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n200080 [17]
4 years ago
14

Classify the following as an element, compound, homogeneous mixture, or heterogeneous

Chemistry
1 answer:
Archy [21]4 years ago
3 0
The answer is D. Heterogeneous mixture
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How do you measure moles
wlad13 [49]

Answer:

Answers may vary

Explanation:

Mol is the amount of molecules in something. Mol are similar to donuts, if you have a dozen of something you have 12 of them. If you have a mol of Hydrogen gas you 6.02•10^23 molecules of Hydrogen gas. If you are taking a chemistry class you will probably receive questions involving converting grams to mol and vice versa.

Converting Grams to Mol:

grams of x•(1/molecular mass of x)

note: you can find molecular mass of x by looking at the masses of the elements you need to add up in the periodic table

Converting Mol to Grams:

mol of x•(molecular mass of x)

6 0
3 years ago
Read 2 more answers
What is an absorption spectrum?
Natasha2012 [34]
Answer: option A. the colors absorbed when an element gains energy.

Justification:

The electromagnetic waves, visible light included, consists of a gamma of waves with different frequencies and wavelengths.

The visible light can be decomposed in a set of series of lines of light with different frequencies and that decomposition is what a spectrum of light is. Each series correspond to a color.


The atoms can absorb and emit photons. That is, atoms can absorb and release energy.

When the atom abosorbs a photon an electron gets excited ( the electron gains energy).

The light absorbed, then, corresponds to color absortion, and the spectrum of absortion is the colors absorbed by the atom when its electrons gain energy by the absortion of photons (light).
5 0
3 years ago
How many significant digits are in 2804
docker41 [41]

Answer:

4 significant digits

Explanation:

Zeroes placed between other digits are always significant

4 0
3 years ago
What is the oxidation state of each individual carbon atom in c2o42−?
MA_775_DIABLO [31]

Answer:

+3

Explanation:

The oxygen all have a -2 oxidation state. (peroxides are exceptions)

The chemical structure is symmetrical. Both carbon are equivalent.

2 (oxidation state of carbon) + 4 (oxidation state of oxygen) = charge of ion.

2 (oxidation state of carbon) + 4 (-2) = -2

oxidation state of carbon = +3

7 0
3 years ago
Read 2 more answers
PLS HELP I GIVE BRANLIEST !!!
yarga [219]

Explanation:

D. The total mass of the reactants equals the total mass of the

products.

6 0
3 years ago
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