        10%                                                57

Weighted Atomic Mass of Element X :

= (0.70)(55) + (0.20)(56) + (0.10)(57)

= 38.50 + 11.2 + 5.70

= 55.4

So, the Weighted Atomic Mass of Element X is 55.4

6 0
2 years ago
Many computer chips are manufactured from silicon, which occurs in nature as SiO2. When SiO2 is heated to melting, it reacts wit
riadik2000 [5.3K]

Answer:

A) SiO2 is the limiting reactant

B) Theoretical yield= 72333.3g

C) % yield =91.5%

Explanation:

SiO2(s) + 2C(s) --------------> Si(s) + 2CO(g)

n(SiO2)= 155000/60 = 2583.33 mols

n(C)= 79000/12= 3291.66 mols

a)SiO2 is the limiting reactant

According to the balanced reaction equation,

60g of SiO2 produced 28g of SiO2

155000g of SiO2 will produce 155000×28/60= 72333.3g

Therefore theoretical yield of Si= 72333.3g

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5 0
3 years ago
The United States has about which percentage of the world's coal reserves?
aev [14]

Answer:

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Explanation:

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3 years ago
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