Consider the structure of vitamin a1 c.o't''e~'ll (c2oh3oo). vitamin a1 should be:________

Answer:

Alkaline earth metals

Explanation:

The independent variable is the temperature and dependent variable is solubility , controlled variables are mass and if temperature is increased solubility increases.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer:

B

Explanation:

1 and 2

Answer:

I think 2 and 3 possibly!

Explanation:

A drop of ink will spread faster as higher the temperature is. The higher the temperature, the more agitated the molecules will be, so they will move faster. So the mobility of the particles is related to their temperature.

So:

Particles in Flask C show the greatest mobility of the particles, this flask will have the highest temperature.

Particles in Flask A show the least mobility, this flask will have the lowest temperature.

Answer:

Flask A 10°C

Flask B 25 °C

Flask C 50 °C

The mobility of the particles is related to their temperature. The particles in Flask A show the least mobility, and the particles in Flask C show the greatest mobility.

1.8 × 1024 atoms  fluorine atoms are there in 65 g of CF4 ,The smallest part of a substance that cannot be broken down chemically.

Atoms consist of three fundamental types of particles, protons, electrons and neutrons. Neutrons and protons have approximately the same mass and in contrast to this the mass of an electron is negligible. A proton carries a positive charge, a neutron has no charge and an electron is negatively charged.

Atoms are constructed of two types of elementary particles: electrons and quarks. Electrons occupy a space that surrounds an atom's nucleus. Each electron has an electrical charge of -1. Quarks make up protons and neutrons, which, in turn, make up an atom's nucleus.

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Molarity of the solution 0.2278 M.

Concentration of the aluminum cation  0.2278 M.

Concentration of the chloride anion  0.6834 M.

Molarity is the total number of moles of solute dissolved in 1 liter solution. The unit used is mol/L.

Here,

Aluminium chloride (AlCl₃; 133.34 g/mol) dissolves in water thus:

The balanced equation (I) will be: AlCl₃--> Al₃ + 3.Cl

Molarity is an unit of chemical concentration given in moles of solute (AlCl₃) per liters of solution.

There are 500 mL of solution=0.50 L

The moles of AlCl₃ are:

15.2 g of AlCl₃ × (1 mol/133.34) = 0.1139 moles of AlCl₃

The molarity of the solution is: moles/volumes

= 0.2278 M

In equation (I) you can see that 1 mole of AlCl₃ produces 1 mole of aluminum cation. The mole of potassium cation are:

0.1139 moles × 1 = 0.1139 moles

The concentration is: 0.1139/0.50

= 0.2278 M

According to the equation (I) the moles of AlCl₃ produces 3 moles of Cl, thus, concentration of phosphate anion is

= 0.1139 moles × 3 = 0.3417

Concentration : 0.3417/0.50L

= 0.6834

Hence,

the molarity of the solution = 0.2278 M

the concentration of aluminum cation = 0.2278 M

the concentration of chloride anion = 0.6834 M

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Note that the formula for momentum is P = mv, where P is momentum, m is mass, and v is velocity. This being said, simply apply the given data into the formula to find our solution.

\(P=mv\)

\(P=0.4\) × \(19.0\)

\(P = 7.6 kg *m/s\)

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The automobile gasoline tank will hold 59.05 pounds of gasoline.

Given that the volume of the gasoline tank of the automobile is 19.0 gal. and the density of the gasoline is 0.737 g/mL. So, we need to calculate the number of pounds of gasoline the tank can hold.The relationship between volume and density is as follows;Density= Mass/ VolumeRearranging the equation gives; Mass= Density × VolumeSubstitute the given values in the above equation;Mass = 0.737 g/mL × 19.0 gal × 3.78541 L/galWe know that; 1 L = 1 dm³Thus,Mass = 0.737 g/mL × 19.0 gal × 3.78541 dm³/LMass = 53.70 kgThe given mass is in kg and we need to convert it into pounds;1 kg = 2.20462 poundsThus,Mass = 53.70 kg × 2.20462 pounds/kgMass = 118.4 pounds therefore, the automobile gasoline tank will hold 59.05 pounds of gasoline.

Given that the volume of the gasoline tank of the automobile is 19.0 gal. and the density of the gasoline is 0.737 g/mL. So, we need to calculate the number of pounds of gasoline the tank can hold.The relationship between volume and density is as follows;Density= Mass/ VolumeThe above equation can be rearranged as; Mass= Density × Volume Substitute the given values in the above equation;Mass = 0.737 g/mL × 19.0 gal × 3.78541 L/galMass = 53.70 kgThe given mass is in kg and we need to convert it into pounds;1 kg = 2.20462 poundsThus,Mass = 53.70 kg × 2.20462 pounds/kgMass = 118.4 pounds therefore, the automobile gasoline tank will hold 59.05 pounds of gasoline.

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Answer:

A parasite.

Explanation:

A virus usually invades cells and replicates.

A bacteria usually just replicates and either is beneficial or can harm.

A fungus usually decomposes or can make you sick.

A parasite usually is parasitism - it invades the organisms and leeches off them for shelter and nutrients and can harm.

Answer:

A parasite.

Explanation:

i got it right

12 moles of CO2 would be made up of 12 moles × Avogadro's number of CO2 molecules.

Avogadro's number is the number of atoms, ions, or molecules in one mole of a substance. It is defined as 6.022 x 10²³ particles per mole. It is named after Amedeo Avogadro, an Italian scientist who proposed the concept of the Avogadro's number in 1811. Avogadro's number is used in chemistry and physics to convert between moles, mass, and number of atoms, ions or molecules. It is a fundamental constant of nature, used in various calculations such as molar mass, chemical stoichiometry, and ideal gas law calculations.

The student wants to determine the number of particles in 12 moles of Carbon dioxide, the formula for carbon dioxide is CO2, which means that each molecule of CO2 having been made with one atom of carbon and two atoms of oxygen. Therefore, 12 moles of CO2 would be made up of 12 moles × Avogadro's number of CO2 molecules.

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The quantity of this pattern whilst the temperature is modified to one hundred fifty. K and the pressure are changed to 160. Kilopascals is 52.5 mL.

The calculation is as follows:

\(\frac{240kPa \times 70 mL}{300K} = \frac{160kPa\timesV2}{150K}\\\\ V2 = \frac{150K}{1600KPa} \times \frac{240kPa \times 70 mL}{300K}\)

So, the Volume is 52.5 mL.

Temperature is measured with a thermometer. Temperature is essential in all fields of natural science, which includes physics, chemistry, Earth technology, astronomy, remedy, biology, ecology, material technology, metallurgy, mechanical engineering, and geography in addition to maximum elements of day-by-day lifestyles.

Thermometers are calibrated in diverse temperature scales that traditionally have depended on various reference factors and thermometric materials for definition. The most not unusual scales are the Celsius scale with the unit image °C (previously called centigrade), the Fahrenheit scale (°F), and the Kelvin scale (ok), the latter getting used predominantly for medical purposes. The kelvin is one of the seven base units within the international system of devices (SI).

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Answer:

Total cost = $40.25 (Approx)

Explanation:

Given:

Per ounce = $1.15

Number of student = 28

Each student eat = 0.035 kg

Find:

Total cost

Computation:

Total weight of candy = 28 × 0.035 kg

Total weight of candy = 0.98 kg

1 ounce = 0.028 kg (approx).

Total weight of candy = 0.98 kg / 0.028

Total weight of candy = 35 ounce (Approx)

Total cost = 35 × $1.15

Total cost = $40.25 (Approx)

Answer:

the two major sources of energy for the rock cycle are also shown; the sun provides energy for surface processes such as weathering, erosion, and transport, and the Earth's internal heat provides energy for processes like subduction, melting, and metamorphism.

The enthalpy change when 1 mole of gaseous atoms is formed from elements in its standard state is called the enthalpy change of atomization.

It is defined as the enthalpy change that occurs when one mole of a substance in its standard state is converted into gaseous atoms at the same temperature and pressure. This process requires the input of energy, which is typically provided by heat. The enthalpy change of atomization is usually expressed in units of kilojoules per mole (kJ/mol).

For example, the enthalpy change of atomization for chlorine gas is +121 kJ/mol. This means that it takes 121 kilojoules of energy to convert one mole of chlorine gas into gaseous chlorine atoms at standard temperature and pressure.

This process involves breaking the bonds between the atoms in the elements and forming new bonds between the individual atoms to create the gaseous atoms. The enthalpy change associated with this process is a measure of the energy required to break the bonds and the energy released when the new bonds are formed.

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The atomic number of rubidium is 37, it means that its electron configuration is as follows:

Rubidium is an alkali metal. Its ion is formed when it loses an electron. It means that the rubidium ion has 36 electrons instead of 37, and its configuration is as follows:

Answer: D

Explanation:

Water is comprised of 2 Hydrogen atoms and 1 Oxygen atom. This gives us a total of 8 valence electrons to form bonds with.

Because Hydrogen is in first row of elements it can only hold a total of two electrons. This means each Hydrogen holds 2 electrons.

But that means there are four more electrons. VSEPR theory is basically how electron repulsion causes atoms to arrange in different ways.

There will be four electrons left on the oxygen because they can not go anywhere else. This will cause the hydrogen molecules to move away from the lone electrons and cause a bent geometry rather than a straight-line geometry.

Answer:

You'll find someone. There's a someone for everyone.

Explanation:

And I know how you feel.

Yes, the polymerization of ethylene units will result in the polymer polyethylene.

Polyethylene is a common thermoplastic polymer made from the polymerization of ethylene monomer units. Ethylene (C₂H₄) has a double bond between the carbon atoms, which can be broken under certain conditions to form new single bonds. When many ethylene molecules undergo this reaction, they can polymerize into long chains of polyethylene molecules.

The resulting polyethylene polymer has a high molecular weight and is a widely used plastic material due to its properties such as strength, flexibility, and chemical resistance.

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a solution  containing 2.50 mol of Mg2+ ions has 5.00 equivalents of Mg2+ ions.

Magnesium ion (Mg2+) has a charge of 2+, which means that each Mg2+ ion is equivalent to two moles of Mg2+ ions. Therefore, to determine the number of equivalents of Mg2+ in a solution containing 2.50 mol of Mg2+ ions, we need to multiply the number of moles by the number of equivalents per mole, which is 2.

Number of equivalents of Mg2+ = Number of moles of Mg2+ x Number of equivalents per mole
Number of equivalents of Mg2+ = 2.50 mol x 2
Number of equivalents of Mg2+ = 5.00 equivalents

Therefore, a solution  containing 2.50 mol of Mg2+ ions has 5.00 equivalents of Mg2+ ions.

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Answer:

the second one would have lower

Explanation:

because of the amount

pH is the measure of the negative log of the hydrogen ion concentration. The 0.4 M nitric acid will have lower pH.

pH is the concentration of the hydronium or the hydrogen ion in the water that gives the account to the basic and acidic nature of the substance.  

pH is dependent on the concentration of the substance as the increased concentration increases the pH while the lower concentration lowers the pH.

Therefore, 0.4 M will have a lower concentration.

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Answer:

The correct option is;

D Global warming would decrease the surface tension of water, making it harder for water striders to walk on water

Explanation:

Global warming involves the heating of the ecosystems on Earth due to human activity, which results in rising temperatures

As the temperature of the water rises due to global warming the surface tension decreases due to the increasing ratio of the force of higher kinetic energy water molecule to inter-molecular cohesive forces pulling the water together, which tends to weaken the effect of the cohesive forces and thus reduce the surface tension

As the surface tension has been reduced, the water striders will find it difficult to walk on the water surface as the maximum weight the water surface can lift without shearing, due to surface tension is reduced.

Answer:

Kinetic energy is transferred from the leg to the ball

Explanation:

Before kicking the ball, you'll need to run to where the position of the ball is which implies that your leg is not at rest, immediately you kick the ball, you will be transferring the kinetic energy of your leg to the ball.

Explanation:

It is given that,

Water flows over Niagara Falls at the average rate of 2,400,000 kg/s

The average height of the falls is 50 m

We need to find the power of Niagara Falls.

The gravitational potential energy of falling water is given by :

P = mgh

Power is rate of doing work i.e.

\(P=\dfrac{W}{t}\\\\P=\dfrac{mgh}{t}\\\\P=\dfrac{m}{t}\times gh\)

We have, m/t =  2,400,000 kg/s

So,

\(P=2400000\times 9.8\times 50\\\\P=1.176\times 10^9\ W\)

If the number of bulbs are n that could power 15 W LED, the,

\(n=\dfrac{1.176\times 10^9}{15}\\\\n=78400000\ \text{bulbs}\)

The concentration of A decreases and then levels out. Option A

In many chemical reactions, a reactant is consumed as the reaction progresses, leading to a decrease in its concentration over time. The reactant molecules are transformed into products, and as the reaction proceeds, the concentration of the reactant gradually diminishes.

At equilibrium, the concentrations of both reactants and products remain relatively constant over time, although they can coexist.

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Approximately 12.45 grams of solid silver chromate will precipitate when 150 mL of 0.500 M silver nitrate solution is added to excess potassium chromate.

To determine the number of moles of AgNO3 present in 150 mL of a 0.500 M AgNO3 solution, we can use the formula:

moles = concentration × volume

Given:

Concentration of AgNO3 solution = 0.500 M

Volume of AgNO3 solution = 150 mL

First, we need to convert the volume from milliliters (mL) to liters (L) since the concentration is given in moles per liter (M).

1 L = 1000 mL

Therefore, the volume of the AgNO3 solution in liters is:

150 mL × (1 L / 1000 mL) = 0.150 L

Now we can calculate the moles of AgNO3 using the formula:

moles = concentration × volume

moles = 0.500 M × 0.150 L

moles = 0.075 mol

So, there are 0.075 moles of AgNO3 present in 150 mL of the 0.500 M AgNO3 solution.

Now, let's proceed to determine how many grams of solid silver chromate (Ag2CrO4) will precipitate when the AgNO3 solution reacts with excess potassium chromate (K2CrO4).

From the balanced chemical equation:

2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)

We can see that the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Therefore, for every 2 moles of AgNO3, we will form 1 mole of Ag2CrO4.

Since we have 0.075 moles of AgNO3, we can calculate the moles of Ag2CrO4 formed:

moles of Ag2CrO4 = 0.075 mol / 2 = 0.0375 mol

To determine the mass of Ag2CrO4, we need to multiply the moles by its molar mass. The molar mass of Ag2CrO4 is calculated by summing the atomic masses of each element in the compound:

Ag2CrO4 = 2(Ag) + 1(Cr) + 4(O) = 2(107.87 g/mol) + 1(52.00 g/mol) + 4(16.00 g/mol) = 331.87 g/mol

mass of Ag2CrO4 = moles of Ag2CrO4 × molar mass of Ag2CrO4

mass of Ag2CrO4 = 0.0375 mol × 331.87 g/mol = 12.45 g

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Answer:

(simple differences)Biodegradable substances are those that degrades or break down naturally...

Non-biodegradable substances are those that do not degrades easily...

Answer:

Biodegradable substances are those that degrades or break down naturally

Non-biodegradable substances are those that do not degrades easily

Answer:

37

Explanation:

because when an element is neutral it contains thesame amount of protons and electrons.

The number of protons in the given neutral atom is 37.

Explanation:

Given:

A neutral atom with 37 electrons

To find:

The number of protons.

Solution:

Number of electrons = 37

The given atom is neutral, which means that an equal number of protons and electrons are present.

Number of protons = 37

The number of protons in the given neutral atom is 37.

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The correct order of the increasing polarity of the analyte functional group isEthers < Esters.

The given statement is "Polarities of analyte functional group increase in the order of hydrocarbon ethers < esters."  The order of polarities of functional groups is the order of their increasing polarity (i.e., less polar to more polar) based on their electron-donating or withdrawing ability from the rest of the molecule.Polarity of analyte: The analyte's polarity is directly proportional to the dipole moment of the functional group, which is associated with a difference in electronegativity between the atoms that make up the functional group.The electronegativity of an element is its ability to attract electrons towards itself. The greater the difference in electronegativity between two atoms, the more polar their bond, and hence the greater the polarity of the molecule.

To find the correct order of the increasing polarity of the analyte functional group, let's first compare the two groups: hydrocarbon ethers and esters. Here, esters have a carbonyl group while ethers have an oxygen atom with two alkyl or aryl groups. The carbonyl group has more electronegative oxygen, which pulls electrons away from the carbon atom, resulting in a polar molecule. On the other hand, ethers have a less polar oxygen atom with two alkyl or aryl groups, making them less polar than esters. Therefore, the correct order of the increasing polarity of the analyte functional group isEthers < Esters.

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