once one component in a buffer solution drops in concentration to 10% of the other, the ph will change:

Answer:

Impure substances tend to have a slightly lower melting point than the pure substance.

Explanation:

The percent of the mass in a sample of zinc sulfate that comes from zinc would be 40.50%. Option 5.

The percent composition of a component in a substance is the ratio of the mass of the component and the mass of the substance itself.

This can be mathematically expressed as;

Pecent composition= mass of component/mass of substance x 100%

In this case, the substance is zinc sulfate, a compound that contains zinc, sulfur, and oxygen in a ratio 1:1:4.

The molar weight of zinc is 65.38 while the molar mass of the entire zinc sulfate is 161.442.

Thus, the percent of the mass of any sample of zinc sulfate that comes from zinc would be:

Percent zinc = 65.38/161.442 x 100

                    = 40.50%

In other words, the percent of zinc in any zinc sulfate sample would be 40.50%

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According to Avogadro's law equal volume of all gases at the same temperature and pressure contain equal number of molecules. At STP one mole of any gas behaving ideally occupies a volume of 22.414 L.

The volume occupied by one mole of a substance at a given temperature and pressure is defined as the molar volume at that temperature and pressure. The value of molar volume of an ideal gas at STP is important in stoichiometric calculations.

At STP, the number of molecules of a gas is given as:

Number of molecules of a gas (N) = V₀ in L /  22.414 × 6.022 × 10²³

Here  V₀ in L = 16500 = 16.5 L

N =  16.5 / 22.414  × 6.022 × 10²³

N = 4.433 × 10²³

Thus the number of molecules present is 4.432 × 10²³.

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Answer:

Chemically

Explanation:

Because chemical bonds form between the atoms.

Explanation:

beryllium must loss 2 electrons to form a stable octet to its nearest noble gas Helium.

It can loss electron because it is a metal and is placed in 2group and 2 period in group of alkaline earth metals.

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Answer:

Something that is elastic can return to its original shape after being stretched or compressed. As you stretch or compress an elastic material like a bungee cord or a rubber band it resists the change in shape. It exerts a counterforce in the opposite direction. Now if you pull back the rubber band u are using force now if you let go the force that you used to pull back is transferred into the band snapping and bouncing. This force is called an elastic force.

Answer:

it is something that will return back to shape and being stretched or compressed

Answer:

Explanation:

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

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

So we have

\(density = \frac{25}{90} = \frac{5}{18} \\ = 0.277777...\)

We have the final answer as

Hope this helps you

Answer:

Potassium: 1 Stratum: 2 Sodium: 1 Copper: 11 Calcium: 2 Lithium:1

Explanation:

The groups are columns on the periodic table

Start with the large circle in the diagram's nucleus, which is identified by the element's atomic number (the number of protons it contains).

Describe the atomic number.

The number of protons in an atom's nucleus is indicated by its atomic number.

2. To represent the electrons, draw circles all around the nucleus. The number of protons in the nucleus is the same as the number of electrons in each shell.

3. Label the circles with the number of electrons to indicate how many electrons are present in each shell.

4. Position the outermost shell furthest from the nucleus.

5. Starting with the innermost shell, electrons fill the other shells.

6. Pairs of electrons fill each shell until

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Create an atom diagram using the Bohr model. Directions Choose three elements from the following list. Use a periodic table to determine the number of protons, neutrons, and electrons. Draw a diagram of each element you have selected. Use a separate piece of paper for each element. Be sure your drawing is neat, legible, and accurate. Use this data table to record information about each element. Element #1 Element #2 Element #3 Element #4

Scientists collected evidence to form a valid theory about the formation and early development of the solar system include:

This is referred to the gravitationally bound system of the Sun and the objects that orbit it.

It also comprises of the planets and their moons and objects such as asteroids and the evidence which shows that the formation of the solar system are the gas and dust which form the stars and debris found around them.

This therefore makes it the evidence collected in the formation of the solar system mentioned the most appropriate choice.

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Answer:

Calcium

Explanation:

It has the largest atom

Answer:

 6.022 × 10²³ units of that substance 

Explanation:

The concentration of chemical exposure is influenced by various factors, including the persistence of the chemical, the LD50 (lethal dose 50%) of the chemical, and the solubility of the chemical.

The persistence of a chemical refers to its ability to remain in the environment or a biological system without breaking down or being eliminated. Chemicals that are persistent tend to accumulate over time, leading to higher concentrations and potential long-term exposure.

For example, persistent organic pollutants (POPs) like certain pesticides and industrial chemicals can bioaccumulate in organisms and concentrate in the food chain, resulting in higher exposure levels. The LD50 of a chemical represents the dose or concentration at which 50% of the exposed population is expected to die. While the LD50 primarily reflects the toxicity of a substance, it indirectly affects concentration.

Highly toxic chemicals with a low LD50 require lower concentrations to cause harm, potentially leading to higher exposure risks. The solubility of a chemical refers to its ability to dissolve in a particular solvent, such as water or fat. Solubility influences the distribution and availability of a chemical in different environmental or biological compartments.

For example, highly soluble chemicals may be more readily absorbed and distributed throughout the body, potentially resulting in higher systemic exposure.

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Answer:

The primary principle at work in a laser printer is static electricity, the same energy that makes clothes in the dryer stick together or a lightning bolt

Explanation:

Answer:

A. Instructions for inherited traits

Explanation:

Your traits (what makes who you are) are from your DNA, and the DNA sends instructions on how your body preforms to use/inherit those traits.

I don’t know a lot about DNA, but this is the best information I can provide.

Hope this helps! :)

The new (final) volume of the sample of gas is equal to 0.1922 \(cm^3\).

Given the following data:

To determine the new (final) volume of the sample of gas, we would apply Boyle's law:

Mathematically, Boyle's law is given by the formula;

\(PV = k\\\\P_1V_1 = P_2V_2\)

Where;

Making \(V_2\) the subject of formula, we have:

\(V_2 =\frac{P_1V_1}{P_2}\)

Substituting the given parameters into the formula, we have;

\(V_2 = \frac{47.8 \times 3}{746} \\\\V_2 = \frac{143.4}{746}\)

New volume = 0.1922 \(cm^3\)

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Answer: B, a fusion recrion creates waste material that is easier to store than fission.

Fusion produces far less harmful waste than fission does. The reliance of something independent like whether a reaction will stop on its own when something goes wrong is never indefinite (technological failures are unpredictable and destructive a lot of the time when it comes down to nuclear power).

Answer:

Usually the answer to this kind of question would be Condensation

Explanation:

You feel me my Guy...

Answer:

vaporization

Explanation:

Answer:  The combustion of methane (CH4) with O2.

Explanation:  This is a chemical reaction involving carbon:

 CH4 + 2O2 = CO2 + 2H2O

1) Draw the reactants in their anti-periplanar conformation.

2) Eliminate one of the hydrogens, forming a double bond between the two remaining atoms.

3) Consider the stereochemistry of the reaction to determine if the double bond is in a cis or trans conformation.

4) The resulting product is the major product formed from the elimination reaction.

The reaction you have provided is an elimination reaction, in which an alkene product is formed. The products of this reaction will depend on the reactants provided and the conditions used for the reaction. In particular, the major product of this reaction will be the one that follows the Zaitsev’s rule. When considering the stereochemistry of the reaction, the anti-periplanar conformation of the reactants must be taken into account.

The major product of the following elimination reaction will be an alkene with the double bond formed in the anti-periplanar conformation that follows Zaitsev's rule.

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Answer:

(see below)

Explanation:

Using the process of elimination:

It's not energy radiations because radiation is a way energy is transferred.

It's not energy transmissions because that's the transfer of energy from one medium to another, like the sun to a black construction paper through radiation. There are three ways of transmission: radiation, convection, and conduction.

It's not solutions because a solution is a homogenous mixture where it is uniform in composition and appearance throughout. Also, the term "energy solutions" makes no sense whatsoever.

It's most likely energy transformations because energy transformation, also called energy conversion, is the process of changing energy from one form to another.

Answer:

The triple beam balance

The percent composition of cesium weighs 100 g in a sample with total mass of 400 g is 25 %.

The mass percent of an element in a compound is the contribution from the element to the total mass of the compound. It is the ratio of the mass fraction of the element to the total mass multiplied by 100.

Mass percent is a common term used to express the concentration of an ion or element in a mixture.

Given that total mass of the compound = 400 g

mass of cesium in the compound = 100 g.

Mass percent of cesium =  mass of Cs/total mass

  mass % = 100 /400 × 100 = 25%

Therefore, the mass % of Cs in the compound is 25%.

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Answer:

231.735 g/mol

Explanation:

The pair of elements which are non-metals and at the same time; gases at room temperature and normal atmospheric pressure are as follows:

N2, O2, He, Ar

An element is a substance which cannot be split into simpler units by any ordinary process.

Some few examples of elements include:

Hydrogen

Helium

Lithium

Beryllium

Boron

Carbon

Nitrogen

Oxygen

Fluorine

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Answer:

k

Explanation:

electron affinity (EA) depends on various factors like effective nuclear charge (enc) , size of the atom, ellipticity of sub-shell (ep) , nature of configuration.

more is the enc more will be the EA

more is the size less will be the EA

more valance shell ellipticity (closer to the nuclei) more will the EA ( all given element posses P orbital in the valance shell)

After opening to trade, a capital-abundant country will export the capital-intensive good and both the country and its trading partners will be better off. Capital-intensive goods refer to those products that require more investment in machines, equipment, and technology for their production.

Since a capital-abundant country has a relatively higher amount of capital, it can produce these goods more efficiently than labor-intensive products. By exporting capital-intensive goods, the country can earn higher profits and increase its overall economic growth. Furthermore, the exporting of capital-intensive goods can also lead to improved economic conditions for its trading partners. These partners can purchase these goods at a lower price, as the exporting country can produce them at a lower cost. The importing of these goods will lead to an increase in consumption, investment, and overall economic growth in the importing countries.

In conclusion, the opening to trade can benefit a capital-abundant country through the exporting of capital-intensive goods, which leads to increased profits and economic growth. It also benefits the importing countries through the increased availability of these goods at a lower cost, leading to improved economic conditions.

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Reflecting telescopes are preferred for scientific research because they are better suited for gathering large amounts of light and producing high-quality images. However, refracting telescopes are still popular for amateur astronomers and for viewing objects on Earth.

Reflecting telescopes are different from refracting telescopes because reflecting telescopes use mirrors, whereas refracting telescopes use lenses. The reflecting telescope was invented in 1668 by Sir Isaac Newton, and it has since become one of the most popular types of telescopes.
Reflecting telescopes use a mirror to gather and focus light, while refracting telescopes use a lens to do the same thing. Reflecting telescopes can be made much larger than refracting telescopes because it is easier to make large mirrors than it is to make large lenses. The mirror in a reflecting telescope is placed at the back of the telescope, and it gathers and reflects light back to a secondary mirror, which then reflects the light to the eyepiece. The eyepiece is where the observer looks through the telescope.In contrast, the lens in a refracting telescope is placed at the front of the telescope, and it gathers and bends light as it passes through. The lens focuses the light onto an eyepiece at the back of the telescope. Refracting telescopes are generally smaller than reflecting telescopes because of the difficulty of making large lenses.
Another difference between reflecting and refracting telescopes is the way they are constructed. Reflecting telescopes have a simple tube that houses the mirrors and eyepiece, while refracting telescopes have a more complex design with a long tube that contains the lens and eyepiece.

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Answer

1.50 mol

Explanation

Given:

Initial volume, V₁ = 25.0 L

Mass of CH4 gas in 25.0 L container = 40 g

Final volume, V₂ = 15.0 L

From the Periodic Table; molar mass of CH4 = 16.04 g/mol

What to find:

The new amount in mole.

Step-by-step solution:

According to Avogadro’s law: For a confined gas, the volume (V) and number of moles (n) are directly proportional if the pressure and temperature both remain constant. That is:

n₁ = Mass/Molar mass = (40.0g/16.04 g/mol) = 2.493765586 mol

n₂ is the new amount in mole and can be calculated as follows:

The new amount in moles is 1.50 moles

Answer:

e.  More protons than electrons

f.   2 more protons than electrons

g.  Cation (anoin is for negatively charged atoms).

Explanation:

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