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OLga [1]
3 years ago
11

Which process is an example of a chemical change?

Chemistry
2 answers:
Alinara [238K]3 years ago
6 0

Answer:

d- activating a glow stick

Explanation:

Glow sticks produce light through a chemical reaction.

Ilia_Sergeevich [38]3 years ago
5 0

Answer:

burning of paper

melting of lead

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The concept that all matter is made of tiny particles in constant motion is called?
Svet_ta [14]

Answer:

kinetic theory

Explanation:

The concept that all matter is made of tiny particles in constant motion is called the Kinetic Theory

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3 years ago
Hydrogen sulfide gas reacts with oxygen to produce sulfur dioxide gas and water according to the balance equation:
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2 mol of H2S react with 3 mol of O2

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7 0
3 years ago
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Analiza a que se debe el cambio de color del papel tornasol rosa en presencia de un ácido.​
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El cambio ocurre a causa de que los iones reaccionan y producen un cambio en la disposición de los átomos que se encuentran presentes en el indicador.

5 0
3 years ago
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A 519.93 gram sample of N2O is in a 7.05 L container. What is the pressure of the gas in atmospheres when the temperature is 125
Brut [27]

Answer:

17.27 atm

Explanation:

Use the ideal gas law or PV = nRT

We are solving for pressure here so lets isolate for P before we plug in values:

P = \frac{nRT}{V}

So first to get n or the number of moles we need to convert the grams of N2O to moles of N2O. We can do this by multiplying by the inverse of the molar mass like so:

\frac{519.93g(N2O)}{1} \frac{mol}{44.013g(N2O)}

Our grams of N2O would cancel and give us 11.813 mol of N2O

Now all thats left is to plug in and solve with the correct value for R which in this case for all of our units to cancel is 0.08206

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(I would double check the calculator work if it is for correctness just be sure)

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3 years ago
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