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3 years ago

State mandeelev's periodic law explain mandeelev's periodic table with its limitation

1 answer:

5 0

Answer: Mendeleev's periodic law : The properties of element are a periodic function of the atomic masses . Limitations:-(1)positions of hydrogen is not correctly placed. (2) The positions of isotopes could not be explained . For ex:- cl35 are cl37 are placed in the same group.

Explanation:

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How to write equations and show units for the Total joules gained by water for the Pringle and the Total Joules per gram of food

Paraphin [41]

Answers:

1. 7500 J; 3800 J/g

Step-by-step explanation:

1. Joules gained by water

q = mcΔT

Data:

m = 100 g

C = 4.184 J·°C⁻¹g⁻¹

ΔT = 18 °C

Calculation:

q = 100 × 4.184 × 18 =7500 J

2. Joules per gram of Pringle

Energy gained by water = energy lost by Pringle

q = -mΔH

7500 J = -1.984 g × ΔH

ΔH = -7500 J/1.984 g = -3800 J/g

Pringles contain 3800 J of food energy per gram.

7 0

3 years ago

4al + 3o2 → 2al2o3 indicate how many electrons are transferred in the formation of one formula unit of product.

nekit [7.7K]

The balanced reaction is:

Each Aluminum atom wants to lose 3 electrons to become isoelectronic with Oxygen. Each Oxygen on the other hand wants to gain 2 electrons. Since the reaction shows 6 Oxygen atoms in the product and each want to gain 2 electrons, therefore a total of 12 electrons are transferred. Since the problem ask for the electrons transferred per formula unit, hence:

<span>6 electrons (ANSWER)</span>

6 0

3 years ago

Limonene is one of the compounds that give lemons their tangy odor. Show the structures of the products expected when limonene r

iVinArrow [24]

Answer:

Explanation:

The alkene reactions in general are addition or oxidation reactions. For the addition reaction, we have to take into account that some of them are marknonikov and other anti-markovnikov. Also for the addition reaction, we will have to take into account if we will have anti or syn products. In the oxidation reaction, we have to know the specifics for each reaction. If the reaction can go to the highest oxidation level, is the double bond is broken, etc.

Each reaction has its <u>specific characteristics</u> (see figures 1 and 2).

3 0

4 years ago

What mass of Al2(SO4)3 results from mixing 12.93 g of AlCl3 with 10.34 g of (NH4)2SO3 as shown with a 54.2% yield?

avanturin [10]

Mass of Al₂(SO₄)₃ : 4.822 g

<h3>Further explanation </h3>

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

2AlCl₃ + 3(NH₄)₂SO₄⇒Al₂(SO₄)₃+ 6NH₄Cl

MW AlCl₃ :133,34 g/mol

MW (NH₄)₂SO₄ : 132,14 g/mol

MW Al₂(SO₄)₃ : 342,15 g/mol

mol AlCl₃

$\tt mol=\dfrac{12.93}{133.34}=0.097$

mol (NH₄)₂SO₄

$\tt mol=\dfrac{10.34}{132.14}=0.078$

Limitng reactants (ratio mol : coefficient = the smaller)

AlCl₃ : (NH₄)₂SO₄ =

$\tt \dfrac{0.097}{2}:\dfrac{0.078}{3}=0.0485:0.026$

(NH₄)₂SO₄ ⇒ limiting reactants

So mol Al₂(SO₄)₃ from (NH₄)₂SO₄

$\tt \dfrac{1}{3}\times 0.078=0.026$

mass Al₂(SO₄)₃

$\tt 0.026\times 342.15=8.896$

with 54.2% yield, the mass of Al₂(SO₄)₃

$\tt 0.542\times 8.896=4.822~g$

7 0

3 years ago

When writing an electron configuration for a transition metal, what is the last orbital type to be filled – an s, p, d or f orbi

Black_prince [1.1K]

It would be d.

Reason being said...

the electron configuration normally goes like this...

1s2 2s2 2p6 3s2 3p6 4s2....

until you hit the transition metals..remember those have a special rule..

even though you are in the 4 sublevels for the orbitals ... it goes down 1

Making it 3d..(1,2,3,4,5,6,7,8,9,10)

Going on...

at 5s2 then, 4d1, 4d2, 4d3, 4d4, etc..

at 6s2 then, 5d1, 6d2, 6d3, 6d4, etc..

Thus, D orbital is your answer.

4 0

4 years ago

State mandeelev's periodic law explain mandeelev's periodic table with its limitation ​

State mandeelev's periodic law explain mandeelev's periodic table with its limitation