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slavikrds [6]
4 years ago
12

Elements in the same group have _____. the same number of electron shells the same atomic number similar chemical properties the

same number of electrons
Chemistry
2 answers:
Bezzdna [24]4 years ago
6 0
They have similar valence electrons and properties
Vlad1618 [11]4 years ago
6 0
Similar valence electrons and chemical and physical properties!
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The equilibrium of 2H 2 O(g) 2H 2 (g) + O 2 (g) at 2,000 K has a Keq value of 5.31 x 10-10. What is the Keq expression for this
nevsk [136]

Answer:

5.31*10^{-10} = \frac{[]H_{2}]^{2}[O_{2}]}{[H_{2}O]^{2}}

Explanation:

For a chemical reaction, equilibrium is a state at which the rate of the forward reaction equals that of the reverse reaction. The equilibrium constant Keq is a parameter characteristic of this state which is expressed as a ratio of the concentration of the products to that of the reactants.

For a hypothetical reaction:

xA + yB ⇄ zC

The equilibrium constant is :

Keq = \frac{[A]^{x}[B]^{y}}{[C]^{z} }

The given reaction involves the decomposition of H2O into H2 and O2

2H_{2}O\rightleftharpoons 2H_{2} + O_{2}

The equilibrium constant is expressed as :

Keq = \frac{[]H_{2}]^{2}[O_{2}]}{[H_{2}O]^{2}}

Since Keq = 5.31*10^-10

5.31*10^{-10} = \frac{[]H_{2}]^{2}[O_{2}]}{[H_{2}O]^{2}}

3 0
3 years ago
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Under which conditions of temperature and pressure, the real gas behave ideally?​
labwork [276]

Answer:

A real gas will act as an ideal gas under high temperature and at a low pressure.

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An ideal gas has molecules that occupy negligible space and have no interactions, and which consequently obeys the gas laws exactly.

Explanation:

8 0
2 years ago
Explain why scientists find the particulate matter of theory useful
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This idea has historical significance. The ancient Greek philosopher Democritus (born 460 BCE), who held that everything is composed of small particles moving in empty space, is credited with developing the first hypothesis we have about the microscopic universe. He had some concrete proof for this, such the fact that items like a new loaf of bread or a rose may give off a scent even when they are far from the source. Being a materialist, he thought that these odors originated from actual material particles released by the bread or the rose, rather than being purely a type of magic. He reasoned that these particles must float through the air, with some of them maybe landing in your nose where you can smell them immediately. This still makes sense in modern times. But many of us now have quite different perspectives on these "particles."

Thank you,

Eddie

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2 years ago
A teacher cut an apple into three wedges of the same size. She dipped one wedge in lemon juice, dipped another in water, and lef
aleksandrvk [35]

Answer:

The responding variable of this experement is the outcome and that would be  that the one in lemon juice responded and the one  in water didn't (the other one is the control). Thus the responding varible is the one in lemon juice.

Explanation:

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Can someone help me out real quick? Thanks!
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I think the answer is B.

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