The rate of action of the enzyme protease is affected by:.

Answer:

B

Explanation:

After two or more atoms lose or receive electrons to create an ion, an ionic bond can occur. Ionic bonds form when metals lose electrons and nonmetals acquire electrons. Ions with opposing charges attract one other, forming an ionic connection.

Ionic bonding is the principal interaction in ionic compounds and includes the electrostatic attraction between oppositely charged ions or between two atoms with drastically differing electronegativities. Ionic bond, also known as electrovalent bond, is a kind of connection generated in a chemical molecule by the electrostatic attraction of oppositely charged ions. When the valence (outermost) electrons of one atom are permanently transferred to another, a bond is formed.

Here,

An ionic link can form when two or more atoms lose or gain electrons to form an ion. When metals lose electrons and nonmetals gain electrons, ionic bonds develop. Ions having opposing charges attract one another, resulting in the formation of an ionic bond.

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SN

1:1

So lf you multiply N with 4 you have to multiply the s with the same number

the answer Will be sS4N4

easy

The salt produced in the neutralization reaction between NH₄OH and HNO₃ is NH₄NO₃ (ammonium nitrate).

A neutralization reaction is a reaction between an acid and a base to form salt and water. The cation of the salt will come from the base while its anion will come from the acid.

Let's consider the neutralization reaction between NH₄OH and HNO₃. The formed salt will be ammonium nitrate.

NH₄OH + HNO₃ ⇒ NH₄NO₃ + H₂O

The salt produced in the neutralization reaction between NH₄OH and HNO₃ is NH₄NO₃ (ammonium nitrate).

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Answer:

(1) The outermost shell should have Eight electrons to complete or called as  octet and attain stability.  

(2) Hydrogen and Chlorine share Electrons with each other and form Covalent bonding.

(3) Hydrogen forms an octet by obtaining an electron, and Helium is the only element that has an octet with two electrons.

(4) The octet rule states that an atom should attain eight electrons in the outermost shell to get stability, However we have exceptional like Hydrogen and helium.

(5) In Ionic bond there is a formation of Ions of the elements in a compound, like in NaCl there will be Na+ and Cl-.

(6) While in Covalent bond there is sharing of electron between the atoms included like O2.

(7) In ionic bond there is an electrostatic force of attraction while in Covalent bond the is a mutual sharing of electrons.  

Answer:

pretty sure -10 degrees

Explanation:

no explanation

Covalent bonds within water molecules are stronger than hydrogen bonds between them.

A covalent bond is a sort of chemical link created when two or more atoms share electrons. In a covalent bond, the atoms share electrons in order to complete their valence shells, creating a stable and powerful link.

In water molecules, there are two basic kinds of chemical bonding: covalent bonds and hydrogen bonds. Between the hydrogen atoms of one water molecule and the oxygen atom of another water molecule, hydrogen bonds are created. Compared to covalent bonds, they are relatively weak interactions, yet they are potent enough to have a significant impact on how water behaves.

The oxygen and hydrogen atoms of a single water molecule, on the other hand, create covalent connections. Since covalent bonds require the exchanging of electrons between atoms, they are stronger than hydrogen bonds. These connections form a solid and cohesive structure that gives water its special characteristics.

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Answer:

2457.6

Explanation:

I calculated the answer and got it right.

A drop of medication is delivered to a patient every 45 s . if 5 drop of this medication occupy 1.0 ml then the medication will be delivered in 15 sec is 4 ml.

According to the question,

1 drop delivered = 45 sec = 0.75 min

and, 5 drop contains = 1.0 ml

then , 1 drop = 1 / 5 ml = 0.2 ml

this mean, 0.2 ml in = 0.75 min

so, how much ml in 1 min,

1 min = 0.2 ml / 0.75

        = 0.266 ml

now, how many ml in 15 min ,

in 15 min = 0.2667 ml × 15

              =  4 ml

Thus, A drop of medication is delivered to a patient every 45 s . if 5 drop of this medication occupy 1.0 ml then the medication will be delivered in 15 sec is 4 ml.

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Answer:

starch or carbs - amylase

fat - lipase

protien - pepsim

Answer:

C

Explanation:

5 moles of oxygen are needed to produce 1 mols of P4O10

x moles of oxygen are needed to produce 2 mols of P4O10

5/x = 1/2             Cross multiply

1*x = 2 * 5           Combine

x = 10

C

Answer:

pH=2

Explanation:

-log(1 x 10-2)=2

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

We know that the leaves are the parts of the plant that are involved in photosynthesis. Photosynthesis is the process by which green plants produce their own food in the presence of sunlight and chlorophyll. We know that the leave has an outer protective covering.

The tissue that plays this outer covering of a plant for is the  epidermis and its waxy cuticle. It prevents damage to the plant.

Water does  not stick to the leaves of the plant  owing to the fact that the leaves has a waterproof cuticle.

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Answer:true

Explanation:

This statement is correct

Answer:

Diamonds are very important in our daily lives ,so therefore it has many uses

1.They are used ad beauty products

2.They are used in automative industry

3.They are used in making windows

4.They are used as medicine

Answer:

It contains 24 neutrons.

Explanation:

Mass number = Protons + Neutrons

If you were to have 24 neutrons, the mass number would be 36, invalidating the known information. You have 12 protons and 12 neutrons to form a mass number of 24. Remember that your protons are the same thing as the atomic number, so you can make an equation using your known information to derive true statements.

Answer:

sulfer has 6 energy levels/orbits and 16 valence electrons

Answer: The enthalpy of the reaction is -1791.31 kJ.

Explanation:

Enthalpy change is the difference between the enthalpies of products and the enthalpies of reactants each multiplied by its stoichiometric coefficients. It is represented by the symbol \(Delta H^o_{rxn}\)

\(\Delta H^o_{rxn}=\sum (n \times \Delta H^o_{products})-\sum (n \times \Delta H^o_{reactants})\)        .....(1)

For the given chemical reaction:

\(3MnO_2(s)+4Al(s)\rightarrow 2Al_2O_3(s)+3Mn(s)\)

The expression for the enthalpy change of the reaction will be:

\(\Delta H^o_{rxn}=[(2 \times \Delta H^o_f_{(Al_2O_3(s))}) + (3 \times \Delta H^o_f_{(Mn(s))})] - [(3 \times  \Delta H^o_f_{(MnO_2(s))}) + (4 \times \Delta H^o_f_{(Al(s))})]\)

Taking the standard heat of formation values:

\(\Delta H^o_f_{(Al_2O_3(s))}=-1675.7kJ/mol\\\Delta H^o_f_{(Al(s))}=0kJ/mol\\\Delta H^o_f_{(MnO_2(s))}=-520.03kJ/mol\\\Delta H^o_f_{(Mn(s))}=0kJ/mol\)

Plugging values in the above expression:

\(\Delta H^o_{rxn}=[(2 \times (-1675.7))+(3 \times 0)] - [(3 \times (-520.03))+(4 \times 0)]\\\\\Delta H^o_{rxn}=-1791.31 kJ\)

Hence, the enthalpy of the reaction is -1791.31 kJ.

Answer:

talc mineral and magnetite

Explanation:

Answer:

2 answer

A List of Chemistry Laboratory Apparatus

Safety goggles and safety equipment.

Beakers.

Erlenmeyer flasks, AKA conical flasks.

Florence flasks, AKA boiling flasks.

Test tubes, tongs, and racks.

Watch glasses.

Answer:

Approximately \(2.53\; \rm L\) (rounded to three significant figures) assuming that \({\rm HCl}\, (aq)\) is in excess.

Explanation:

When \({\rm HCl} \, (aq)\) and \({\rm AgNO_3}\, (aq)\) precipitate, \({\rm AgCl} \, (s)\) (the said precipitate) and \(\rm HNO_3\, (aq)\) are produced:

\({\rm HCl}\, (aq) + {\rm AgNO_3}\, (aq) \to {\rm AgCl}\, (s) + {\rm HNO_3}\, (aq)\) (verify that this equation is indeed balanced.)

Look up the relative atomic mass of \(\rm Ag\) and \(\rm Cl\) on a modern periodic table:

Calculate the formula mass of the precipitate, \(\rm AgCl\):

\(\begin{aligned}& M({\rm AgCl})\\ &= (107.868 + 35.45)\; \rm g \cdot mol^{-1} \\\ &\approx 143.318 \; \rm g\cdot mol^{-1}\end{aligned}\).

Calculate the number of moles of \(\rm AgCl\) formula units in \(45.00\; \rm g\) of this compound:

\(\begin{aligned}n({\rm AgCl}) &= \frac{m({\rm AgCl})}{M({\rm AgCl})} \\ &\approx \frac{45.00\; \rm g}{143.318\; \rm g \cdot mol^{-1}}\approx 0.313987\; \rm mol \end{aligned}\).

Notice that in the balanced equation for this reaction, the coefficients of \({\rm AgNO_3} \, (aq)\) and \({\rm AgCl}\, (s)\) are both one.

In other words, if \({\rm HCl}\, (aq)\) (the other reactant) is in excess, it would take exactly \(1\; \rm mol\) of \({\rm AgNO_3} \, (aq)\!\) formula units to produce \(1\; \rm mol \!\) of \({\rm AgCl}\, (s)\!\) formula units.

Hence, it would take \(0.313987\; \rm mol\) of \({\rm AgNO_3} \, (aq)\!\) formula units to produce \(0.313987\; \rm mol\!\) of \({\rm AgCl}\, (s)\!\) formula units.

Calculate the volume of the \({\rm AgNO_3} \, (aq)\!\) solution given that the concentration of the solution is \(0.124\; \rm mol \cdot L^{-1}\):

\(\begin{aligned}V({\rm AgNO_3}) &= \frac{n({\rm AgNO_3})}{c({\rm AgNO_3})} \\ &\approx \frac{0.313987\; \rm mol}{0.124\; \rm mol \cdot L^{-1}}\approx 2.53\; \rm L\end{aligned}\).

(The answer was rounded to three significant figures so as to match the number of significant figures in the concentration of \({\rm AgNO_3} \, (aq)\!\).)

In other words, approximately \(2.53\; \rm L\) of that \({\rm AgNO_3} \, (aq)\!\) solution would be required.

Answer:

good morning! the answer to your question is true

Explanation:

have a wonderful day!

Answer:

True

Explanation:

Covalent bonds form between non-metal atoms. Covalently bonded substances are simple molecular substances.

The substances in order of increasing volatility are: CBr4, CHBr3, CH2Br2, CH3Cl, CH2Cl2, CH4.

The boiling points increase as the substances become heavier, with CH4 having the lowest boiling point and CBr4 having the highest boiling point.

This trend can be explained by intermolecular forces. The substances with stronger intermolecular forces will have higher boiling points. In this series, the substances with higher molecular weights have more electrons, which leads to stronger London dispersion forces.

Additionally, the substances with more polar bonds, such as CH3Cl and CH2Cl2, also have stronger dipole-dipole forces. Overall, the combination of these intermolecular forces determines the boiling points of the substances in this series.

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The empitical formula shows the simplest ratio of elements in a compound (not the total number of atoms in the molecule).

So to find the empirical formula we need to calculate how many moles of each atom we have in this sample. Then we will see the ratio of each element.

We are given the mass, so to convert it to moles we use the molar mass. For this we go to the periodic table and see that the values for each element are:

Na (sodium): 22,99 g/mol

H (hydrogen): 1 g/mol

P (phosphorus): 25,81 g/mol

So we calculate the moles of each element as follows:

And as we see, for every 0.833 moles of Na we have the same number of moles of P, so the ratio of these elements in the molecule is 1 to 1.

As for the hydrogen:

So the ratio Na to H is 1 to 2.

Now we can write the empirical formula as follows=

Answer: The universe is often defined as "the totality of existence", or everything that exists, everything that has existed, and everything that will exist.

Explanation:

The term for the sum of all space, matter, and energy that exist, that  may have existed in the past, and which will exist in the future is called the "universe."

The universe is a vast expanse that contains everything we know, including galaxies, stars, planets, and all forms of matter and energy The universe encompasses all physical matter and energy, including galaxies, stars, planets, gases, and particles. It is a vast and ever-expanding entity that contains everything we observe.

Universe comes from the Latin word "universum," which means "all things turned into one." It refers to the totality of everything that exists.The concept of the universe has been explored by scientists, philosophers, and astronomers for centuries. Through observations, experiments, and theoretical models, we have gained a better understanding of its structure, evolution, and composition.

To summarize all, the term for the sum of all space, matter, and energy that exist, have existed in the past, and will exist in the future is the universe.

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Answer:

The chemical elements are arranged in order of increasing atomic number.

Explanation:

Hydrogen = 1

Helium = 2

Lithium = 3

Answer:

Elements are organized first by their atomic number. The number on top of each element is the atomic number which identifies each element, and increases from there. It is also further organized by groups and periods. Groups are vertical columns, and elements of each group tend to share similar properties. For example, group 2A is the alkaline earth metals, these elements all tend to react with other elements similarily and share other properties as well because they tend to have the same number of valence electrons, with certain rules and exceptions particularly for the groups in the center of the periodic table Periods are the horizontal rows. The period number indicates the number of energy levels. So all the elements in period 4 have four energy levels.