The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium.
(B) increases the fraction of reactant molecules with a given kinetic energy.
(C) provides an alternate path with a different activation energy.
(D) lowers the enthalpy change in the overall reaction

Answers

Answer 1

Answer: the addition of catalyst in a chemical reaction has 2 functions
1. if you add negative catalyst then the rate of chemical reaction decreases
2. if you add positive catalyst then the rate of chemical reaction increases.

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Name the following alkane molecule:CH3CH(CH3)CH2CH(CH3)2

PLS HELP ILL MAKE BRAINLIEST 30 POINTS!!Which parts of the muscular and skeletal system work together to move muscles and bones? nerves esophagus and intestine arteries and vessels tendons and ligaments

Answers

Answer:

tendons and ligaments

The following balanced equation shows the decomposition of water (H2O). According to the equation, how many oxygen atoms are in the reactants? 2 H2O 2H2 + O2

Answers

Answer : The number of oxygen atoms present on reactant side are, 4

Explanation :

Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.

Decomposition reaction : It is defined as the reaction in which the larger molecule decomposes to give two or more smaller molecules as a product.

The given balanced chemical reaction is,

$2H_2O\rightarrow 2H_2+O_2$

From the balanced chemical reaction we conclude that, there 4 atoms of hydrogen and 2 atoms of oxygen present on both reactant side and product side.

Hence, the number of oxygen atoms present on reactant side are, 4

2 atoms of oxygen are reactants.

2. 7.5 g of potassium react with water to produce potassium hydroxide and hydrogen gas. Calculate the mass of potassium hydroxide produced. (8 points)

Answers

Answer:

10.7 g of KOH

Explanation:

First of all, we determine the reaction:

2K (s) + 2H₂O(l) → H₂(g) + 2KOH(aq)

We convert the mass of K, to moles → 7.5 g . mol/39.1 g = 0.192 moles

Ratio is 2:2, so the moles I have of K must produce the same moles of KOH. In this case, the produces moles of KOH are 0.192 moles.

We convert the moles to mass, to finish the answer:

0.192 mol . 56.1g /1mol = 10.7 g of KOH

What is the limiting reactant if 4.0 g of Nh3 react with 8.0 g of oxygen?

Answers

Answer : The limiting reagent is $O_2$ .

Solution : Given,

Mass of $NH_3$ = 4.0 g

Mass of $O_2$ = 8.0 g

Molar mass of $NH_3$ = 17 g/mole

Molar mass of $O_2$ = 32 g/mole

First we have to calculate the moles of $NH_3$ and $O_2$ .

$\text{ Moles of }NH_3=\frac{\text{ Mass of }NH_3}{\text{ Molar mass of }NH_3}=(4.0g)/(17g/mole)=0.24moles$

$\text{ Moles of }O_2=\frac{\text{ Mass of }O_2}{\text{ Molar mass of }O_2}=(8.0g)/(32g/mole)=0.25moles$

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

$4NH_3+5O_2\rightarrow 4NO+6H_2O$

From the balanced reaction we conclude that

As, 5 mole of $O_2$ react with 4 mole of $NH_3$

So, 0.25 moles of $O_2$ react with $(0.25)/(5)* 4=0.20$ moles of $NH_3$

From this we conclude that, $NH_3$ is an excess reagent because the given moles are greater than the required moles and $O_2$ is a limiting reagent and it limits the formation of product.

Hence, the limiting reagent is $O_2$ .

NH3-The limiting reactant is the reactant that get completely used up in a reaction

The valence of aluminum is +3, and the valence of chlorine is –1. The formula for aluminum chloride iscorrectly written as
A. ClAl3.
B. Cl3Al.
C. AlCl3.
D. Al3Cl.

Answers

The correct option is C.i.e. AlCl3Given:The valence of aluminum is +3, and the valence of chlorine is –1. Thus, 3 chlorine atoms each of (-1 charge )combine to make the charge balance because of Al (3+). Thus, 1 atom of Aluminum (Al) binds with three atoms of Chlorine (Cl).Thus, the net foromula becomes AlCl3

AICI3

which is choice c.

Aluminium chloride

Chemical compound

DescriptionAluminium chloride is the main compound of aluminium and chlorine. It is white, but samples are often contaminated with iron(III) chloride, giving it a yellow color. The solid has a low melting and boiling point. Wikipedia

IUPAC ID: aluminium chloride

Molar mass: 133.34 g/mol

Soluble in: Water

Related Lewis acids: Iron(III) chloride; Boron trifluoride

Heat capacity (C): 91.1 J/mol·K

Other names: aluminium(III) chloride; aluminum trichloride

What type of bond is formed when an atom of potassium transfers an electron to a bromine atom?

Answers

A Polar Covalent Bond is created when the shared electrons between atoms are not equally shared. This occurs when one atom has a higher electronegativity than the atom it is sharing with .

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Given the balanced equation representing a reaction:H+(aq) + OH-(aq) ==> H2O(l) + energyIn this reaction there is conservation of(1) mass, only(2) mass and charge, only(3) charge and energy, only(4) charge, energy, and mass

What are the coefficients that will balance the equation below?NaOH + AICI:NaCl + Al(OH)31, 1, 1,31, 3, 1,33, 1, 3, 11, 3, 3, 1