Which shows a monosaccharide?

24 molecules of H2O are needed by the plant to produce 4 molecules of sugar.

The process by which plants convert carbon dioxide, water, and sunlight into oxygen and sugar-based energy is known as photosynthesis.

                   6CO2 + 6H2O + Sunlight → C6H12O6 + 6O2

The following three significant activities are involved in photosynthesis:

1. Chlorophyll absorbs light energy.

2. Water molecules are divided into hydrogen and oxygen and light energy is converted to chemical energy.

3. Carbon dioxide is converted to sugars.

Therefore, a plant needs four molecules of H2O and four molecules of CO2 to make one molecule of glucose or sugar, hence a plant needs 24 molecules of H2O and 24 molecules of CO2 to make four molecules of sugar.

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Answer:

D) 24 molecules of H2O

Explanation:

Just did the test on Edge 2023 and got it right. Have a nice day :)

Heating up a reaction increases the speed of a reaction until the enzyme denatures.

Enzyme denaturation occurs when a biological protein catalyst does not work anymore due to a high temperature that alters its tridimensional conformation.

This cellular process (denaturation) is well known to be one of the main causes of enzymatic failure.

In conclusion, heating up a reaction increases the speed of a reaction until the enzyme denatures.

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The change in enthalpy for the reaction per mole is -130KJ/mol.

Given,

Reaction: MgO(s) + 2HCl (aq) →MgCl₂ (aq) + H₂O (l)

1.32 g MgO is combined with 100.0 mL of 1.00 M HCl in the cup of coffee.

Change in temperature, ΔT=34.4 °C-24.2 °C =10.2°C

Specific heat of the HCl solution, c= 4.18 J/g·°C

Density= 1.00 g/mL

Mass can be written as the product of density and volume.

Mass= Density × Volume= 1g/ml × 100 ml=100g

Heat can be written as

Heat, Q=mcΔT=100g×4.18 J/g·°C×10.2°C=4263.6J

Number of moles of the MgO,

n= (mass of MgO)/(Molar mass)= 1.32g/(40.3g/mol)= 0.03275 mol

Change in Enthalpy, ΔH=-Q/(n)=(-4263.6J)/(0.03275 mol)

ΔH= -1300186J/mol= -130KJ/mol

Hence, the change in enthalpy for the reaction per mole is -130KJ/mol.

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Answer:

Explanation:

Solution

Verified by Toppr

2 molL

−1

Explanation :

Concentration =

Volume of solution

Moles of solute

We assume that potassium nitrate dissolves in the given volume of solvent without gross change in volume.

Concentration =

101.10gmol

−1

404g

Carbon monoxide blocks oxygen in the blood. Hence, option A is correct.

Combustion is a chemical process or a reaction between Fuel (Hydrocarbon) and Oxygen.

During incomplete combustion part of the carbon is not completely oxidized producing carbon monoxide (CO). Incomplete combustion uses fuel inefficiently and carbon monoxide is released.

Carbon monoxide gas diffuses rapidly across the pulmonary capillary membrane, binding to haemoglobin with an affinity 200 times that of oxygen to form carboxyhemoglobin. By displacing oxygen, CO decreases the oxygen-carrying capacity and oxygen delivery to tissues, causing marked cellular hypoxia and acidosis.

Hence, option A is correct.

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The correct answer to this question is option A.

[tex](115.00)(0.25)+(117.00)(0.75)=\boxed{116.50 \text{ u}}[/tex]

The most abundant isotope among the given Isotopes will be Isotope B

To calculate the percent abundance of each isotope in a sample of an element, we usually divide the number of atoms of a particular isotope by the total number of atoms of all isotopes of that element and then multiply the result by 100.

% Abundance =  15/50 x 100

                        =  30 %

% Abundance =  30/50 x 100

                        =  60 %

% Abundance =  5/50 x 100

                        =  10 %

Hence, The most abundant isotope among the given Isotopes will be Isotope B.

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Answer:

Sample A=40 Sample B=50

Explanation:

32+48=80

32/80x100=40

The 100 is to convert it to a percentage

___________________________

Sample B

same thing

30+30=60

30/60x100=50

The mass percent of sulfur in compound B is 50 %

Mass percent is defined as a way of expressing a concentration or describing the component in a particular mixture.

It can also be defined as a mass of a element or solute divided by the mass of compound or solvent.  

Mass percent of sulfur of sample A

= 32 + 48 = 80

= 32 / 80 x 100

= 40 %

Mass percent of sulfur of sample B

= 30 + 30 = 60

= 30 / 60 X 100

= 50 %

Thus, the mass percent of sulfur in compound B is 50 %

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Answer:

n

Explanation:

nobody knows

Answer: O

Explanation:

Out of the given elements, oxygen has the highest electronegativity.

The molarity of the unknown solution will be 1.310 M.It is denoted by M₂.

Molarity is defined as the ratio of the moles to the volume of the solution.

Given data;

Volume of unknown solution,V₁ = 10.5 mL

The volume of diluted solution,V₂ = 80.0 mL

Molarity of new solution,M₁ = 0.172 M

Molarity of unknown solution, M₂=?

For dilution we use the formula as;

M₁V₁=M₂V₂

M₂=M₂V₂/V₁

M₂ = ( 80 × 0.172 ) / 10.5

M₂= 1.310 M

Hence the molarity of the unknown solution will be 1.310 M.

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Answer:

C

Explanation:

a, b and d   are physical properties ..... the compound or element in question has not changed its identity

   c    when combined with oxygen, it has changed to a different compound via CHEMICAL property.

Answer:

8.3 g of NaCl

Explanation:

Edge 2022

Answer:

8.3 g NaCl

Explanation:

Its right just type it in

Answer:

Ionic bonding happens when an atom of an element gives one or more of its electrons to the other element's atom..it usually takes place between metal and non metal atoms...like in NaCl, Na gives its valence electron to chlorine and completes its own octet. Chlorine accepts the electron and completes its own octet too...but now both the atoms have an opposing charge and hence they attract each other to form an IONIC bond.

Ionic bonds are the strongest of the bonds...here complete transfer of electrons takes place unlike covalent bonds.

HOPE IT HELPED..

:)

Answer:

The electrostatic interaction between an anion and cation

The type of scientist would most likely study how the size of the lemming population affects the size of the snowy owl population is a biologist.Thus, the correct option is (D)

Biologists study humans, plants, animals, and the environments in which they live.

They may conduct their studies--human medical research, plant research, animal research, environmental system research--at the cellular level or the ecosystem level or anywhere in between.

Hence, The type of scientist would most likely study how the size of the lemming population affects the size of the snowy owl population is a biologist.Thus, the correct option is (D)

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The quantum numbers are used to describe the position of an electron in atom.

The quantum numbers are used to describe the position of an electron in atom. I have attached a picture that shows the complete question.

For the 1s orbital;

n =1

l = 0

ml = 0

ms = ±1/2

For the 2s orbital;

n = 2

l = 1

ml = -1, 0, 1

ms = ±1/2

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Answer:

A.

Explanation:

Well, Nicola Tesla was from Croatia.

Albert Einstein was from Germany.

Thomas Edison was from the U.S.

So I think all over.

All liquids evaporate if exposed to certain elements.

Evaporation is the process by which water changes from a liquid to a gas or vapor.

Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor.

All liquids evaporate if exposed to certain elements.

The rate at which a liquid evaporates depends on its molecular structure.

The other factors that affect evaporation are surface area, temperature and air movement.

We can also do a few fairly simple experiments to demonstrate the effect that the various factors have on the rate of evaporation.

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Answer:

15 grams of water will absorb 2,500 Joules  in going from 20.0 to 60.0 C.

Explanation:

The heat involved in raising a mass (m) of a substance with a specific heat (c) from one temperature to another (Delta T) is given by:

Heat = mc(Delta T)

2,500 Joules = m*(4.186J/gC)*(60C-20C)

2,500 Joules = m*(4.186J/gC)*(40C)

2,500 Joules = m*(4.186J/gC)*(40C)

m = (2,500J)/(4.186*40J/g)

m = 14.93 grams

Answer: B (15g)

Explanation:

[tex]\quad \huge \quad \quad \boxed{ \tt \:Answer }[/tex]

[tex]\qquad \tt \rightarrow \:36 \:\: g [/tex]

____________________________________

[tex] \large \tt Explanation \: : [/tex]

The given compound has 3 carbon atoms, so in 1 mole of that compound, there will be 3 moles of carbon atoms.

Mass of each mole of carbon atoms = 12 g

For 3 mole carbon atoms, it will be 12 × 3 = 36 grams

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

Answer:

CO_(2)` molecules removed `= 10^(21)` <br> No. of `CO_(2)` molecules left `= 2.74 xx 10^(21) - 10^(21) = 1.74 xx10^(21)` <br>

Explanation:

Mole and dozen are similar to each other because of the presence of number 12 in both measurements.

The sample of 12 grams of carbon is equal to its one mole and we know that in one dozen, there are 12 numbers. Therefore, we considered mole similar to a dozen.

So we can conclude that Mole and dozen are similar to each other because of the presence of number 12 in both measurements.

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The earth's mantle will not change in the future because this region is safe from the intervention of human beings.

The transfer of heat and material in the mantle helps us to determine the landscape of Earth. Activity in the mantle moves the plate tectonics, that contributes to volcanoes, seafloor spreading, earthquakes, and building of mountains.

So we can conclude that the earth's mantle will not change in the future because this region is safe from the intervention of human beings.

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Answer:

the number off double bonds in a fatty acid chain

Answer:

b) Product

c) Combustion

c) speeds up the rate of reaction

Explanation:

the substance produced by a chemical reaction is called a product (b)

Combustion (c) reactions are involving oxygen and "another substance" [and hydrocarbons] to produce carbon dioxide and water.

A catalyst acts to speed up the rate of a reaction (c)

 > note how it "speeds up" reaction: , it [a catalyst] lowers the pressure or temperature needed to start one--but it isn't used/consumed in the reaction

So, the answers are: b, c, c

hope this helps!!

Answer:

1.1713 moles

Explanation:

RFM of N2O5= (14*2)+(16*4)=108

Moles of N2O5= Mass/RFM= 63.25/108= 0.5856 moles

Mole ratio of N2O5:NO2 = 2:4

Therefore moles of NO2= 4/2*0.5856= 1.1713 moles

Noble gases exist as monatomic gases, which means that their molecules consist of a single atom.

A "Noble gas" can be defined as a gas which does not undergo chemical reactions. Examples of Noble gases are helium, Neon, Argon, Krypton, Xenon, and Radon.

Properties of noble gases:

Noble gases are the least reactive of all elements because they have eight valence electrons, which fill their outer energy level. That's why noble gases rarely react with other elements and form compounds.

Atoms of noble gases do not bond with other gases. Only helium exists as atoms of Helium, not as diatomic molecules. Helium does not form compounds with atoms of other elements.

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Answer:

C. It has the same types of atoms on both sides of the reaction arrow.

A chemical equation is a symbolic representation of a chemical reaction; Reactants are represented on the left and the products on the right.

The law of conservation of mass states that in a closed system, mass is neither created nor destroyed during a chemical or physical reaction. The law of conservation of mass is applied whenever you balance a chemical equation. It is also applicable to stoichiometry. A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow.

Consider the balanced equation for the combustion of methane.

[tex]CH_4 + 20_2 \implies CO_2 + 2H_2O[/tex]

All balanced chemical equations must have the same number of each type of atom on both sides of the arrow.

In this equation, we have 1 C atom, 4 H atoms, and 4 O atoms on each side of the arrow.

The number of atoms does not change, so the total mass of all the atoms is the same before and after the reaction. Mass is conserved.

The same atoms of the same element that are present in the reactants are also present in the products, according to the rule of conservation of matter.

This leads us to believe that the response to the question is true because: It has the same atom kinds on both sides of the reaction arrow (Option C)

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Answer:

B. the reaction absorbs energy (+ or endothermiic)