HURRY!! 30 points!!
In the process of photosynthesis, plants use carbon dioxide, water, and energy to form carbohydrates and oxygen Which of the following best explains how plants follow the Law of Conservation of Mass
The reaction uses energy to produce a product without energy
A gas (carbon dioxide) and a liquid (water) use energy to produce a solid (carbohydrates).
The amount of each element that begins photosynthesis equals the amount of each element that is produced
The amount of carbohydrates at the beginning of photosynthesis equals the amount of oxygen that is produced

Soaps clean up dirt by acting as emulsifying agents. The nonpolar chain in the soap is attracted to the dirt and the ionic end is attracted to the water. Thus, the soap creates b)dispersed droplets that wash the dirt away with the water.

In the field of chemistry, soap can be described as a washing material that is made by adding a base to a fat or oil.

As it contains fats and oils, soaps work by acting as an emulsifying agent.

The non-polar fats and oil absorb any kind of dirt and kill microorganisms.

When water is added to soap, the mixture acts as a dispersed droplet to absorb dirt particles in it. In this way, any kind of dust, microorganisms and dirt are removed.

The correct question format is:

Soaps clean up dirt by acting as emulsifying agents. The nonpolar chain in the soap is attracted to the dirt and the ionic end is attracted to the water. Thus, the soap creates ............. that wash the dirt away with the water.

a) floating bubbles

b) dispersed droplets

c)solid precipitate

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The percentage (w/v) of dextrose in the solution is approximately 1.9817%. To determine the percentage (w/v) of dextrose in a solution with a given osmolarity, we need to calculate the amount of dextrose present in 100 mL of the solution.

First, we convert the osmolarity from mosmol/L to mosmol/100 mL:

100 mosmol/L = 100 mosmol/100 mL

Next, we calculate the number of moles of dextrose present in 100 mL of the solution:

Number of moles = Osmolarity (in mosmol/100 mL) / 1000

Number of moles of dextrose = 100 mosmol/100 mL / 1000 = 1 mosmol/100 mL

Now, we can calculate the mass of dextrose present in 100 mL of the solution:

Mass of dextrose = Number of moles of dextrose * Molecular weight of dextrose

Mass of dextrose = 1 mosmol/100 mL * 198.17 g/mol = 1.9817 g/100 mL

Finally, we can calculate the percentage (w/v) of dextrose:

Percentage (w/v) = (Mass of dextrose / Volume of solution) * 100

Percentage (w/v) = (1.9817 g/100 mL / 100 mL) * 100 = 1.9817%

Therefore, the percentage (w/v) of dextrose in the solution is approximately 1.9817%.

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The lattice enthalpy (ΔHlattice) for KBr is 689.9 kJ/mol

To find the lattice enthalpy (ΔHlattice), we can use the following relation:

ΔHsolution = ΔHlattice + ΔHhydration

In this case, we are given the ΔHsolution (KBr) as +19.9 kJ/mol and the ΔHhydration (KBr) as -670 kJ/mol.

Plugging these values into the equation, we have:

19.9 kJ/mol = ΔHlattice + (-670 kJ/mol)

Now, we can solve for ΔHlattice by adding 670 kJ/mol to both sides of the equation:

ΔHlattice = 19.9 kJ/mol + 670 kJ/mol

ΔHlattice = 689.9 kJ/mol

So, the lattice enthalpy (ΔHlattice) for KBr is 689.9 kJ/mol. This value represents the energy required to separate one mole of solid KBr into its constituent gaseous ions.

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Answer:

1. Volume of osmium = 0.044 mL

2. Volume of Hydrogen = 11123.47 mL

3. Osmium is 251390 times denser than hydrogen

Explanation:

From the question given above, the following data were obtained:

Density of osmium = 22.6 g/mL

Density of Hydrogen = 8.99×10¯⁵ g/mL

Mass of osmium = 1 g

Mass of Hydrogen = 1 g

1. Determination of the Volume of osmium.

Density of osmium = 22.6 g/mL

Mass of osmium = 1 g

Volume of osmium =?

Density = mass /volume

22.6 = 1 / volume

Cross multiply

22.6 × volume = 1

Divide both side by 22.6

Volume = 1 / 22.6

Volume of osmium = 0.044 mL

2. Determination of the Volume of Hydrogen.

Density of osmium = 8.99×10¯⁵ g/mL

Mass of osmium = 1 g

Volume of osmium =?

Density = mass /volume

8.99×10¯⁵ = 1 / volume

Cross multiply

8.99×10¯⁵ × volume = 1

Divide both side by 8.99×10¯⁵

Volume = 1 / 8.99×10¯⁵

Volume of Hydrogen = 11123.47 mL

3. Determination of the number of times osmium is denser than hydrogen.

Density of osmium (Dₒ) = 22.6 g/mL

Density of Hydrogen (Dₕ) = 8.99×10¯⁵ g/mL

Dₒ / Dₕ = 22.6 / 8.99×10¯⁵

Dₒ / Dₕ = 251390

Cross multiply

Dₒ = 251390 × Dₕ

Thus, osmium is 251390 times denser than hydrogen.

The answer would be the round- bottom flask. When setting up the distillation setup and the round-bottom flask port serves as the water inlet.

As the round-bottom flasks is used for the boiling and also known as boiling flask.

Hence it permit the flask to have a uniform heating all over the process. The heat dispense equally in the entire process.

It is also called as RB flask.

Discovered by Emil Erlenmeyer and this equipment made from Pyrex glass.

Round-bottom flasks are the kind of flasks having spherical bottoms used as experimental glassware, generally used for chemical or biochemical work.

Hence, The port farthest from the RB flask.

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Answer:

I dont know if this is correct.. but maybe in the tool row, put graduated cylinder because you use graduated cylinders to measure water and for units put milliliters or liters?? Sorry if this isnt correct i wouldnt know what else to put !

Explanation:

Answer:

It would be B but gravity is not a fact it is a theory

Answer:

The second one

Explanation:

It the graph is correct, it has the most nuetrons

To determine the molarity of LiOH(aq) in the precipitation reaction between FeCl2(aq) and LiOH(aq), we can use the concept of stoichiometry and the volume and concentration information provided.

The balanced equation for the reaction is as follows:

FeCl2(aq) + 2LiOH(aq) → Fe(OH)2(s) + 2LiCl(aq)

From the balanced equation, we can see that 1 mole of FeCl2 reacts with 2 moles of LiOH.

First, let's calculate the number of moles of FeCl2 using the given volume and concentration:

Moles of FeCl2 = Volume of FeCl2(aq) * Molarity of FeCl2(aq)

= 0.0113 L * 0.210 mol/L

= 0.002373 mol

According to the balanced equation, 1 mole of FeCl2 reacts with 2 moles of LiOH. Therefore, the number of moles of LiOH that reacted can be calculated:

Moles of LiOH = (Moles of FeCl2) / 2

= 0.002373 mol / 2

= 0.0011865 mol

Now, let's calculate the molarity of LiOH(aq) using the volume of LiOH(aq) that reacted:

Molarity of LiOH(aq) = Moles of LiOH / Volume of LiOH(aq)

= 0.0011865 mol / 0.0343 L

= 0.0346 M

Therefore, the molarity of LiOH(aq) is 0.0346 M in the given precipitation reaction.

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The value of n from Huckel's rule for the aromatic compounds is a non-negative integer.

To determine the value of n from Huckel's rule for an aromatic compound, you should follow these steps:
1. Identify the compound as an aromatic compound. Aromatic compounds are planar molecules with a ring of atoms containing alternating single and double bonds, which follow Huckel's rule.
2. Apply Huckel's rule. Huckel's rule states that an aromatic compound has 4n + 2 π-electrons (where n is an integer value).

To determine the value of n from Huckel's rule for an aromatic compound, we need to first count the number of pi electrons in the compound. If the number of pi electrons is equal to 4n + 2, where n is a non-negative integer, then the compound is aromatic. Without knowing the specific aromatic compound in question, it is impossible to determine the value of n from Huckel's rule. However, if we know the number of pi electrons in the compound, we can use Huckel's rule to determine if it is aromatic and what value of n corresponds to it.

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Explanation

There are three main branches of science: physical science, Earth science and life science. Let's talk about each branch and the areas of study within each branch. Physical science is the study of inanimate natural objects and the laws that govern them.

Lead has 82 protons and 82 electrons.

Lead, with an atomic number of 82, indicates the number of protons in its nucleus. Therefore, lead has 82 protons. Since atoms are electrically neutral, the number of electrons in an atom is equal to the number of protons. Consequently, lead also has 82 electrons.

The protons, located in the nucleus, carry a positive charge, while the electrons, which orbit around the nucleus, carry a negative charge. The equal number of protons and electrons ensures that the overall charge of a lead atom is neutral.

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Answer:

the metal gets cold and week

Explanation:

It will take 120 years for the isotope cesium-137 which is is a product of nuclear power plants to decay to about one-sixteenth its original amount.

If the half-life of cesium-137 is 30 years, then it will take 30 years for half of the initial amount of the isotope to decay. After another 30 years (for a total of 60 years), half of what remained will decay, leaving one-fourth of the initial amount. After another 30 years (for a total of 90 years), half of what remained will decay again, leaving one-eighth of the initial amount. Finally, after another 30 years (for a total of 120 years), half of what remained will decay, leaving one-sixteenth of the initial amount. So, it will take 120 years for the isotope cesium-137 to decay to about one-sixteenth its original amount.

Note: It is important to handle radioactive isotopes like cesium-137 with care as they can be harmful to living organisms and the environment. Proper disposal and safety measures must be taken by power plants and other facilities that use these isotopes.

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Answer:

The answer is C, Glucose is a compound, because it is made of more than one element.

Explanation:

Complete Question is ;

The chemical formula for glucose, a type of sugar, is C₆H₁₂0₆. Which statement is true about glucose?

1) Glucose is a compound because it's made from more than 1 element

2) Glucose is an element because it's made up from more than one kind of atom.

3) Glucose is an element because it can be separated.

4) glucose is a compound because is made of protons, neutrons and electrons

Solution ;

The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)

Aan element made entirely of one species of atoms, or an atom which has a specific number of protons in its nucleus.

Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

Three substances make up glucose: carbon, hydrogen, and oxygen. They are set at a fixed ratio of 1:2:1.

Covalent bonds, in which two atoms share bonding valence electrons in one or more bonds, are used to bind these atoms together.

Therefore, The statement which is true about glucose is (1) Glucose is a compound because it's made from more than 1 element. Hence the correct option is (1)

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Answer:

the periodic table is G.

The periodic table has the elements placed in the locations that match the information on the flash cards is F.

The term "periodic table" refers to an arrangement of all known elements in order of increasing atomic number and recurrent chemical attributes. The periodic table is organized into 118 elements.

The term "periodic table" can also refer to a table that lists all known chemical elements in rows and columns.

In the F table, L is found in alkaline earth metals while M is found in transition metals. M has more valence electrons than L, while L is more reactive than M.

Thus, the  periodic table has the elements placed in the locations that match the information on the flash cards is F.

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Answer:

Cassiterite is an ore of Sn.It is also called tinstone and has molecular formula of SnO

2 . It is heavy, metallic, hard tin dioxide that is the major ore of tin. It is colourless when pure, but brown or black when iron impurities are present.

Answer:

A. a wild dog that finds and mates with a domestic dog.

Explanation:

Answer:

20

Explanation:

Hi there!

We need to find the atomic number of an atom that has 20 protons and 20 neutrons

the atomic number of an atom is equivalent to the amount of protons an atom has, as the number of protons determines what element an atom is.

Since the atom has 20 protons, the atomic number of the said atom is 20

Hope this helps!  

Filtration is a separation method used to separate out pure substances in mixtures comprised of particles some of which are large enough in size to be captured with a porous material. Particle size can vary considerably, given the type of mixture.

Evaporation is a technique used to separate out homogeneous mixtures that contain one or more dissolved salts. This process drives liquid components out of solid components. This process usually heats the mixture until the liquid is gone.

Distillation is an effective method of separating mixtures of two or more pure liquids. Distillation is a purification process that vaporizes, condenses, and separates the components of a liquid mixture.

Chromatography is the separation of a mixture by passing it in solution or suspension, or as a vapor through a medium in which the components move at different rates. Thin-layer chromatography is a special type of chromatography used for separating and identifying mixtures that are or can be colored especially pigments.

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They are the most common type of bond in organic molecules. These bonds are important in biological systems, as they hold the molecules of life together. They are typically strong and difficult to break, making them important in the structure of large molecules such as proteins and DNA.

2. An atom found in the human body (both its common name and the atomic symbol): An example of an atom found in the human body is Carbon.

Its atomic symbol is C.3. Ion:

An ion is an atom or molecule that has an unequal number of protons and electrons. It can be negatively charged (anion) or positively charged (cation).4. An ion found in the human body (both its common name and its symbol): An example of an ion found in the human body is Sodium. Its symbol is Na, and it has a positive charge (cation).5. Covalent bonds: Covalent bonds are chemical bonds that are formed when two atoms share a pair of electrons. They are the most common type of bond in organic molecules. These bonds are important in biological systems, as they hold the molecules of life together. They are typically strong and difficult to break, making them important in the structure of large molecules such as proteins and DNA.

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Answer:

6.

Explanation:

2 sodium

1 silicon

3 oxygen

--------------

6 atoms

The reaction for given equation is 2NaOH + H₂SO₄⟶ Na₂SO₄ + 2H₂O . It is a neutralization reaction and double displacement reaction.

Option B is correct .

A balance response is the point at which a corrosive and a base respond to frame water and a salt and includes the mix of H+ particles and Gracious particles to create water. The pH at which a strong acid and strong base are neutralized is 7. A chemical reaction known as neutralization involves the quantitative interaction of an acid and a base. In a response in water, balance brings about there being no overabundance of hydrogen or hydroxide particles present in the arrangement.

The majority of double displacement reactions take place in aqueous solutions, where ion exchange and precipitation occur. For instance, when an answer of barium chloride is blended in with sodium sulfate, a white hasten of barium sulfate is shaped quickly. The nature of these reactions is ionic.

Incomplete question :

Write complete balanced equation and explain what kind of reaction is taking place ?

2NaOH + H₂SO₄⟶

Above equation is a

(i) neutralization reaction

(ii) double displacement reaction

(iii) decomposition reaction

(iv) addition reaction

A. iii and iv

B. i and ii

C. i and iii

D. ii and iv

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Answer:

So, if a rock is changed or broken but stays where it is, it is called weathering. If the pieces of weathered rock are moved away, it is called erosion.

Taking into account the definition of percentage composition, the percent composition of carbon in this sample is 62.17%.

The Percentage Composition is a measure of the amount of mass that an element occupies in a compound and indicates the percentage by mass of each element that is part of a compound.

Then, the percentage by mass expresses the concentration and indicates the amount of mass of solute present in 100 grams of solution.

In other words, the percentage by mass of a component of the solution is defined as the ratio of the mass of the solute to the mass of the solution, expressed as a percentage.

The percentage by mass is calculated as the mass of the solute divided by the mass of the solution, the result of which is multiplied by 100 to give a percentage. This is:

\(percentageby mass= \frac{mass of solute}{mass of solution}x100\)

In this case, you know:

Replacing:

\(percentageby mass= \frac{46.63 g}{75 g}x100\)

Solving:

percentage by mass= 62.17 %

Finally, the percent composition of carbon in this sample is 62.17%.

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Answer:

because electron is a negetively charge particle that orbits the outer part of atom and despite being small it is a strong proton.

Explanation:

Answer:

Heating raw potatoes in hot water will make the starch granule swell and absorb water, becoming soft and easier to digest. Eggs contain mostly protein in liquid form. Heating protein will make it undergo denaturation process. The protein structure changes, becoming firm solid and easier to digest.

Cobalt (Co) is a transition metal element that is present in every cell of the human body in Vitamin B12.

The ground-state electronic configuration of the cobalt atom, present in the human body, is A: 1s2 2s22p6 3s2 3p6 4s2 3d7.

The electron configuration for the Co2+ ion is B: 1s2 2s22p6 3s2 3p6 3d7,

and the electron configuration for the Co4+ ion is C: 1s2 2s22p6 3s2 3p6 3d5.

The noble gas that may be used to abbreviate and shorten these configurations is Argon.

The possible explanation for the electronic configuration of Co3+ is the A. half-filled orbitals.

Explanation:

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