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Marizza181 [45]
3 years ago
15

As the movement of molecules within a substance increases, describe the change in heat of the substance. Justify your response i

n two or more complete sentences.
Chemistry
2 answers:
RSB [31]3 years ago
6 0

As the movement of molecules within a substance increases, the heat of the substance will also increase, as the molecules are vibrating more and so thermal energy will be passed between the molecules at an increased rate.

Vladimir [108]3 years ago
3 0
It will get hotter, because the molecules create heat when they move around just like us when we run.
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A property is a characteristic of a substance that can be observed and does not change the identity of the substance. T/F
Murljashka [212]
The correct answer is false. The statement given does not describe a property in general. However, it speaks of a specific type of property which is the physical property.  This property is the one that does not change the identity of a substance. A property can also be a chemical property where the identity of a substance is changed.
4 0
3 years ago
Why does random error affects precision?​
djyliett [7]

Answer:

Thus, random error primarily affects precision. Typically, random error affects the last significant digit of a measurement. The main reasons for random error are limitations of instruments, environmental factors, and slight variations in procedure.

Explanation:

3 0
3 years ago
Use the ideas of the Kinetic Theory to explain the following. A sealed container contains nitrogen gas. The pressure of a gas is
zubka84 [21]

<u>Answer:</u>

When the temperature increases, the molecules of the gas gain energy. Therefore, they move faster.

This causes the molecules to hit the walls of the container more frequently and with greater force. Hence the pressure inside the container increases.

6 0
2 years ago
An irregularly shaped piece of magnesium with a mass of 11.81 g was dropped into a graduated cylinder partially filled with wate
dlinn [17]

Answer:

The answer is

<h2>1.74 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question

mass of magnesium = 11.81 g

volume = 6.80 mL

The density of the metal is

density =  \frac{11.81}{6.80}  \\  = 1.73676470...

We have the final answer as

<h3>1.74 g/mL</h3>

Hope this helps you

7 0
4 years ago
Standard Thermodynamic Quantities for Selected Substances at 25 ∘C Reactant or product ΔHf∘(kJ/mol) Al(s) 0.0 MnO2(s) −520.0 Al2
Svet_ta [14]

Answer:

-1815.4 kJ/mol

Explanation:

Starting with standard enthalpies of formation you can calculate the standard enthalpy for the reaction doing this simple calculation:

∑ n *ΔH formation (products) - ∑ n *ΔH formation (reagents)

This is possible because enthalpy is state function meaning it only deppends on the initial and final state of the system (That's why is also possible to "mix" reactions with Hess Law to determine the enthalpy of a new reaction). Also the enthalpy of formation is the heat required to form the compound from pure elements, then products are just atoms of reagents organized in a different form.

In this case:

ΔH rxn = [(2 * -1675.7) - (3 * -520.0)] kJ/mol = -1815.4 kJ/mol

4 0
3 years ago
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