in the nuclues
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Explanation:
Number of moles consisting in a liter of solution is known as molarity.
Mathematically, Molarity = \frac{\text{no. of moles}}{\text{Volume in one liter}}[/tex]
It is given that volume is 10 liter and there is 5.0 moles of solute. Hence, we will calculate the molarity as follows.
Molarity =
=
= 0.5 mol/L
Thus, we can conclude that molarity of the given solution is 0.5 mol/L.
Answer : The correct option is, 318.1 J
Solution :
The given chemical reaction will be,
In this reaction, X and Y are the reactants and W and Z are the products.
As we know that the energy remains conserved during the chemical reaction.
So,
Sum of energy of product = Sum of energy of reactant
Therefore, the amount of chemical energy of product Z contain will be, 318.1 J
Answer:
318.1 J
Explanation:
The reaction given is:
X + Y → W + Z
The chemical energy of the reaction (ΔU), is the variation of the chemical energy, so is the chemical energy of the products (UW and UZ) less the chemical energy of the reactants (UX and UY).
If the reaction loses the chemical energy, it must be negative, and the chemical energy that a substance contains, is positive.
ΔU = (UW + UZ) - (UX + UY)
-111.6 = (41.9 + UZ) - (199.3 +272.3)
-111.6 = 41.9 + UZ - 471.6
- UZ = - 429.27 + 111.6
-UZ = - 318.1
UZ = 318.1 J
Answer:
The colors are produced by heating metal salts, such as calcium chloride or sodium nitrate, that emit characteristic colors. List of colors and elements in Fireworks: Aluminum – Aluminum is used to produce silver and white flames and sparks.
Colors in fireworks are produced by heating certain chemicals until they emit light, creating an emission spectrum. Different chemicals create different colors; for example, sodium compunds create yellow, while lithium creates crimson.
Chemicals are used to produce colors in fireworks by being heated until they are excited and emit light. This produces an emission spectrum which varies based on the element being heated. Sodium and its compounds, for example, produce a bright yellow color. This effect is seen when an electrical discharge is passed through sodium vapor. Lithium, on the other hand, creates a bright, crimson color.
Other alkali metals and their salts also add color to a flame. Even certain alkaline earth metals such as calcium, strontium, and barium give color to a flame giving shades of red and green. In certain specific engines, green and yellow flames are produced using different types of fuel and oxidant mixtures.
Thus, the specific chemicals used and how they're mixed and ignited play a critical role in the color of the resulting fireworks display.
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