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2 years ago

I am soo happy merry Christmas in advance paro

Chemistry

2 answers:

JulsSmile [24]2 years ago

8 0

merry Christmas yashu.....love u lot....my ❤

quester [9]2 years ago

6 0

Answer:

Aww you too I am super excited for Christmas hby>

Explanation:

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What would be the formula for diphosphorus pentoxide? A. PO5 B. P2O5 C. P5O D. P5O2

Dovator [93]

I am sure, the answer is variant B.

6 0

2 years ago

Read 2 more answers

Nitrogen effuses through a pinhole 1.7 times as fast as another gaseous element under the same conditions. Estimate the other el

marysya [2.9K]

Answer:

80.92, Krypton

Explanation:

What is effusion?

• It is a process where gas escapes through a pinhole (a very small hole) into a region of low pressure or vacuum

Graham's law of effusion of gas

• states that at a given constant temperature and pressure, the rate of effusion of gases is inversely proportional to the square root of their molar masses

$\boxed{ \frac{Rate_1}{Rate_2} = \sqrt{ \frac{M_2}{M_1} } }$

Calculations

Nitrogen exist as N₂ at room temperature, thus its molar mass is 2(14)= 28.

Let the rate and molar mass of unknown gas be Rate₂ and M₂ respectively.

Since N₂ effuses 1.7 times as fast as the unknown gas,

Rate₁= 1.7(Rate₂)

$\frac{Rate_1}{Rate_2} = 1.7$

$1. 7 = \sqrt{ \frac{M_2}{28} }$

Square both sides:

$2.89 = \frac{M_2}{28}$

Multiply both sides by 28:

2.89(28)= M₂

M₂= 80.92

Identity of gas

The molar mass of 80.92 lies between Bromine and Krypton. However since Bromine exist as Br₂, the value of it's molar mass would be 159.8 instead. Hence, Bromine is eliminated.

If the gas is a diatomic element, the atomic weight is 80.92 ÷2= 40.46. Thus, we are now considering if Argon could be its identity. However, Argon is a noble gas and will not exist as a diatomic element. Argon is therefore eliminated too.

Thus based on the above reasoning, its probable identity is Krypton.

7 0

2 years ago

Photographs are taken of falling drops of two different liquids: Liquid X Liquid Y Note: the drops have identical volumes. Notic

aliina [53]

Answer:

See explanation

Explanation:

The reason why the droplets are spherical is the surface area to volume ratio of the falling droplet in a gravitational field. Recall that a sphere has a small surface area to volume ratio.

Between X and Y, one key difference that will define the rate at which the two drops of liquid falls is the viscosity of the fluid. Since the images were not attached, I can not really tell what liquid droplet is more flatter than the other.

However, the liquid with a greater surface tension will form larger droplets and experience a greater air resistance as the droplet falls. Hence the less the surface tension, the flatter the droplets. Cohesive forces pull molecules of a liquid droplets inwards leading to a more spherical shape and reducing the surface area. Surface tension is therefore the reason why liquids form droplets.

7 0

2 years ago

Help me with this work plz plz

storchak [24]

Answer:

a -4

b - 8

c - 5

d 2

Explanation:

Significant Figures: The number of digits used to express a measured or calculated quantity. By using significant figures, we can show how precise a number is. ... Accuracy: Refers to how closely individual measurements agree with the correct or true value.

7 0

2 years ago

Salicylamide can undergo an iodination by electrophilic aromatic substitution. Arrange the procedural steps in order to iodinate

Tanzania [10]

The procedural steps in order to get iodinate salicylamide are as follows:

It begins first at a laboratory.
Secondly, one has to dissolve salicylamide in ethanol.
Then one has to add sodium iodide.
Later on, one has to add sodium hypochlorite to the ice cold solution of salicylamide and sodium iodide.
Thereafter one has to sodium thiosulfate.
It is better to Acidify by a person adding about 10% of HCl.
The one has to collect the crude product through the use of vacuum filtration.
Lastly one then Recrystallize from hot ethanol.

<h3>What is Electrophilic aromatic substitution?</h3>

The Electrophilic aromatic substitution is known to be a kind of an organic reaction where an atom is said to be added or attached to a kind of aromatic structure (that is made up of hydrogen) is said to be replaced by an electrophile.

Learn more about electrophilic aromatic substitution from

brainly.com/question/14908357

4 0

2 years ago

I am soo happy merry Christmas in advance paro​

I am soo happy merry Christmas in advance paro