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notsponge [240]
3 years ago
15

Which is an element? A: H20 B: NaCl C: Mg D: CO

Chemistry
2 answers:
xz_007 [3.2K]3 years ago
4 0
D is the answer. The others are compounds not single elements
Talja [164]3 years ago
3 0
The answer is option D "CO." Co also known as Cobalt is the 27th element on the periotic table. It was discovered in <span>1735, it's boiling point is 3200 k.</span>

Atomic mass: 58.9332
Protons: 27
Neutrons: 32
Electrons: 27

Hope this helps!

You might be interested in
The only way to convert between two substances is to use a _____ to _____ conversion.
kykrilka [37]

Mole to Mole.

Assuming you're referring to converting in general, there must always be a mole to mole conversion.

Gram to gram would be incorrect as you must have a molar conversion in order to do so.

Gram to mole would be incorrect because that would leave out molecular conversions which would require three steps rather than two.

Mole to molecule is incorrect as it leaves out grams, depending on the circumstances and equation provided.

Thus, through process of elimination, mole to mole is the correct answer.

Hope this helps!

4 0
3 years ago
I would like to know the meaning of the electrostatics? if someone knew please tell me
Andreyy89
Electrostatics is <span> a branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges. :)     Hope this helps                                                   </span>
6 0
3 years ago
Air thermals are updrafts of warm air that rise from
Anastaziya [24]

Answer:

B. convection because warm air rises and cool air sinks.

Explanation:

The processes that enables birds to fly to higher altitudes without flapping their winds while riding air thermals is called convection.

Convection is one of the forms of heat transfer usually found in gases and liquids.

  • In convection density differences due to temperature changes causes the circulation.
  • Warm air is less dense and it is hotter.
  • It rises up from the surface where it is warmed
  • Cold air sinks to replace the warm air. Cold air form when the air loses its energy to the surrounding.
  • By virtue of this, birds are able to take advantage of it for their flight.
7 0
3 years ago
What evidence caused bohr to change rutherfords nuclear model into the solar system model
Mashutka [201]

Both noticed that different atoms gives different colours of light when they are exposed to flame.

3 0
3 years ago
a chemical spill gets into the soil and effects the plants within a forested ecosystem. explain why the top predators would be m
notka56 [123]
Well if we think about a food pyramid there are consumers that eat plants and if there are no plants to eat then those primary consumers die. Which means that the secondary consumers have no prey to eat and die as well, eventually leading to the top predators who have absolutely nothing to feed on.
They are the most affected because energy level decreases the higher up you go so the top predators need to eat more and if there is less and less to eat they die out quicker
3 0
3 years ago
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