Which term is testable, a prediction, and can be supported or refuted by data?

Chemistry

1 answer:

devlian [24]3 years ago

3 0

A theory fits all three of these descriptions. you can test, predict, and prove or disprove a theory. hope this helps!

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The heat of reaction for the combustion of propane is –2,045 kJ. This reaction is: C3H8(g) +502 (g) 3CO2 (g) + 4H2O (g). Determi

Ede4ka [16]

Answer:

$\Delta _fH_{C_3H_8}=-102.7kJ/mol$

Explanation:

Hello,

In this case, we can consider that the given heat of combustion is indeed the heat of reaction since it corresponds to the combustion of propane, which is computed by using the heat formation of all the involved species as shown below:

$\Delta _cH=3*\Delta _fH_{CO_2}+4*\Delta _fH_{H_2O}-\Delta _fH_{C_3H_8}-5*\Delta _fH_{O_2}$

Thus, since the heat of formation of gaseous carbon dioxide is -393.5 kJ/mol, water -241.8 kJ/mol and oxygen 0 kJ/mol, the heat of formation of propane is:

$\Delta _fH_{C_3H_8}=3*\Delta _fH_{CO_2}+4*\Delta _fH_{H_2O}-5*\Delta _fH_{O_2}-\Delta _cH\\\\\Delta _fH_{C_3H_8}=3*(-393.5)+4*(-241.8)-5*0-(-2045)\\\\\Delta _fH_{C_3H_8}=-102.7kJ/mol$

Best regards.

8 0

3 years ago

What is the name of a mixture that is easily seen and separated???

DedPeter [7]

Answer:

suspension

Explanation:

a mixture in which particles can be seen and easily separated by settling or filtration.

hope this helps

4 0

2 years ago

Read 2 more answers

The atomic mass unit is presently based on assigning an exact integral mass (in amu) to an isotope of ________.

MAVERICK [17]

The atomic mass unit is presently based on assigning an exact integral mass (in amu) to an isotope of carbon.

<h3>What is the atomic mass?</h3>

The atomic mass is a measurement used in physics and chemistry to denote the average atomic mass of a given element which is measured in the atomic mass unit or amu.

In conclusion, the atomic mass unit is presently based on assigning an exact integral mass (in amu) to an isotope of carbon.

Learn more about the atomic mass here:

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8 0

2 years ago

Consider the chemical equations shown here.

Alona [7]

Answer:

-304.1

Explanation:

Just took it on Edge 2020