Blank is radiant energy emitted from the sun.

natka813 [3]

Answer:

Pink- Lithium Salts or Lithium Nitrate (NO3), Yellow- Sodium Salts or Sodium Nitrate (NO3)

Explanation:

These chemicals (Sr, Ba, Cu, Ca, Na, Mg) are used because they create the colors for the firework. As you can see, the chemicals Nitrogen (N) and Oxygen (O) are combined with the color chemicals to make them combust.

The chart below explains the colorants used in firework creations:

Color= Compound

Red= strontium salts, lithium salts

lithium carbonate, Li2CO3 = red

strontium carbonate, SrCO3 = bright red

Orange= calcium salts

calcium chloride, CaCl2

calcium sulfate, CaSO4·xH2O, where x = 0,2,3,5

Gold= incandescence of iron (with carbon), charcoal, or lampblack

Yellow= sodium compounds

sodium nitrate, NaNO3

cryolite, Na3AlF6

Electric White= white-hot metal, such as magnesium or aluminum

barium oxide, BaO

Green= barium compounds + chlorine producer

barium chloride, BaCl+ = bright green

Blue= copper compounds + chlorine producer

copper acetoarsenite (Paris Green), Cu3As2O3Cu(C2H3O2)2 = blue

copper (I) chloride, CuCl = turquoise blue

Purple= mixture of strontium (red) and copper (blue) compounds

Silver= burning aluminum, titanium, or magnesium powder or flakes

I hope this answers the question you have! If not, I apologize.

8 0

3 years ago

The 1h nmr spectra corresponds to an alcohol with the molecular formula c5h12o. Deduce the structure from the spectra.

Sav [38]

Answer:

The question is incomplete. The spectra can be seen in the first picture in the attachment.

The molecule corresponds to the tert-amyl alcohol.

Explanation:

From the molecular formula, we can calculate the double bond equivalent, to know if there is any unsaturation in the molecule. For a compound of molecular formula CxHyOzXqNp

$DBE= (2x+2)- (y+q-p) ÷ 2$

DBE= (2.2+2)-12 ÷12 = 0

Therefore, the molecule does not have any unsaturation.

Considering the chemical shift values and the multiplicity, the structure that satisfies the spectra corresponds to the tert-amyl alcohol (structure in attachment).

7 0

3 years ago

Which pair of species have the most nearly

Anastaziya [24]

Since Electro Negativity will change their reactions the answer should be number 5. 12/6c and 13/6c. This is due to the fact that there is only one neutron difference between the two.

8 0

3 years ago

if I add 1.50 L of water to 250 mL of a 12.5 M NaOH solution, what will the molarity of the diluted solution be?

Fantom [35]

Answer:

The molarity of the diluted solution is 1.786 M

Explanation:

Dilution is a process in which you always start with a concentrated solution to which a greater volume of solvent is added. This modifies the concentration and volume of the resulting solution, but the amount of solute used to prepare the initial solution remains the same.

In summary, in a dilution the amount of solute does not vary, but the volume of the solvent varies: when more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

The following rule is fulfilled:

Vinicial x Cinicial = Vfinal x Cfinal

where:

Vinicial = Initial volume.
Cinicial = Initial concentration
Vfinal = Final volume
Cfinal = Final concentration

In this case:

Vinicial= 250 mL= 0.25 L (Being 1 L=1000 mL)
Cinicial= 12.5 M
Vfinal= 1.5 L+ 0.25 L=1.75 L
Cfinal= ?

Replacing:

0.25 L* 12.5 M= 1.75 L* Cfinal

Solving:

$Cfinal=\frac{0.25 L* 12.5 M}{1.75 L}$

Cfinal= 1.786 M

The molarity of the diluted solution is 1.786 M

4 0

3 years ago

Sunee mixes crushed ice into a glass of cold water. She puts the glass onto the kitchen counter. Then, she measures the temperat

ElenaW [278]

For the temperature to increase in Celsius

6 0

4 years ago