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True [87]
3 years ago
9

(This question was deleted last month)

Chemistry
1 answer:
4vir4ik [10]3 years ago
6 0

Answer: Fireworks exploding is a chemical change.

Explanation: Lighting gunpowder, and making the explosion is a chemical change.

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White raven [17]

Answer:

237/93 np

Explanation:

sub to tkwick

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3 years ago
In the chemical equation below, name the reactant(s) and product(s).
Olenka [21]

Answer:Methane(CH4) and dioxygen(O2) are the reactants

Carbon dioxide(CO2) and water(H2O) are the products

Explanation:

4 0
2 years ago
How many mg of O2 will react with the TNT?
Tanzania [10]
 TNT has the molecular formula: C7H5N3O6. And hence, when reacted in oxygen gas, you get what is known as <span>combustion</span> reaction. the reaction is: <span><span>C7</span><span>H5</span><span>N3</span><span>O6</span>+<span>O2</span>→C<span>O2</span>+<span>N2</span>+<span>H2</span><span>O</span></span>
6 0
3 years ago
A full bottle of water was left outside overnight in freezing temperatures, causing the bottle to crack. No mass was added or re
kodGreya [7K]

Answer:The correct answer is option C.

Explanation;

Water has unique property that is, it expands on freezing.Which is the reason for less density of ice than water. The cracking of the bottle was due to the expansion of water (present inside the bottle) on freezing.

Generally, density is inversely proportional to the volume of the substance.

Density=\frac{Mass}{Volume}

Density\propto \frac{1}{Volume}

As we know ,that water expands on freezing which means that volume increases. And with increase in volume of density decreases.

Hence, the correct answer is option C.

6 0
3 years ago
How can cool red giant be more luminous than a warmer main sequence star?
ruslelena [56]

Answer: C

Explanation:

5 0
3 years ago
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