What is the correct electron-dot formula for Sulfur?

The mass of 50,000 molecules of methane is 1.35 × 10⁻¹⁸ gram.

To find the mass of 50,000 molecules of methane, we need to multiply the mass of one methane molecule by the number of molecules.

Given:

Mass of one methane molecule = 2.7 × 10⁻²³ gram

Number of methane molecules = 50,000

To calculate the mass of 50,000 molecules of methane, we can use the following equation:

Mass = (Mass of one molecule) × (Number of molecules)

Mass = (2.7 × 10⁻²³ gram) × (50,000)

Now, let's calculate the mass:

Mass = 2.7 × 10⁻²³ × 50,000

Mass = 1.35 × 10⁻¹⁸ gram

Therefore, the mass of 50,000 molecules of methane is 1.35 × 10⁻¹⁸ gram.

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Answer:

b

Explanation:

. B. atoms of the elements hydrogen and oxygen are in the reactants and also in the productsatoms of the elements

Gas bubbles appear after a chemical reaction has occurred

Chemical changes occur when a substance combines with another to form a new substance. Chemical changes occur through the process of chemical reactions. The formation of a gas is the sign that a reaction may have occurred. Gas bubbles appear after a chemical reaction has occurred.

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Answer: The Law of Conservation of Mass

In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.

In a chemical reaction, mass can neither be created nor be destroyed.

The answer is most likely D

Answer:

well to me it is called natural energy

Answer:

6.098M

Explanation:

akording to m1v1/m2v2=n1/n2

Answer:

electric charge

Explanation:

Electric charge is a physical property of matter that imparts a force on charged matter when placed in an electromagnetic field. Charge can be positive or negative (typically carried by protons and electrons, respectively). Similar charges repel and dissimilar charges attract.

Answer:Electric Charge I hope this helpful

Explanation:

Electric Charge. Electrical property of matter that creates electric/magnetic forces and interactions.Electric charge is a physical property of particles or objects that causes them to attract or repel each other without touching. All electric charge is based on the protons and electrons in atoms. A proton has a positive electric charge, and an electron has a negative electric charge.

Answer:

15.1 grams

Explanation:

Answer:

I did some research and found some things here, its another sight sort of like brainly.  Hopefully this helps!

Explanation:

https://socratic.org/questions/how-many-grams-of-potassium-chloride-are-produced-if-25-0g-of-potassium-chlorate

Answer:

cold

Explanation:

ice is a liquid which is water

After a helium flash, which occurs in the core of a star during the later stages of its evolution, the star enters a stable phase of helium burning. During the flash, helium ignites explosively, producing a burst of energy that causes the core to expand and cool.

However, once the temperature and pressure in the core have reached the required levels again, helium burning resumes, producing energy and keeping the star stable. This process continues until the star exhausts its helium fuel, at which point it may undergo further nuclear reactions or collapse, depending on its mass. The helium flash is a crucial stage in the evolution of low- to medium-mass stars, allowing them to continue burning and shining for billions of years.

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Answer:

atomic mass = 16 amu

Explanation:

The atomic mass is the total protons and neutrons in an element. The atomic number represents the total number of protons.

In this form, the superscript (raised exponent) represents the mass number/atomic mass. The subscript represents the atomic number. Therefore, if the number (16) is the superscript, this must be your answer.

¹⁶₈Z  
-----> 16 = mass number/ atomic mass
-----> 8 = atomic number

If the concentration of nitrosyl bromide is doubled, the rate of the reaction will also increase. This is because the rate of a reaction is directly proportional to the concentration of reactants.

As for the effect on the rate constant, it depends on whether the reaction is affected by the concentration of nitrosyl bromide alone or if other factors like temperature, pressure, or the presence of a catalyst are also influencing the rate constant. If the rate constant is dependent solely on the concentration of nitrosyl bromide, then it will also double when the concentration of the reactant is doubled. However, if other factors are influencing the rate constant, then the effect may be more complex.

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The compounds BaO, Fe₂O₃, ZnO, they all are ionic compounds.

Ionic compounds are compounds made up of positive and negative ions. Electrostatic forces hold them together. The following elements commonly form ionic compounds: nonmetals and metals, polyatomic ions, and transition metals.

Covalent compounds are compounds made up of two or more non-metallic elements. They join together by sharing electrons to achieve a stable electron configuration

BaO: Ba is a metal, while O is a nonmetal, therefore it's an ionic compound

Fe2O3: Fe is a metal, while O is a nonmetal, therefore it's an ionic compound

ZnO: Zn is a metal, while O is a nonmetal, therefore it's an ionic compound

Thus, all of the above compounds i.e. BaO, Fe₂O₃, ZnO are ionic compounds.

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It forms covalent compounds with sodium.

There are two molecular orbitals are needed to form one bonding molecular orbital and one anti-bonding molecular orbital.

Bond orbitals Electrons that spend most of their time between the nuclei of two atoms are placed in bonding orbitals, and electrons that spend most of their time outside the nuclei of two atoms are placed in anti-bonding orbitals.

Adding up the same number of atomic orbitals gives the same number of molecular orbitals. Two atomic orbitals combine to form two molecular orbitals. An anti-bonding orbital is essentially the opposite of a bonding orbital. They form when atomic orbitals combine in ways that lead to almost destructive interference.

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Minerals Can Be formed by Precipitation, Crystallization

Answer:

1. A constellation is a configuration of stars that form a pattern. True

2. The Little Dipper is a part of the constellation Ursa Major. False

3. The North Star is found in the Little Dipper.True

4. The North Star is also called Merak. False

5. The North Polar Constellations can be seen in the Northern Hemisphere. ales atterns in the night sky constellations .True

Answer:

A

Explanation:

That one doesn't fall in the category of carbon cycle. It has nothing to do with natural causes since it is a man made thing. Industrial activities is not a natural cause.

The number of mole of methane, CH₄ needed to produce 5.75 moles of water vapour is 2.875 moles

We'll begin by obtaining the moles of CH₄ that reacted from the balanced equation:

CH₄ + 2O₂ -> CO₂ + 2H₂O

From the balanced equation above,

2 moles of H₂O were obtained from 1 mole of CH₄

Using the above information, we can determine the number of moles of CH₄ needed for the reaction. Details below:

From the balanced equation above,

2 moles of H₂O were obtained from 1 mole of CH₄

Therefore,

5.75 moles of H₂O will be obtained from = (5.75 × 1) / 2 = 2.875 moles of CH₄

Thus, we can conclude that the number of moles of CH₄ needed is 2.875 moles

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Answer:

1. answer is subcutaneous tissue 2. answer is spleen

Explanation:

The subcutis is also known as the hypodermis or subcutaneous layer, and functions as both an insulator, conserving the body's heat, and as a shock-absorber, protecting the inner organs.

Excretory Organs. Organs of excretion include the skin, liver, large intestine, lungs, and kidneys. Together, these organs make up the excretory system.

Answer:

the answer is Subcutaneous Tissue

Explanation:

and the second one is Intestine

Answer:

independent variables are variables that aren't changed by the other variables you are trying to measure

The independence or dependence of a variable in an experiment is determined by how it is being manipulated or observed within the context of the experiment.

In scientific experiments, independent variables are the factors that researchers intentionally change to observe their effects on other variables. Dependent variables, on the other hand, are the variables that are observed or measured to assess the impact of changes in the independent variable.

In the context of an experiment involving a wire gauze and its height, let's clarify the terms:

Independent Variable: This is the variable that you deliberately change or manipulate in the experiment. It is the cause, and you're interested in how changes in this variable affect other factors.

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Answer: NH3 has a higher solubility rate than SbH3 because it has much stronger bonds. ... HoCH2CH2OH because it can form two bonds with water compared to the other molecule which can only form one.

HOPE THIS HELPS

An acidophile is a microorganism that thrives in an acidic environment, typically having an optimum pH range of 0-5.5. Therefore, an acidophile would grow best in a low pH-adjusted medium, preferably around pH 3-5.5.

An acidophile is an organism that thrives in an acidic environment. Therefore, it would grow best in a ph-adjusted medium that is acidic.

The optimal pH range for an acidophile varies between species, but it is generally below pH 5.5. In order to support the growth of acidophilic organisms, the pH of the medium must be adjusted accordingly, and it can be done by adding a strong acid such as hydrochloric acid or sulfuric acid to lower the pH.

Alternatively, acidic substances such as citric acid or acetic acid can be used to adjust the pH downward. It is important to note that the pH of the medium should not be lowered below the range in which the acidophile grows best, as this could lead to cell death. Therefore, it is essential to determine the optimal pH range for the acidophile in question before preparing the growth medium.

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a. Test samples from several different points. This is because chlorine residual can vary at different points in the system due to factors such as distance from the treatment plant and water flow.

When testing a distribution system for chlorine residuals, you should test samples from several different points. This is because chlorine residual can vary at different points in the system due to factors such as distance from the treatment plant and water flow. It is important to get an accurate representation of the chlorine residual throughout the system.

Additionally, it is recommended to test a sample from each point multiple times to ensure accuracy and consistency. The sample volume should be at least 100 mL and can be tested on-site using test kits or taken back to the laboratory. The ortho-toluidine method is one of several methods available for testing chlorine residual, but the specific method used may depend on factors such as regulatory requirements and equipment availability.

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Volume of 0.500 M C2H3OH and 0.500 M CH3O-Na that is required to prepare 0.100 L of pH = 5.00 buffer with a buffer strength reaction of 0.100 M = 31.6 mL of 0.500 M C2H3OH and 17.4 mL of 0.500 M CH3O-Na

To calculate the volume of 0.500 M C2H3OH and 0.500 M CH3O-Na required to prepare 0.100 L of pH = 5.00 buffer with a buffer strength of 0.100 M, we need to make use of the Henderson-Hasselbalch equation.Henderson-Hasselbalch equation is given as:  pH = pKa + log ([A-] / [HA])Where, pH is the pH of the buffer solution.

Pka is the negative logarithm of the acid dissociation constant ([H+][A-] / [HA]).[A-] is the concentration of the conjugate base.[HA] is the concentration of the weak acid.Let us calculate the concentration of the weak acid.  From the pH value, we can calculate the [H+].5.00 = 4.75 + log ([A-] / [HA])[A-] / [HA] = antilog (5.00 - 4.75) = antilog (0.25) = 1.78[Molar]Now, the buffer strength is 0.100 M.

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