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1 year ago

Classify each of the following as abiotic or biotic.

Chemistry

2 answers:

melomori [17]1 year ago

8 0

Uhm a.
i dont really kniw what the answer is but its okay youll figure it out

mars1129 [50]1 year ago

7 0

Answer:

Explanation:

<h3>#I'm not sure</h3><h3>#happy learning</h3>

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What is the empirical formula of a compound that is 18.8% Li, 16.3% C , and 64.9% O

zlopas [31]

Greetings!

To find the empirical formula you need the relative atomic mass of each element!

Li = 6.9

C = 12

O = 16

You can simply change the percentages into full grams

Li = 18.8g

C = 16.3g

O = 64.9

Then you use this to find the Number of moles = amount in grams / atomic mass

Li = 18.8 ÷ 6.9 = 2.7246

C = 16.3 ÷ 12 = 1.3583

O = 64.9 ÷ 16 = 4.0562

Then divide each number of moles by the smallest value:

Li = 2.7246 ÷ 1.3583 = 2.0

C = 1.3583 ÷ 1.3583 = 1

O = 4.0562 ÷ 1.3583 = 2.9 ≈ 3

So that means that there are 2 Li, 1 C, and 3 O

Empirical formula would be:

Li₂CO₃

Hope this helps!

3 0

2 years ago

Which best describes how Dalton's early theory of atomic structure differs with modern theories? He did not know -

Alja [10]

John Dalton introduced a theory proposing that elements vary because of the mass of their atoms.
He said in his theory that all matter is made up of indivisible blocks called atoms. He also stipulated in his theory that elements are identical thus, have different sizes and masses.
Dalton's theory was different from Niels Bohr who proposed a new atomic model which was also commonly known as the modern atomic theory. Bohr's theory says that atoms are arranged in circular orbits around the nucleus. He patterned his model as the solar system.

4 0

2 years ago

Which statement is part of the kinetic molecular theory?

Zigmanuir [339]

Answer:

Explanation:

Kinetic Molecular Theory states that gas particles are in constant motion and exhibit perfectly elastic collisions.The average kinetic energy of a collection of gas particles is directly proportional to absolute temperature only.

7 0

3 years ago

Read 2 more answers

A motor cyclist starts from rest and reaches a speed of 6m/s after travelling with uniform acceleration for 3s. What is his acce

choli [55]

Answer:

2m/s²

Explanation:

When an object starts or at its state of rest it has an Initial speed U = 0

Final speed = 6m/s

total time taken for the acceleration = 3s

Acceleration =?

Acceleration is the change in velocity (speed) with time

Time rate of change of velocity

Acceleration = Change in Speed(velocity)

Time taken

Hence,

Acceleration =  V - U 

a = 6 - 0

a = 6 

a = 2m/s²

4 0

2 years ago

Compound A reacts with Compound B to form only one product, Compound C, and it's known the usual percent yield of C in this reac

frez [133]

Given :

Compound A reacts with Compound B to form only one product, Compound C.

The usual percent yield of C in this reaction is 40%.

10.0 g of A are reacted with excess Compound B, and 6.4 g of Compound C

To Find :

The theoretical yield of C.

Solution :

We know, % yield is given by :

$\%\ yield = \dfrac{actual\ yield}{theoretical\ yield }\times 100$

Putting given values , we get :

$40 = \dfrac{6.4}{theoretical\ yield }\times 100\\\\theoretical\ yield=\dfrac{6.4\times 100}{40}\\\\theoretical\ yield=16\ g$

Therefore, theoretical yield of C is 16 g.

Hence, this is the required solution.

7 0

2 years ago