What causes high and low tides?
O A. Variations in salinity and temperature transmit waves across the
ocean.
B. As Earth rotates, the moon's gravity pulls on different parts of the
planet.
C. Ocean water is driven by differences in water density.
D. Underwater disturbances displace large amounts of water.
SUBMIT

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question we have

\(volume = \frac{56.94}{19.32} \\ = 2947204...\)

We have the final answer as

Hope this helps you

The answer of the question is closest to (b) 0.393g. To find the grams of helium, we can use the ideal gas law: PV = nRT.

To solve this problem, we can use the combined gas law which states that PV/T is constant for a given amount of gas. Using this, we can set up the equation:
(P1V1/T1) = (P2V2/T2)
Plugging in the given values, we get:
(1.30 atm)(2.60 L)/(314.15 K) = (2(1.30 atm))(2(2.60 L))/(2(314.15 K))
Simplifying this, we get:
n = PV/RT = (1.30 atm)(2.60 L)/(0.0821 L atm/mol K)(314.15 K) = 0.101 mol
Then, we can use the molar mass of helium to find the mass:
mass = n x molar mass = 0.101 mol x 4.0 g/mol = 0.404 g
Therefore, the answer is closest to (b) 0.393 g, which is the only option within 0.01 g of our calculated value.

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The number of molecules in one mole of hydrogen gas is 6.02 × 10²³ . The number of molecules in 10 moles of hydrogen gas is then 6.022 ×10²⁴.

Any substance  that contains   6.022 × 10²³ number of atoms is called ne mole of that substance. This number is called Avogadro number. Hence, one mole of every elements contains Avogadro number of atoms.

Hydrogen  is the first element in periodic table. It is an alkali metal. The number of molecules  in one mole of H₂ is equal to Avogadro number. Mass of a molecule with one mole of amount is called its molecular mass.

Number of molecules of H₂ in one mole  =  6.02 × 10²³  

Then number of molecules in 10 moles is Avogadro  number times the number of moles.

= 10 × 6.022 × 10²³ =  6.022 ×10²⁴ molecules

Therefore, 10 moles of  H₂ contains  6.022 ×10²⁴molecules..

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The solubility rules are completely adequate in predicting the solubility of most ionic compounds in water.

However, there might be exceptions or complexities in some cases, so it's essential to consider experimental data and other factors when determining solubility.

Solubility rules are a set of guidelines that help predict the solubility of ionic compounds in water based on the properties of the ions involved. These rules are based on the principle that like dissolves like, meaning that polar solvents like water can dissolve ionic compounds that have polar ions.

The solubility rules can accurately predict the solubility of most ionic compounds in water. For example, according to the solubility rules, all nitrates (NO3-) and most alkali metal (Group 1) and ammonium (NH4+) salts are soluble in water.

However, there might be exceptions or complexities in some cases. For example, some compounds that contain ions that are typically insoluble in water may dissolve due to the presence of other ions in the solution.

Moreover, other factors such as temperature, pressure, and the pH of the solution can also affect solubility. For instance, increasing the temperature can increase the solubility of some ionic compounds, while decreasing the temperature can decrease solubility.

Similarly, changing the pH of the solution can affect solubility because it can alter the charge on the ions and the solubility rules are based on the properties of the ions involved.

Therefore, while the solubility rules are generally accurate in predicting solubility, they should be used with caution and in conjunction with experimental data and other factors that may affect solubility.

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Answer:

Rigid container holds hydrogen gas at a pressure of 3.0 atmospheres and a temperature of 2 degrees Celsius. The pressure if the temperature is raised to 10 degrees Celsius will be 15 atmospheres based on the law of pressure for gas.Explanation:

Answer: C. 1000 Newton

Explanation:

Given that :

Weight of moon rover on earth = 6000 newton

Approximate of moon rover on moon will be?

Weight of an object (W) = mass(m) × acceleration due to gravity(g)

To get the mass of moon rover(m) :

m = weight / acceleration due to gravity

g on earth = 9.8m/s²

Hence,

mass of moon rover = 6000/ 9.8

= 612.244kg

Surface gravity on the moon is about 1.6m/s²

Hence ;

Weight of moon rover on the moon :

Mass of moon rover × 1.6m/s²

= 612.244 × 1.6m/s²

= 979.59 Newton

= 1000 Newton (nearest thousand)

The approximate weight of the Moon Rover on the Moon is 1000 N

The correct answer to the question is Option C. 1000 N

We'll begin by calculating the mass of the Moon Rover. This can be obtained as follow:

Weight (W) = 6000 N

Acceleration due to gravity (g) = 9.8 m/s²

W = m × g

6000 = m × 9.8

m = 6000 / 9.8

Acceleration due to gravity of the moon (g) = 1.67 m/s²

Mass (m) = 612.24 Kg

W = m × g

W = 612.24 × 1.67

Therefore, the approximate weight of the Moon Rover on the Moon is 1000 N

The correct answer to the question is Option C. 1000 N

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Answer:

Aluminum isn't found pure naturally, but its found mixed with other minerals in the earth. It's used to make cans, foil, kitchen utensils, window frames and even deodorant

Explanation:

Answer:

temperatures.

Explanation:

Movement of heat flowing from one object to the other is a result from difference in temperature. Heat will flow from your warmer object to the cooler object until they both reach the same temperature.

Answer:

He has two protons

Li electron has one electron in its outermost orbital.

Number of neutrons of nitrogen = seven neutrons

The second shell of boron: 3 electrons.

Explanation:

An atom is composed of electrons, protons and neutrons. The number of neutrons is determined by subtraction of the atomic number from the mass number.

The electronic configuration is already known for each of atoms in these questions according to standard tables.

Answer:

1.) Make a He atom with a mass of 4. How many protons did you put in the nucleus?

2

2.) Make a Li atom with a mass number of 7. How many electrons did you place in the outermost orbital (ring)?

1

3.) Make a N atom with a mass number of 14. How many neutrons are in the nucleus?

7

4.) Make a B atom with a mass number of 11. How many electrons did you put in the second orbital (ring)?

3

Explanation:

Did it on Edgenuity and got it correct (2020).

Answer:

It takes 6h to the radioactive source decrease its activity from 200 to 25

Explanation:

The equation that describes the readioactive decay is:

Ln [A] = -kt + Ln [A]₀

Where [A] could be taken as activity of the source after time t, [A]₀ is initial activity and k is decay constant.

Decay constant could be written as:

k = ln2 / Half-life

k = ln 2 / 2h

k = 0.3466h⁻¹

Replacing in decay equation:

Ln [25] = -0.3466h⁻¹t + Ln [200]

-2.0794 = -0.3466h⁻¹t

6h = t

It takes 6h to the radioactive source decrease its activity from 200 to 25

After washing glass ware with acetone, the acetone should be disposed of properly in a designated hazardous waste container.

Acetone is considered a hazardous waste due to its flammability and potential harm to human health and the environment. Pouring acetone down the drain or into the trash can contaminate the water supply or harm wildlife. It is important to follow the regulations and guidelines set by your local waste management facility when disposing of acetone and other hazardous materials.After washing glass ware with acetone, the acetone should be disposed of properly in a designated hazardous waste container.  Contact your local waste management facility or a licensed hazardous waste disposal company to inquire about proper disposal methods. It is also important to handle acetone with care, as it is a highly flammable substance that should be stored in a cool, dry, and well-ventilated area. Always wear protective gloves, goggles, and a respirator when working with acetone to minimize exposure to its harmful effects.

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A chemical compound's mass M is equal to its amount of material, expressed in moles, multiplied by its molar mass.

It is one of the fundamental quantities in physics and the most fundamental property of matter. The quantity of matter in a body is referred to as its mass.

A thing's mass is how much matter it has. Something will weigh more the more matter it contains. For instance, an elephant weighs more than a mouse because it contains more stuff. The amount of matter an item contains is independent of its size.

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The intermediate formed during dehydration reaction is highly unfavorable due to the ring strain of cyclobutane, so the reaction does not proceed further to form: 1-methylenecyclobutane.

the E1 mechanism is a two-step process in which the leaving group is eliminated first to form a carbocation intermediate, followed by a deprotonation step to form the alkene product. The E1 mechanism is typically observed in reactions with tertiary or secondary substrates, where the formation of a stable carbocation intermediate is possible.

The exocyclic alkene =1-methylenecyclobutane cannot be synthesized from a tertiary alcohol due to the mechanism involved in the dehydration reaction.

In the presence of an acid catalyst, such as sulfuric acid (H2SO4), tertiary alcohols undergo dehydration to form alkenes via an E1 mechanism. The E1 mechanism involves the formation of a carbocation intermediate, which then undergoes deprotonation to form the alkene.

However, in the case of =1-methylenecyclobutane, the formation of the carbocation intermediate is not possible due to the strain on the cyclobutane ring. The cyclobutane ring has a high ring strain due to the angle strain and torsional strain associated with the sp3 hybridization of its carbon atoms.

Therefore, the formation of a carbocation intermediate in the cyclobutane ring is highly unfavorable, and the tertiary alcohol cannot undergo dehydration to form =1-methylenecyclobutane.

Here's a simplified mechanism:

Step 1: Protonation of the alcohol group

RH3C-OH + H+ → RH3C-OH2+

Step 2: Loss of a water molecule to form a carbocation intermediate

RH3C-OH2+ → RH3C+ + H2O

However, in the case of a cyclobutane ring, the intermediate would be:

Step 2: Formation of carbocation intermediate in cyclobutane ring

RH3C-OH2+ → RH2C=C(H)-CH2+ + H2O

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A sample of PCl₃ gas occupies 652 mL at 998 kPa at 33°C. If the sample is transferred to a 500 mL flask at 33 °C, the gas pressure in the flask will be 831.3 kPa. This is using ideal gas equation.

The equation of state for a fictitious perfect gas is known as the ideal gas law, sometimes known as the generic gas equation. Although it has some restrictions, it is a good approximation of the behavior of numerous gases under various circumstances. Benoît Paul Émile Clapeyron introduced it for the first time in 1834 as a synthesis of the empirical Boyle's law, Charles' law and Avogadro's law.The empirical form of the ideal gas law is frequently used:

PV = nRT

Using the ideal gas law (PV = nRT), we can solve this problem.

Calculate the number of moles of gas:

n = (998 kPa x 652 mL) / (8.31 J/mol x K x 33 °C)

n = 0.596 moles

Calculate the pressure in the new flask:

P₂ = (n x 8.31 J/mol x K x 33 °C) / 500 mL

P₂ = 831.3 kPa

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Considering the definition of efficiency, the percent efficiency of the computer is 80%.

Energy efficiency is defined as the efficient use of energy. A device, process or installation is energy efficient when it consumes less than the average amount of energy to carry out an activity.

The efficiency of a device is the proportion of the energy supplied that is transferred in useful ways. The efficiency can be calculated as a decimal or a percentage.

The efficiency of a device can be calculated as:

Expressed as a decimal: \(efficiency =\frac{useful energy out}{total energy in}\)

Expressed as a percentage: \(efficiency =\frac{useful energy out}{total energy in}x100\)

In this case, you know:

Replacing in the definition of efficiency:

\(efficiency =\frac{400 J}{500 J}x100\)

Solving:

\(efficiency =0.8x100\)

efficiency= 80%

Finally, the percent efficiency of the computer is 80%.

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Raisin bran is classified as a heterogeneous mixture as it has 2 distinct components bran and raisin.

Heterogeneous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.

As there are two or more phases present in heterogeneous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.

Components of a heterogeneous mixtures are distinctly visible . There are two types of heterogeneous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.Bran and raisins are 2 distinct components present.Thus, the correct option is heterogeneous mixture.

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Answer:

During a phase change, the addition of thermal energy will result in the temperature of a substance remaining constant as the electrostatic forces of the particles are overcome.

Phase changes occur when a substance changes from one state of matter to another, such as from a solid to a liquid or from a liquid to a gas. During a phase change, the thermal energy being added to the substance is used to overcome the electrostatic forces that hold the particles together, rather than being used to increase the kinetic energy of the particles. As a result, the temperature of the substance remains constant until the phase change is complete.

For example, when a solid is being melted into a liquid, the thermal energy being added is used to break the bonds between the particles in the solid. As a result, the temperature of the solid remains constant until all of the bonds have been broken and the substance has completely melted. Similarly, when a liquid is being vaporized into a gas, the thermal energy being added is used to overcome the attractive forces between the particles in the liquid, resulting in a constant temperature until the phase change is complete.

Explanation:

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The empirical formula of a compound made up of 94.5 g of aluminum and 199.5 g of fluorine is AlF₃.

To determine the empirical formula of the compound, we need to first calculate the moles of each element present in the sample.

Moles of aluminum = 94.5 g / 26.98 g/mol = 3.50 mol

Moles of fluorine = 199.5 g / 18.99 g/mol = 10.51 mol

Next, we need to determine the smallest whole number ratio between these two values.

Dividing both values by 3.50, we get:

Moles of aluminum = 1

Moles of fluorine = 3

Therefore, the empirical formula of the compound is AlF₃.

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High-throughput sequencing is a revolutionary technology that has transformed genomics in recent years. It has enabled a more precise understanding of the genetic, epigenetic, and transcriptomic components of cells and organisms. It can be challenging to compare different high-throughput sequencing technologies because of the technical differences, making the sequencing results significantly different. High-throughput sequencing can be achieved through three primary technologies; the Illumina sequencing, 454 sequencing, and Ion torrent sequencing.

The Illumina sequencing technology employs a massively parallel sequencing strategy in which hundreds of millions of short reads are simultaneously generated from the templates. The Illumina sequencer can generate up to 1 billion reads per run. The technology utilizes fluorescently labeled dNTPs, which are incorporated into the sequencing reactions to read DNA sequences. The 454 sequencing technology uses sequencing by synthesis to read DNA sequences. DNA molecules are amplified in micrometer-sized wells, which allow for the capture of a single bead containing a single DNA molecule. Pyrosequencing technology is used to sequence the nucleotides. The 454 sequencing system can produce up to 700,000 long reads per run.

The Ion Torrent sequencing technology has a semiconductor-based sequencing mechanism that uses the same sequencing-by-synthesis principle as the 454 sequencing system. It works by converting the signals that are produced during the sequencing reaction into digital values, which are then recorded and analyzed by a computer. The technology has the ability to produce up to 1 million reads per run. In summary, high-throughput sequencing technologies have changed the way that genomics research is conducted. Each technology has its own unique strengths and limitations. In conclusion, Illumina sequencing can sequence millions of different molecules at the same time by massively parallel sequencing strategy, 454 sequencing uses sequencing by synthesis to sequence DNA sequences, and the Ion Torrent sequencing uses a semiconductor-based sequencing mechanism to read DNA sequences.

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Answer:

Explanation:

1s^2 2s^2 2p^6 3s^1

Answer:

B A B  sorry if its wrong

Explanation:

Circuits can be connected in series or parallel but the maximum voltage is obtained in series connection, thus, light bulbs shine brightest in series connection.

A parallel circuit connection is one in which the terminals of all the components in th circuit meet at two points.

The components are parallel to each other and current flows in multiple directions.

A series connection in a circuit is one in which the terminals of the component parts in a circuit are joined end to end. Current flows in one direction.

The voltage in a series connection is the sum of all the individual cells, therefore, the light bulb in series connection shines brightest.

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The following is the introduction to a special e-publication called Determining the Age of the Earth (click the link to see a table of contents). Published earlier this year, the collection draws articles from the archives of Scientific American. In the collection, this introduction appears with the title, “Stumbling Toward an Understanding of Geologic Timescales.”

Answer:

Explanation:

1. The element you selected is Sodium. some of the physical properties are

i. Sodium has a strong metallic lustre

ii. Sodium are usually silver white in color

iii. Sodium is soft it can be cut with knife

iv. Sodium are malleable and ductile.

v.  Sodium conduct electricity

Sodium belong to group 1 elements which are called Alkali metals. Sodium have one valency electron and it gives this electron easily during bonding . This is one reason sodium and other alkali metals are very reactive. Sodium can instantly be oxidized by water.  Sodium has a relative atomic mass of approximately 23 amu.

2. There are various models that describe atoms .This models includes John Dalton models, J.J Thompson model, Ernest Rutherford model, Bohr's models etc. This models made us understand the role and location of each sub atomic particles. The models shed more light on subatomic particles like electron which revolve around the nucleus.  It provide more information on what contribute to the weight of an atom.

3. The proton , neutron and electron are subatomic particles of an atom. The proton and the neutron are located at the nucleus of an atom.  The proton and neutron contributes majorly to the weight of an atom. The proton is positively charge while neutron has no charge.

Electron is found to move around the nucleus in cloud. The electron is negatively charge. The electron determines bonding of atoms. An atom is electrically neutral if the number of proton is equal to the number of electron.

4. The four fundamental forces includes weak nuclear forces , strong nuclear forces , gravity and electromagnetic forces.

Weak nuclear forces is responsible for particle decay .Nuclear forces don't play a role in chemical reaction . If they are involve in a reaction it becomes nuclear reaction not chemical reaction.

Strong nuclear forces causes a strong nuclear interaction and it is the strongest among the 4 fundamental forces. This strong force only operate when subatomic particles are much closer to each other.

Gravity force is too weak to affect chemical reaction much. The gravity forces involves the interaction between two objects with energy and mass.

The electromagnetic force act between charged particles like negatively charged electron and positively charged proton. Electromagnetic force is the most important force in chemical bonding as it depends on the arrangement of atoms and the state of their electron. Electromagnetic forces exist in various forms like the covalent bond, metallic, ionic , dipole dipole, hydrogen bonds and many more. The major force involve in chemical bonding is the electromagnetic force.

Answer:

yes it chemical to electrical to radiant energy

Explanation:

correct

Answer:

Endothermic is identified if the process requires heat as a reactant, since endothermic means "intake of heat", so it has to take in some type of heat.

Explanation:

ionic compunds ............

NaOH: Sodium hydroxide            CaSO4: Calcium sulfate

NH4CN: Ammonium cyanide        Al2(SO4)3: Aluminum sulfate

The correct names for the given compounds are as follows:

Na: Sodium (atomic number 11)

OH: Hydroxide ion

Ca: Calcium (atomic number 20)

SO4: Sulfate ion

NH4: Ammonium ion

CN: Cyanide ion

Al: Aluminum (atomic number 13)

SO4: Sulfate ion

In sodium hydroxide (NaOH), sodium (Na) combines with hydroxide (OH) to form a strong base commonly known as lye or caustic soda. Calcium sulfate (CaSO4) is a white crystalline compound that is commonly known as gypsum.

NH4CN is a compound formed by the combination of ammonium (NH4) and cyanide (CN) ions. It is a toxic and highly reactive compound. Aluminum sulfate (Al2(SO4)3) is a white crystalline compound used in water treatment, dyeing, and paper manufacturing.

Remember, it is important to use caution and proper safety protocols when handling these chemicals, as some of them can be hazardous.

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