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pav-90 [236]
3 years ago
11

The equation, 2 H2(g) + O2(g) Imported Asset 2 H2O(l), represents an equation for a standard formation reaction.

Chemistry
2 answers:
disa [49]3 years ago
6 0

Answer : The given statement is false.

Explanation :

The given chemical reaction of formation of H_2O is:

2H_2(g)+O_2(g)\rightarrow 2H_2O(l)

Standard formation reaction :

In the standard formation reaction, one mole of substance always produced from its element that are present in their standard states.

Thus, the standard formation reaction of H_2O will be:

H_2(g)+\frac{1}{2}O_2(g)\rightarrow H_2O(l)

Hence, the given statement is false.

VLD [36.1K]3 years ago
5 0
If this is asking if the equation is balanced, than the answer is true
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I would say when an atom has its valence electron shell filled like a noble gas has, it is not easily changed.

I’m not entirely sure of what you’re asking, but if you’re talking about bonding then it would be an ionic bond that is not easily changed.
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What is an investigation that is controlled
Ivan
A controlled investigation is a experiment that is set for example the same rule for everything
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A catalyst is:
icang [17]
A catalyst is a substance that increases the rate of a chemical reaction without itself being consumed . (ans: second choice)
7 0
2 years ago
Read 2 more answers
When 1.045 g of CaO is added to 50.0 mL of water at 25.0 °C in a calorimeter, the temperature of the water increases to 32.3 °C.
Rus_ich [418]

Answer:

1.71 kJ/mol

Explanation:

The expression for the calculation of the enthalpy change of a process is shown below as:-

\Delta H=m\times C\times \Delta T

Where,  

\Delta H  is the enthalpy change

m is the mass

C is the specific heat capacity

\Delta T  is the temperature change

Thus, given that:-

Mass of CaO = 1.045 g

Specific heat = 4.18 J/g°C

\Delta T=32.3-25.0\ ^0C=7.3\ ^0C

So,  

\Delta H=1.045\times 4.18\times 7.3\ J=31.88713\ J

Also, 1 J = 0.001 kJ

So,  

\Delta H=0.03189\ kJ

Also, Molar mass of CaO = 56.0774 g/mol

Moles=\frac{Mass}{Molar\ mass}=\frac{1.045}{56.0774}\ mol=0.01863\ mol

Thus, Enthalpy change in kJ/mol is:-

\Delta H=\frac{0.03189}{0.01863}\ kJ/mol=1.71\ kJ/mol

8 0
3 years ago
Changes in the composition of the atmosphere have caused gradual changes in earth's _______ throughout history, causing changes
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climate

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heat

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  • The temperature close to the surface rises as a result of this heat being trapped in the atmosphere.
<h3>UV light:</h3>
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  • These influences are probably going to persist in the future.
<h3>climate:</h3>
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To learn more about the changes in earth visit:

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6 0
1 year ago
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