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melomori [17]
3 years ago
12

How are fireworks made ?

Chemistry
1 answer:
Nadusha1986 [10]3 years ago
4 0
Aerial fireworks are usually manufactured as a shell that is made up of four parts. The container consists of pasted paper. The fuse allows the shell to reach the desired altitude before exploding. A bursting charge made of black powder (like a firecracker) is at the center of the shell.

You might be interested in
Calculate ΔH (in kJ) for the process Hg2Br2(s) → 2 Hg(l) + Br2(l) from the following information.
Ilia_Sergeevich [38]

Answer : The enthalpy change of reaction is 206.9 kJ

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The given final reaction is,

Hg_2Br_2(s)\rightarrow 2Hg(l)+Br_2(l)    \Delta H=?

The intermediate balanced chemical reaction will be,

(1) Hg(l)+Br_2(l)\rightarrow HgBr_2(s)    \Delta H^o_1=-170.7kJ

(2) Hg(l)+HgBr_2(s)\rightarrow Hg_2Br_2(s)    \Delta H^o_2=-36.2kJ

First we will reverse the reaction 1 and 2 then adding both the equation, we get :

(1) HgBr_2(s)\rightarrow Hg(l)+Br_2(l)    \Delta H^o_1=+170.7kJ

(2) Hg_2Br_2(s)\rightarrow Hg(l)+HgBr_2(s)    \Delta H^o_2=+36.2kJ

The expression for final enthalpy is,

\Delta H=\Delta H^o_1+\Delta H^o_2

\Delta H=(+170.7kJ)+(+36.2kJ)

\Delta H=206.9kJ

Therefore, the enthalpy change of reaction is 206.9 kJ

8 0
2 years ago
Read 2 more answers
How does the frogs vestigial thumb help survival?
Stella [2.4K]
to help create food establishment.
5 0
2 years ago
Relative to protons, electrons have:
saw5 [17]

Answer:

<u><em>(B.) a significantly lower mass that protons</em></u>

Explanation:

The mass (in g) of an electron is 9.11 ×10^{-28}g, which is significantly lower than the mass of protons and neutrons which are approximately the same. They are extremely small (equal to 0 amu), contributing nothing to the overall mass of the atom.

The nucleus has a mass of 1 amu and is positively charged.

6 0
3 years ago
Which chemical equation is unbalanced? c o2 right arrow. co2 sr o2 right arrow. 2sro 6h2 3o2 right arrow. 6h2o h2 h2 o2 right ar
netineya [11]

The unbalanced equation is one in which the moles of atoms are not equal on both sides of the reaction.

<h3>What is a balanced chemical equation?</h3>

A balanced chemical equation is one in wgich the moles of atoms in the reactants side is equal to the moles of atoms on the product side.

The given equations of reaction is not clearly stated.

Therefore, the unbalanced equation is one in which the moles of atoms are not equal on both sides of the reaction.

Learn more about balanced equations at: brainly.com/question/11904811

#SPJ4

6 0
2 years ago
Give the major force between acetone and chloroform.
EleoNora [17]
Says here the answer is <span>dipole-dipole</span>
4 0
3 years ago
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