Which of the following is the correct definition of minerals? A a naturally occurring, inorganic solid that has a crystal shape and a definite chemical composition B a naturally occurring, inorganic solid that forms through crystallization of melted materials C a naturally occurring, organic solid that forms through crystallization of materials dissolving in water D a naturally occurring, organic solid that has a crystal shape and a definite chemical composition

Answers

Answer 1

Answer: "A a naturally occurring, inorganic solid that has a crystal shape and a definite chemical composition" is the one among the following choices given in the question that is the correct definition of minerals. The correct option among all the options that are given in the question is the first option. I hope it helps you.

Answer 2

Answer:

Answer: a

Explanation: a naturally occurring, inorganic solid that has a crystal shape and a definite chemical composition" is the one among the following choices given in the question that is the correct definition of minerals. The correct option among all the options that are given in the question is the first option. I hope it helps you.

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What period is Pb in

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Pb (lead) is in the 6th period

(please give brainliest if this helped you)

How could you tell if a sample of matter is a element

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Terms of good sample

In general, a good sample is which can represent as much as possible the characteristics of the population. In the language of measurement, meaning that the sample must be valid, which can measure something that should be measured. A valid sample is determined by two considerations.

First: The accuracy or precision, the degree of absence of "bias" (error) in the sample. In other words, the less the error rate is in the sample, the more accurate the sample. Benchmarks for "bias" or error is population.

Cooper and Emory (1995) states that "there is no systematic variance"that means is there is no diversity of measurement due to the influenceof known or unknown, which led to scores tend to lead to a certainpoint.

Second: Precision. The second criterion is to have a good sample estimate of the level of precision. Precision refers to the question of how close we are to estimate population characteristics. There has never been a sample that can fully represent the characteristics of the population. Therefore,in each sampling always attached keasalahan-error, which is known as"sampling error" Precision is measured by standard deviation (standarderror). Thesmaller the difference between the standard deviation obtained from thesample (S) with a standard deviation of the population (s), the higherthe level of precision. Thoughnot always, the level of precision may be increased by adding thenumber of samples, the fault may be reduced if the number of samplesplus (Kerlinger, 1973).

How are electromagnetic waves affected as the frequency of the waves increases?A) energy and wavelength increase
B) energy and wavelength decrease
C) energy decreases, wavelength increases
D) energy increases, wavelength decreases

Answers

When the frequency of the waves increases, its energy increases, while the wavelength decreases.

• A travelling disturbance, which mediates energy from one place to another is known as a wave.

• The tendency to do work or cause a change is known as the energy.

• Waves can be determined with the help of frequency and wavelength.

• In a given unit of time, the number of complete wavelengths is known as frequency.

• With the increase of the size of wavelengths, its energy and frequencydecreases.

• There are two basic kind of waves, that is, electromagnetic and mechanical waves.

• The waves, which can travel through a medium or a vacuum is known as the electromagnetic waves.

• The waves with long wavelengths comprise less energy than waves with short wavelengths.

Thus, correct answer is option d, that is, energy increases, wavelength decreases.

To know more about:

brainly.com/question/21043141

As the frequency is how many waves pass a fixed point in certain amount of times. This means that the waves get closer together and, therefore, the wavelength decreases. It also means that the wave has more energy.

Answer: D) Energy increases, wavelength decreases

What happens when red lead oxide is heated?

Answers

when red leadoxide is heated it gives lead and oxygen i think.

How is Earth like a magnet

Answers

Earth's magnetic field is mostly caused by electric currents in the liquid outer core, which is composed of conductive, molten iron. Loops of currents in the constantly moving, liquid iron create magnetic fields. From afar, the Earth looks like a big magnet with a north and south pole like any other magnet.

Find the ΔH for the reaction below, given the following reactions and subsequent ΔH values: PCl5(g) → PCl3(g) + Cl2(g) P4(s) + 6Cl2(g) → 4PCl3(g) ΔH = -2439 kJ
4PCl5(g) → P4(s) + 10Cl 2(g) ΔH = 3438 kJ

Answers

The value of ΔH will be 249.75 KJ.

To obtain the reaction :

PCl5(g) → PCl3(g) + Cl2(g)

We have to add the given reactions and then divide it by 4.

(i) adding the reactions

P4(s) + 6Cl2(g) → 4PCl3(g) ΔH = -2439 kJ

4PCl5(g) → P4(s) + 10Cl 2(g) ΔH = 3438 kJ

we get:

4PCl5(g) → 4PCl3(g) + 4Cl2(g), ΔH = 3438 - 2439

(ii) dviding by 4

PCl5(g) → PCl3(g) + Cl2(g) , ΔH = (3438 - 2439)/4

ΔH = 249.75 kJ is the required enthapy.

Learn more about enthalpy:

brainly.com/question/12676996

Answer:

The value of $\Delta H$ for the desired reaction will be 249.75 KJ.

Explanation:

The desired reaction is shown below

$\textrm{PCl}_(5)\left ( g \right )\rightarrow \textrm{PCl}_(3)\left ( g \right )+\textrm{Cl}_(2)\left ( g \right )$

The desired reaction can be obtained by adding the given reactions and then dividing both sides by 4.

$P_(4)\left ( s \right )+6Cl_(2)\left ( g \right )\rightarrow 4PCl_(3)\left ( g \right ) \n4PCl_(5)\left ( g \right )\rightarrow P_(4)\left ( s \right )+10Cl_(2)\left ( g \right )$

Net Enthalpy change for the desired reaction

$\displaystyle (3438-2439)/(4) \textrm{ KJ} = 249.75 \textrm{ KJ}$

$\Delta H = 249.75 \textrm{ KJ}$

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