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MrRa [10]
4 years ago
12

Describe the ways you can know that a chemical reaction has occurred.

Chemistry
2 answers:
Bad White [126]4 years ago
8 0
Signs that a chemical reaction is occurring are: 1. change in color 2. change in odor 3. change in pH, as in changes from acid to base or base to acid
Pachacha [2.7K]4 years ago
6 0

The color can change  so can the PH  and oder.

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For the reaction below, the enthalpy change is ΔH = –566 kJ/mol. Increasing the temperature of the system will cause which of th
Lapatulllka [165]

Answer:

The partial pressure of CO₂ will decrease.

Explanation:

The reaction:

2CO (g) + O₂ (g) ⇄ 2CO₂ (g) has a ΔH = –566 kJ/mol. As ΔH<0, the reaction is exothermic.

Le Chatelier's principle says that if a system in chemical equilibrium is subjected to a disturbance it tends to change in a way that opposes this disturbance.

In this case, with increasing of the temperature, the system will produce less heat, doing the equilibrium shifts to the left.

Thus, the partial pressure of both CO and O₂ will increase. And<em> partial pressure of CO₂ will decrease.</em>

I hope it helps!

4 0
3 years ago
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In one of his experiments, Lavoisier placed 10.0 grams of mercury (II) oxide into a sealed container and heated it. The mercury
inysia [295]

Oxygen gas produced : 0.7 g

<h3>Further explanation</h3>

Given

10.0 grams HgO

9.3 grams Hg

Required

Oxygen gas produced

Solution

Reaction⇒Decomposition

2HgO(s)⇒2Hg(l)+O₂(g)

Conservation of mass applies to a closed system, where the masses before and after the reaction are the same

mass of reactants = mass of products

mass  HgO = mass Hg + mass O₂

10 g = 9.3 g + mass O₂

mass O₂ = 0.7 g

4 0
3 years ago
Which of the following cannot be broken down into different elements?
belka [17]
Atoms. Well, they can be broken down, but that won't happen that fast.
7 0
3 years ago
Describe the processes of photosynthesis and cellular respiration, including the raw materials (reactants) and products. Explain
n200080 [17]

Answer the glucose is then turned back into carbon dioxide, which is used in photosynthesis

Explanation: :)

3 0
3 years ago
Mr. Adams asked his students to write the chemical symbols for the element zinc. He wrote the student's answers on the whiteboar
Romashka [77]
The chemical symbol for zinc is Zn.
3 0
3 years ago
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