Which statement most accurately describes the behavior of a catalyst? (A) A catalyst increases the ∆G of a reaction and hence the forward rate.
(B) A catalyst reduces the ∆H of a reaction and hence the temperature needed to produce products.
(C) A catalyst reduces the activation energy for a reaction and increases the rate of a reaction.
(D) A catalyst increases the equilibrium constant and final product concentrations

Answers

Answer 1

Answer: the a answer to the statement is between B and D

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Which statement explains why a C–O bond ismore polar than a F–O bond? (1) At STP, carbon has a greater density than fluorine. (2) A carbon atom has more valence electrons than a fluorine atom. (3) The difference in electronegativity between carbon and oxygen is greater than that between fluorine and oxygen. (4) The difference in first ionization energy between carbon and oxygen is greater than that between fluorine and oxygen.

Research about the reaction of baking soda and vinegar

Answers

Baking soda and vinegar react because of an acid-base reaction. The product of this creates carbon dioxide.

According to one acid-base theory, water acts as an acid when an H2O molecule(1) accepts an H+ (3) accepts an H-
(2) donates an H+ (4) donates an H-

Answers

Final answer:

According to the Brønsted-Lowry acid-base theory, water is acting as an acid when a water molecule donates an H+ ion. This also illustrates that water can behave as both an acid and a base due to its amphoteric nature.

Explanation:

According to the Brønsted-Lowry theory of acids and bases, water acts as an acid when a H2O molecule donates an H+. This is because an acid is defined as a substance that can donate a proton, which is a hydrogen ion (H+). Water (H2O) can act as both an acid and a base due to its amphoteric nature, but in this context where we have to choose between these four options, water acts as an acid when it donates an H+. An example of this is when water donates an H+ to ammonia (NH3), producing the ammonium ion (NH4+) and a hydroxide ion (OH-).

Learn more about Acid-Base Theory here:

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2KI + Pb(NO3)2 → 2KNO3 + PbI2 Determine how many grams of KI are required to produce 1.2g of PbI2.

Answers

Molar mass KI = 166.0028 g/mol and Pbl₂ = 461.0089 g/mol

2 Kl + Pb(NO₃)₂ ------> 2 KNO₃ + Pbl₂

2 x 166.0028 g ---------> 461.0089 g
? g KI -------------> 1.2 g

Mass KI = 1.2 x 2 x 166.0028 / 461.0089

Mass KI = 398.40672 / 461.0089

Mass KI = 0.86 g

hope this helps!

How many moles of NaCl are present in 23.5 grams of NaCl?

Answers

Answer:

0.342 mol

Explanation:

Molar mass of

NaCl = 58.4 g/mol

Number of moles in

20.0 g NaCl

20.0

58.4

/mol

0.342 mol

Which compound has both ionic and covalent bonding?(1) CaCO3 (3) CH3OH
(2) CH2Cl2 (4) C6H12O6

Answers

The compound that has both ionic and covalent bonding is $\boxed{\left( 1 \right){\text{ CaC}}{{\text{O}}_3}}$ .

Further Explanation:

The attraction between different atoms, molecules and ions is known as a chemical bond. The formation of various types of compounds takes place as a result of these chemical bonds.

An ionic bond is formed as a result of the interaction between a metal and a non-metal. Metals have the tendency to lose electrons while non-metals tend to gain electrons. Due to this, metal atoms form cations by loss of electrons and non-metals become anions with the gain of electrons.

A covalent bond is formed by the mutual sharing of electrons between the bonded atoms. It is also called the molecular bond. Such bonds usually exist between two or more non-metals.

(1) ${\text{CaC}}{{\text{O}}_{\text{3}}}$

Its constituents are ${\text{C}}{{\text{a}}^(2 + )}$ and ${\text{CO}}_3^(2 - )$ ions. The bond between calcium and carbonate ions is an ionic bond. But the bond between the carbon atom and the oxygen atom of carbonate is formed by sharing of electrons so it is a covalent bond. So ${\text{CaC}}{{\text{O}}_{\text{3}}}$ has both ionic and covalent bonding and therefore this option is correct.

(2) ${\text{C}}{{\text{H}}_2}{\text{C}}{{\text{l}}_2}$

It has carbon, hydrogen and chlorine atoms. All of them are nonmetals and the bonds formed between nonmetals are covalent bonds. So ${\text{C}}{{\text{H}}_2}{\text{C}}{{\text{l}}_2}$ has only covalent bonds and therefore this option is incorrect.

(3) ${\text{C}}{{\text{H}}_3}{\text{OH}}$

It has carbon, hydrogen and oxygen atoms. All of them are nonmetals and the bonds formed between nonmetals are covalent bonds. So ${\text{C}}{{\text{H}}_3}{\text{OH}}$ has only covalent bonds and therefore this option is incorrect.

(4) ${{\text{C}}_{\text{6}}}{{\text{H}}_{{\text{12}}}}{{\text{O}}_{\text{6}}}$

It has carbon, hydrogen and oxygen atoms. All of them are nonmetals and the bonds formed between nonmetals are covalent bonds. So ${{\text{C}}_{\text{6}}}{{\text{H}}_{{\text{12}}}}{{\text{O}}_{\text{6}}}$ has only covalent bonds and therefore this option is incorrect.

Learn more:

Identification of ionic bonding: brainly.com/question/1603987
What type of bond exists between phosphorus and chlorine? brainly.com/question/81715

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Ionic and covalent compounds

Keywords: chemical bond, ionic bond, covalent bond, CaCO3, CH2Cl2, C2H12O6, CH3OH, carbon, hydrogen, oxygen.

CaCO3 is the substance that contains both ionic and covalent bonds. Calcium ions (Ca2+) and carbonate ions (CO3-2) make up the salt known as CaCO3. Ionic bonds, which are created when one atom donates electrons to another atom, are what bind the calcium and carbonate ions together.

Three oxygen atoms and one carbon atom, linked together by covalent bonds, make up the carbonate ion. The three oxygen atoms and the carbon atom share electrons to create a covalent connection. Atoms exchange electrons to make covalent connections, whereas atoms give away electrons to produce ionic bonds.

In CaCO3, an ionic connection is created when the calcium atom donates electrons to the carbonate ion. The carbon atom shares electrons at the same moment.

Learn more about covalent bonding at:

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Calculate the number of moles of Cu in 2.4x10^21 atoms of Cu