Question 4
5.21 cm is the same distance as

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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What causes the changes in the ice ages is when the earth's orbits tilts.

The ice ages are caused by changes in Earth's orbit and tilt, which affect the amount of solar radiation received by the planet. These changes alter the climate and trigger the growth and retreat of ice sheets.

We know that the changes in the climates is responsible for most of the changes that we can see in the universe as we have come to experience it today.

Thus the earth's orbits is what does control the changes in the ice ages.

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Answer:

d. selenium (Se) I’m a non metal

Explanation:

What we know about the element in view is that it has:

              4 orbitals

              6 valence electrons

The orbitals are the energy levels in the element.

Valence electrons are the outermost shell electrons.

The orbitals tells us the periods in which an element belongs. Since we have 4 orbitals, this suggests that our element belongs to the 4th period.

The number of valence electrons tells us the group in which the element could be found. Since we have 6 valence electrons, the group number is 6.

Therefore, the element is period 4 and group 6 is selenium. Selenium is a non-metal.

Answer:

Known as the "king of the jungle" or the "king of beasts," lions are at the top of the food chain, and they hunt and eat other animals to survive. Their niche in the ecosystem allows them to help with other animal population control and prevent the spread of disease.

Explanation:

I think the answer is C. (Increasing the number of variables in the experiment)

Answer:

ITS B

Explanation:

THE OTHER GUY WAS WRONG

The specific heat of the metal can be calculated using calorimetric equation. The specific heat of the metal here is 0.61 J/g °C.

The specific heat capacity of  substance is the heat energy required to raise its temperature by one degree Celsius per one gram  of the substance.

The calorimetric equation connecting the heat energy q, mass m, specific heat c and temperature difference ΔT is:

q = m c  ΔT

Here, the heat released from the metal is equal to the heat absorbed by water.

Therefore,

q metal = q water. Let c  be the specific heat of the metal.

25 g  × ( 99 - 20.15°C) ×c = 50 g  × ( 20.15°C- 14.33) × 4.18 J/g °C

                                         = 1217.5 J

Then c = 1217.5 J/25 g  × ( 99 - 20.15°C)  = 0.61 J/g °C.

Therefore, the specific heat of the metal is 0.61 J/g °C.

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Answer:

na

Explanation:

Answer:

b

Explanation:

Answer:

\(n_{H_2O}=5.94molH_2O\)

Explanation:

Hello there!

In this case, according to the given question about stoichiometry, it is possible for us to calculate the required moles of water that will be produced by 12 grams of hydrogen, by using the molar mass of this reactant (2.02 g/mol as it is diatomic) and the 2:2 mole ratio in the chemical equation by solving the following setup:

\(n_{H_2O}=12gH_2*\frac{1molH_2}{2.02gH_2} *\frac{2molH_2O}{2molH_2} \\\\n_{H_2O}=5.94molH_2O\)

Regards!

Answer:

Compound

Hope it helps!

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1, depending on which rate was used to calculate it.

The rate of the reaction is given by the equation:

Rate = -k[A]

where k is the rate constant and [A] is the concentration of the reactant.

Rate at t=140 s:

Rate = (8.00×10−2 M - 0 M) / (140 s - 0 s)

= 5.71×10−4 M/s

Rate at t=400 s:

Rate = (4.00×10−2 M - 0 M) / (400 s - 0 s)

= 1.00×10−4 M/s

Since this is a zero-order reaction, the rate of the reaction is constant, and we can use either rate to calculate the rate constant:

k = Rate / [A]

Using the rate at t=140 s:

k = 5.71×10−4 M/s / 8.00×10−2 M = 7.14×10−3 s−1

Using the rate at t=400 s:

k = 1.00×10−4 M/s / 4.00×10−2 M

= 2.50×10−3 s−1

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1.

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A methane molecule (CH4) is considered symmetrical because it possesses a symmetric structure and exhibits symmetry operations.

Symmetry refers to a balanced arrangement of elements that can be divided into equal parts by a plane, axis, or center. In the case of methane, it exhibits several symmetrical characteristics.

Firstly, methane has a tetrahedral molecular geometry, with the carbon atom at the center and four hydrogen atoms positioned around it. This geometry ensures that the molecule is symmetrical in terms of its spatial arrangement.

Each hydrogen atom is located at one of the vertices of the tetrahedron, forming equal angles and distances with respect to the central carbon atom. This symmetry is maintained regardless of the orientation of the molecule.

Additionally, methane possesses rotational symmetry. It can be rotated around any of the carbon-hydrogen bonds, and the molecule will retain its overall appearance.

The symmetry of methane arises from its molecular structure and the equal distribution of electron density around the central carbon atom. The four hydrogen atoms are bonded to the carbon through sigma bonds, which have a cylindrical symmetry. This balanced arrangement of the atoms contributes to the overall symmetry of the molecule.

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Isaac Newton must note that scientific findings did not definitively dismiss the possibility of chemical gold manufacture until the eighteenth century.

While alchemy has not survived modern scientific scrutiny, it did contribute to the creation of modern scientific procedures. Although gold cannot be created from other materials, it may be extracted from a variety of them.

Because alchemy is a proto-science rather than a legitimate science, Newton should abandon his alchemy focus in favor of actual chemistry.

Alchemy is a historical branch of natural philosophy, a philosophical and proto-scientific tradition practiced in China, India, the Muslim world, and Europe.

Alchemy initially appears in its Western form in a variety of pseudepigraphical books written in Greco-Roman Egypt during the first several decade's AD.

Certain materials were purified, matured, and perfected by alchemists. The conversion of "base metals" (e.g., lead) into "noble metals" (especially gold) was a common goal.

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Answer:

Explanation:

Here, we want to calculate the mass that would dissolve

Mathematically:

The molar mass of carbon (iv) oxide is 44 g/mol

Thus, we have the number of moles as:

According to Henry's law:

Where;

C is the concentration of dissolved gas

K is the Henry's constant

P is the pressure

Now, from the question, we have:

k = 3.2 * 10^-2

P = 2.75

C is the number of moles per liter which we will represent by the number of moles

Thus, we have it that:

The binding energy per nucleon for the ¹⁹F nucleon is equal to 7.786 MeV/nucleon.

Binding energy can be defined as the minimum quantity of energy that is required to remove the particle from the system. Nuclear binding energy can be described as the energy required to dismantle a nucleus of an atom into free neutrons and protons.

The binding energy will be determined from the mass defect. Mass defect is calculated from the difference between the mass observed and the expected combined mass.

Given the mass of the ¹⁹F = 18.9984 a.m.u.

The mass defect for the ¹⁹F can be calculated as:

Δm = \((M _n +M_p) - M_F\)

\(\triangle m =( 9\times 1.0078 + 10 \times 1.0087 )- 18.9984\)

\(\triangle m =0.1588 \;a.m.u.\)

The binding energy for the fluorine can be calculated as:

E = Δmc²

E = 0.1588 × 931.5

E = 147.92 MeV

The binding energy per nucleon of ¹⁹F can be calculated as:

B.E.N. = 147.92/18.9984 = 7.786 MeV per nucleon

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Answer:

Sodium becomes a positive ion and chlorine becomes a negative ion. ... Each atom is neutrally charged, which means that each atom has the same number of protons and electrons.

Explanation:

Answer:  There are three main types of forests: tropical rainforests, deciduous forests, and coniferous forests. Tropical rainforests are found near the equator (the center of Earth), where they are warm all year round.

Explanation:

Ecosystems are defined as a geographical region where biotic factors like animals, plants and microorganisms live together and interact with the abiotic factors.

The three forest ecosystems are temperate, boreal and tropical.

Tropical forest ecosystems have high precipitation and temperature also a high humidity rate. The plant has a twelve-month growing period and the forests are found near the equator regions.

Temperate is found in between the boreal and the tropical forests, it has a high level of rainfall and humid conditions and is covered with the deciduous type of trees.

Boreal or the taiga forest ecosystems are located in the subarctic regions with low temperatures and have long winters. They are covered majorly by the scale-leaved evergreen and the needle leaves cones.

All three forest ecosystems have great species diversity, the tropical and the temperate forest have dense vegetation and the temperate and boreal have evergreen forests.

Therefore, three forest ecosystems are temperate, boreal and tropical.

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Answer:

83

Explanation:

3X + 2Y → 5C + 4D

2 moles of Y will produce 5 moles of C

33.0 moles of Y will produce: 33.0 x 5/2 = 82.5 or 83 moles of C

Answer:

longitudinal

Explanation:

A prime meridian is the meridian (a line of longitude) in a geographic coordinate system at which longitude is defined to be 0°. Together, a prime meridian and its anti-meridian (the 180th meridian in a 360°-system) form a great circle. This great circle divides a spheroid into two hemispheres.

Answer:

a - the position of equilibrium lies far to the right, with products being favored.

Explanation:

Answer:

its A on edge :)

Explanation:

Answer:

CuSO4·xH2O is a hydrated copper(II) sulfate compound where x represents the number of water molecules associated with each copper(II) sulfate molecule.

To determine the value of x, we need some additional information, such as the mass of the hydrated compound or the percentage of water by mass.

For example, if we have the mass of the hydrated compound, we can use it to determine the mass of copper(II) sulfate and the mass of water. Then, we can use the molar mass of CuSO4 and H2O to calculate the number of moles of each substance. Finally, we can use the molar ratios to find the value of x.

Let's take an example: suppose we have 5 grams of CuSO4·xH2O and upon heating, we found that 1.25 grams of water is lost. We can use this information to calculate the value of x as follows:

Calculate the mass of copper(II) sulfate:

mass of CuSO4 = mass of CuSO4·xH2O - mass of water lost

mass of CuSO4 = 5 g - 1.25 g

mass of CuSO4 = 3.75 g

Calculate the number of moles of copper(II) sulfate:

moles of CuSO4 = mass of CuSO4 / molar mass of CuSO4

moles of CuSO4 = 3.75 g / 159.61 g/mol (molar mass of CuSO4)

moles of CuSO4 = 0.0235 mol

Calculate the number of moles of water:

moles of H2O = mass of water lost / molar mass of H2O

moles of H2O = 1.25 g / 18.02 g/mol (molar mass of H2O)

moles of H2O = 0.0693 mol

Use the molar ratio of CuSO4 to H2O to find the value of x:

moles of H2O / moles of CuSO4 = x

0.0693 mol / 0.0235 mol = x

x = 2.95

Therefore, in this example, the value of x is approximately 2.95, which means that each copper(II) sulfate molecule in the hydrated compound is associated with approximately 2.95 water molecules

Explanation:

If any Wrong Comment on this I edit it. Thank You

Answer:

Explanation:

The actual boiling point is probably between 34C and 40C.

Temperature measures the average kinetic energy of particles of the substances. Therefore, the correct option is option D that is the actual boiling point is probably between 34°C and 40°C.

Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.

Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source.

We can convert these units of temperature into one another. The relationship between degree Celsius and Fahrenheit can be expressed as:

°C={5(°F-32)}÷9

The actual boiling point is probably between 34°C and 40°C.

Therefore, the correct option is option D.

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Answer:

27.43 kPa (Option A)

Explanation:

We can solve this by the use of the Ideal Gases Law.

P . V = n . R . T

As n and R are constant, we avoid them from the equation so:

P₁ . V₁ / T₁ = P₂ . V₂ / T₂

P₁ . 0776L / 298K = 32.6 kPa . 0.664L / 303K

P₁ . 0776L / 298K = 0.0714 kPa .L/K

P₁ . 0776L = 0.0714 kPa .L/K  . 298K

P₁ = 21.289 kPa.L / 0.776L

P₁ = 27.43 kPa

Answer:

1.135986935e+39

Answer:

\(\boxed {\boxed {\sf 4.60 \times 10^{23} \ atoms \ Mg}}\)

Explanation:

We are asked to find how many atoms of magnesium are in 0.764 moles of magnesium.

We convert moles to atoms using Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of magnesium. So, there are 6.022 × 10²³ atoms of magnesium in 1 mole of magnesium.

Convert using dimensional analysis and set up a conversion factor using Avogadro's Number.

\(\frac{6.022 \times 10^{23} \ atoms \ Mg}{1 \ mol \ Mg}\)

We are converting 0.764 moles of magnesium to atoms, so we multiply by this value.

\(0.764 \ mol \ Mg *\frac{6.022 \times 10^{23} \ atoms \ Mg}{1 \ mol \ Mg}\)

The units of moles of magnesium cancel.

\(0.764 *\frac{6.022 \times 10^{23} \ atoms \ Mg}{1 }\)

\(0.764 *6.022 \times 10^{23} \ atoms \ Mg\)

\(4.600808 \times 10^{23} \ atoms \ Mg\)

The original value of moles (0.764) has 3 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place. The 0 in the thousandth place tells us to leave the 0 in the hundredth place.

\(4.60 \times 10^{23} \ atoms \ Mg\)

0.764 moles of magnesium contains approximately 4.60 × 10²³ atoms of magnesium.

The numbering of the compound which gives the methyl substituent the lowest number is 1-methylcyclohexene and 3-methylcyclohexene and not 2-methylcyclohexene.

In the reaction, the substrate is 2-methyl cyclohexanol. The reaction that takes place here is a dehydration reaction. In the reaction, the acid first protonates that -OH group to form water which is a good leaving group.

A carbocation is now formed and abstraction of hydrogen could occur at carbon number 1 or 3 and the numbering of the compound which gives the methyl substituent the lowest number is 1-methylcyclohexene and 3-methylcyclohexene and not 2-methylcyclohexene.

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Considering the definition of molar mass, 1 mole of sucrose has 342 grams.

The molar mass of substance is a property defined as the amount of mass that a substance contains in one mole.

The molar mass of a compound is the sum of the molar mass of the elements that form it multiplied by the number of times they appear in the compound.

Sucrose is a disaccharide formed by glucose and fructose whose formula is C₁₂H₂₂O₁₁.

You know the molar mass of the elements is:

So, the molar mass of the sucrose is calculated as:

C₁₂H₂₂O₁₁= 12×12 g/mole + 22× 1 g/mole + 11× 16 g/mole

Solving:

C₁₂H₂₂O₁₁= 342 g/mole

Finally, considering the definition of molar mass, 342 grams of sucrose are contained in 1 mole.

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Answer:

neap tide

Explanation:

There are two different types of tides, which are the spring tide and the neap tide.

Neap tides are weak tides which occur when the gravitational forces of the sun and the moon are at right angles to each other with respect to the earth. Since the sun and moon are at right angles, it causes a difference between the low and high tide.

The spring tide are strong tides which occur when the moon, sun and earth are in straight line. The spring tide occur during full moon and new moon.

Answer:

Neap Tides  

The result is a neap tide. The same effect happens during third quarter. These occur during first and last quarter moons. The gravitational pull is not as strong.

Explanation:

the first answer is correct

The mass of the box A is 10 g and the mass of box b is 5 g. The mass ratio between them is:

mass of box a = 10 g

mass of box b = 5 g

mass ratio A/B = mass of box A/mass of box B

mass ratio A/B = 10 g/5 g

mass ratio A/B = 2