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scZoUnD [109]
3 years ago
6

What gives the color and shape characteristics to flames in a fire?

Chemistry
1 answer:
zalisa [80]3 years ago
8 0

Answer:

Different ions of different elements (usually metals) make a flame burn with a characteristic color when introduced into the reaction zone; the different colors are caused by the different quantized energy levels of the electrons in the different atoms.

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What mass of ether will be produced is 221 g of ethanol reacts with a 66 percent yield?
Keith_Richards [23]
@pandamille help her please!!!!
5 0
3 years ago
If two objects have the same density, they must have the same
Radda [10]

Answer:

no ,its not necessary tht two objects have same volume have the same mass because the density of the material they are made up of can be different. mass and volume areindependent, two objects with thesame volume can have differentmasses. Therefore, the objects can have different densities.

7 0
3 years ago
Chromatography and fractional distillation can be used to separate compounds.
Finger [1]

Answer:

fractionao distillation of two colourless liquids

3 0
2 years ago
The pka of hco3 - (or pka2 of h2co3) is 10.33. what is the ph of a solution that has 0.1 m na2co3 and 1.0 m nahco3?
Margarita [4]

The given solution is a mixture of NaHCO_{3}and Na_{2}CO_{3}. It acts as a buffer as it is a combination of the weak acid HCO_{3}^{-}and it's conjugate base CO_{3}^{2-}.

[Acid] = [HCO_{3}^{-}]=1.0 M

[Base] =[CO_{3}^{2-}]=0.1 M

pH of the buffer solution can be calculated from Hendersen-Hasselbalch equation as below:

pH=pK_{a}+log\frac{[CO_{3}^{2-}]}{[HCO_{3}^{-}]}

pH=10.33+log\frac{0.1}{1.0}

pH = 10.33+(-1)

     = 9.33


4 0
3 years ago
How many Fe atoms are within a single FeCl2 molecule
Rama09 [41]

The number of Fe atoms within a single FeCl2 molecule are one.

Explanation:

Metallic iron produces only ferrous chloride (FeCl2) on treatment with hydrochloric acid. Hydrogen gas is also liberated as the other product. But when iron is heated with chlorine gas, ferric chloride (FeCl3) is formed.

Total number of atoms within a single FeCl2 molecule are 3 atoms.

The number of Fe atoms in FeCl2 molecule are one.

Number of Cl atoms in FeCl2 molecule are two.

6 0
3 years ago
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