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3 years ago

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Chemistry

1 answer:

ASHA 777 [7]3 years ago

4 0

Answer:

Hey mate hope its help you........

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Which property is common to noble gases?

ira [324]

The answer is B- Low reactivity.

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Explain how Newton's idea about inertia has helped in astronomy?

lilavasa [31]

Answer:

the answer is A because when something is going straight it wont change unless its acted upon by a force

Explanation:

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Neutral atoms of argon, atomic number 18, have the same number of electrons as each of the following items except: Cl- S -2 K+ C

irinina [24]

Answer:

Ne.

Explanation:

Neutral argon, atomic number 18, has 18 electrons.

Cl⁻:

Neutral atom of Cl, atomic number 17, has 17 electrons.

When it gains electron and be Cl⁻, then it has 18 electrons a neutral Ar.

S²⁻:

Neutral atom of S, atomic number 16, has 16 electrons.

When it gains 2 electrons and be S²⁻, then it has 18 electrons a neutral Ar.

K⁺:

Neutral atom of K, atomic number 19, has 19 electrons.

When it losses electron and be K⁺, then it has 18 electrons a neutral Ar.

Ca²⁺:

Neutral atom of Ca, atomic number 20, has 20 electrons.

When it losses 2 electrons and be Ca²⁺, then it has 18 electrons a neutral Ar.

Ne:

It is a noble gas that has 10 electrons.

So, the right choice is: Ne.

3 0

3 years ago

Calculate sound speed in hydrogen H2 at temperture 50 C degree. Answer give in meter per second.

irina [24]

Answer:

The speed of sound in hydrogen gas is 361.5 $^{\circ} C$

Explanation:

It is given that the temperature is 50 $^{\circ} C$ .

The speed of sound in meter per second is calculated by an equation.

The equation states that speed of the sound in meter per second is equal to the sum of the product of the temperature in degree celsius with 0.60 and a constant that is 331.5.

The equation is written as:

$speed \ of \ sound \left(m/s \right) = 0.60 \times T + 331.5$

Put the value of T = 50 then the equation becomes,

$speed \ of \ sound \left(m/s \right) = 0.60 \times 50 + 331.5$

Speed of sound (in m/s) = 361.5 m/s

4 0

3 years ago