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satela [25.4K]
3 years ago
13

Element R and Element Q have the same number of valence electrons. These elements have similar chemical behavior, but element R

has fewer energy levels than element Q
Describe what their positions on the Periodic Table have in common.
Chemistry
1 answer:
I am Lyosha [343]3 years ago
7 0

Answer:

I dont now because I am in 6 class

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In a room full of air, the air is mainly composed of Nitrogen and Oxygen molecules (both at room temperature). Find (to two sign
zloy xaker [14]

Explanation:

Expression for the v_{rms} speed is as follows.

            v_{rms} = \sqrt{\frac{3kT}{M}}

where,   v_{rms} = root mean square speed

                     k = Boltzmann constant

                    T = temperature

                    M = molecular mass

As the molecular weight of oxygen is 0.031 kg/mol and R = 8.314 J/mol K. Hence, we will calculate the value of v_{rms} as follows.

               v_{rms} = \sqrt{\frac{3kT}{M}}

                            = \sqrt{\frac{3 \times 8.314 J/mol K \times 309.02 K}{0.031 kg/mol}}

                            = 498.5 m/s

Hence, v_{rms} for oxygen atom is 498.5 m/s.

For nitrogen atom, the molecular weight is 0.028 kg/mol. Hence, we will calculate its v_{rms} speed as follows.

                v_{rms} = \sqrt{\frac{3kT}{M}}

                              = \sqrt{\frac{3 \times 8.314 J/mol K \times 309.92 K}{0.028 kg/mol}}

                              = 524.5 m/s

Therefore, v_{rms} speed for nitrogen is 524.5 m/s.

3 0
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Which of the following most likely happens when the volume of a gas increases?
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the pressure of the gas increases

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Answer:

A

Explanation:

CH4+O2-CO2+ H20

that mean methane has burn in oxygen to produce CO2

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Please help! brainliest, rattings, thanks, etc.
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According to Newton's first law of motion, it takes an unbalanced force to move an object at rest.

I hope this helps :)

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3 years ago
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