Can someone tell me plz :P

Is neon element a metal nonmetal or metalloid

avanturin [10]

Nonmetal your welcome

7 0

3 years ago

1- What do greenhouse gases do in our atmosphere? a. They absorb radiation given off by the Earth b They block harmful radiation

zavuch27 [327]

Answer: A. They absorb radiation given off by the earth.

Explanation: Green house gases are gases that have the capability of trapping the heat energy from the sun in our environment. These special attribute of these gases is what keeps our environment warm and sustain life as we know it. Example of Green House Gases include: carbon dioxide, water vapour and methane.

8 0

4 years ago

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PLEASE HELP WILL GIVE BRAINLYIST TO FIRST PERSON

kolezko [41]

Answer:

1) Weak base.

2) Weak acid.

Explanation:

1) Which would have a lower pH, a 0.1 M solution of a strong base or a weak base? Why?

For bases:

Solution with lower pH means that the solution has a lower basic character.

While solution with higher pH means that the solution has a higher basic character.

When we have a 0.1 M solution of a strong base or a weak base, the weak base will have a lower pH because it is not completely dissociated to produce OH⁻ ions.

While, strong base dissociates completely to produce OH⁻ ions, so it will has higher basic character and thus has a higher pH value.

So, weak base will have the lower pH value.

2) Which would have a higher pH, a 0.1 M solution of a strong acid, or a weak acid? Why?

For Acids:

Solution with lower pH means that the solution has a higher acidic character.

While solution with higher pH means that the solution has a lower acidic character.

When we have a 0.1 M solution of a strong acid or a weak acid, the weak acid will have a higher pH because it is not completely dissociated to produce H⁺ ions, so it has a lower acidic character.

While, strong acid dissociates completely to produce H⁺ ions, so it will has higher acidic character and thus has a lower pH value.

So, weak acid will have the higher pH value.

5 0

3 years ago

Many microorganisms are beneficial in different ways. Which one these is NOT an example of a beneficial microorganism? A) bacter

kolbaska11 [484]

C) virus i hope this helps

7 0

3 years ago

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A high school student acquired an emission spectrum of an unknown sample. He knew the unknown sample contained one of the elemen

pickupchik [31]

a. The unknown sample contained the element C.

An electromagnetic spectrum shows the electromagnetic radiation that emits (emission spectrum) or absorbs (absorption spectrum) a substance. Each spectrum is unique so its radiation can be used to identify a substance in a manner analogous to a fingerprint. Thus, when observing the spectra given for elements A, B and C, we observe that spectrum for element C is the only one that has an emission band at 610 nm but not at 480 nm, so the unknown sample corresponds to element C.

b. The 670 nm line represents a lower transition energy than an emission line at 428 nm.

The transition energy is the energy required for an electron in the sample to pass from one quantum state to another. In an emission spectrum energy is supplied to the molecules to excite them, favoring that electronic transition and measuring the energy in the form of light they emit when they relax from the quantum state to which they were excited to the fundamental or basal state in which they were initially.

This transition energy is related to the wavelength of the radiation emitted according to the following equation, which corresponds to the equation for the energy of a photon,

E = hc / λ

where E is the transition energy or the energy of the emitted photons, h is the Planck constant (6,626x10-34 J s), c is the speed of light in vacuum (3x10 8 J / s) and λ the photon's wavelength.

According to the given equation, we see that the energy of the photons changes inversely proportional to the wavelength λ. In this way,

607nm > 428 nm

Then for the transition energies corresponding to these wavelengths,

E (670 nm) < E (428nm)

So 670 nm line represents a lower transition energy than an emission line at 428 nm.

8 0

3 years ago