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3 years ago

When a sodium atom becomes an ion the size of the atom?

1 answer:

3 0

The size of atom reduces

Electronic configuration of sodium -
2,8,1

In order to become stable it loses one electron and becomes positive ion.
It's size reduces.

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What function do mirrors serve in reflecting telescopes????

UkoKoshka [18]

Enlarge image i think

4 0

3 years ago

At 300.0 K and 0.987 atm pressure, what will be the volume of 2.30 mol of Ne?

Nadya [2.5K]

Answer:

V = 57.39 L

Explanation:

Given that,

Temperature, T = 300 K

Pressure, P = 0.987 atm

No. of moles of Ne, n = 2.30 mol

We need to find the volume of Ne. We know that, the ideal gas law is as follows :

PV = nRT

Where

P is pressure and R is gas constant

$V=\dfrac{nRT}{P}\\\\V=\dfrac{2.3\times 0.0821\times 300}{0.987 }\\\\V=57.39\ L$

So, the volume of the Ne is 57.39 L.

3 0

3 years ago

Given the reaction to 2NaOH + H2 SO4 â Na2 SO4 + 2H2 O, what is the total number of grams of NaOH needed to react completely wit

vfiekz [6]

Answer:

4 moles, 160 g

Explanation:

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

For $H_2SO_4$ :-

Mass of $H_2SO_4$ = 196 g

Molar mass of $H_2SO_4$ = 98 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{196\ g}{98\ g/mol}$

$Moles\ of\ Sulfuric\ acid= 2\ mol$

According to the given reaction:

$2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O$

1 mole of sulfuric acid reacts with 2 moles of NaOH

So,

2 moles of sulfuric acid reacts with 2*2 moles of NaOH

Moles of NaOH must react = 4 moles

Molar mass of NaOH = 40 g/mol

Mass = Moles*molar mass = $4\times 40\ g$ = 160 g

7 0

3 years ago

Examine the nuclear reaction: 1 1 H+ 1 0 n -> 2 1 H.

Lera25 [3.4K]

1) Conversion of an isotope one chemical element or an isotope into another chemical element is called as nuclear transmutation.

2) In a nuclear transmutation reactions can be achieved either due to radioactive decay or due to nuclear reactions.

3) In this technique, it is possible to convert a stable element into radioactive atom by bombarding in with high speed particles. The initial stable nuclei is referred as parent nuclei, the fast moving particle is referred as projectile while new element which is formed is called as daughter element.

4) In the present reaction:
1 1 H+ 1 0 n -> 2 1 H
1 1H is a parent nuclei which is bombarded with the fast moving projectile
(1 0 n) to generate a new daughter nuclei (2 1H).

6 0

4 years ago

Estimate the air pressure at an altitude of 5km

r-ruslan [8.4K]

The answer is 100 kg

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3 years ago