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3 years ago

Which could be the catalyst in a chemical reaction?

Chemistry

1 answer:

AlekseyPX3 years ago

4 0

Answer: C. enzyme

Explanation:

A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and convert to products.

The catalyst itself does not take part in the chemical reaction and is regenerated as such at the end.

Enzymes are proteins that reduce the activation energy of biological reaction. Enzymes increase the speed of a reaction and help it to run faster. Thus they are also called as bio catalysts.

Activated complex is the transition state which is very unstable and is formed during the course when reactants are converted to products.

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.35 grams of sodium chloride are dissolved to make 150 milliliters of solution. What is the molarity of the solution?

wariber [46]

NaCl molar mass 58.4 g/mol

moles of NaCl = .35 g * 1 mol/58.4 g = 0.005993 mol
volume of solution = 150 mL = 0.15 L

molarity = mol/vol(in L)
[NaCl] = 0.005933mol/0.15L = 0.03995 M = 0.040 M

6 0

3 years ago

What is the balanced chemical equation for Benzoic acid + octanol ?

Oxana [17]

Answer:

C7H6O2+C8H17OH=C15H22O2+H2O

Explanation:

by reacting alcohol and acid we get ester and water

3 0

3 years ago

Consider the amino acid below, which is called alanine

kondaur [170]

A- the CH3 group

Just answered

7 0

3 years ago

Read 2 more answers

Calculate the number of ions of the following compound :16g of H2CO3

ludmilkaskok [199]

Answer:

1) a) 1.81 × 10²³ molecules (b) 1.93 × 10²³ molecules (c) 0.66× 10²³ molecules

2) a) 0.45× 10²³ions (b) 0.84× 10²³ions (c) 3.6 × 10²³ions

Explanation:

1) Number of molecules:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

a) 16g of H₂CO₃

Number of moles = mass/ molar mass

Number of moles = 16 g/ 62.03 g/mol

Number of moles = 0.3 mol

1 mol = 6.022 × 10²³ molecules

0.3 mol × 6.022 × 10²³ molecules /1 mol

1.81 × 10²³ molecules

b) 20g of HNO₃

Number of moles = mass/ molar mass

Number of moles = 20 g/ 63.01 g/mol

Number of moles = 0.32 mol

1 mol = 6.022 × 10²³ molecules

0.32 mol × 6.022 × 10²³ molecules /1 mol

1.93 × 10²³ molecules

c) 30g of C₆H₁₂O₆

Number of moles = mass/ molar mass

Number of moles = 20 g/ 180.156 g/mol

Number of moles = 0.11 mol

1 mol = 6.022 × 10²³ molecules

0.11 mol × 6.022 × 10²³ molecules /1 mol

0.66× 10²³ molecules

2. Calculate the number of ions in the following compounds:

a) 10g of AlCl₃

Number of moles = mass/ molar mass

Number of moles = 10g/ 133.34 g/mol

Number of moles = 0.075 mol

1 mol = 6.022 × 10²³ ions

0.075 mol × 6.022 × 10²³ ions/1 mol

0.45× 10²³ions

b) 30g of BaCl₂

Number of moles = mass/ molar mass

Number of moles = 30g/ 208.23 g/mol

Number of moles = 0.14 mol

1 mol = 6.022 × 10²³ ions

0.14 mol × 6.022 × 10²³ ions/1 mol

0.84× 10²³ions

c) 58 g of H2SO4

Number of moles = mass/ molar mass

Number of moles = 58g/ 98.079 g/mol

Number of moles = 0.59 mol

1 mol = 6.022 × 10²³ ions

0.59 mol × 6.022 × 10²³ ions/1 mol

3.6 × 10²³ions

Explanation:

5 0

2 years ago

Endothermic and Exothermic Activity For this assignment, you will create your own potential energy diagrams for each of the thre

Flura [38]

Answer:

Explanation:

The correct format for the Table is shown below:

Generic Reactions Reactants Products Transition state

Synthesis

A + B → AB A+B = -15 kJ AB = 20 kJ 30 kJ

Single

Replacement

C + AB → CB + A C + AB = 65 kJ CB + A = 30 kJ 85 kJ

Double

Replacement

AB+CD → AD+CB AB+CD = 10 kJ AD+CB = 60 kJ 70 kJ

We are to create our own potential energy diagrams for each of the three chemical reactions.Then you will analyze the data and your diagrams for each reaction.

THE POTENTIAL ENERGY DIAGRAMS FOR THE THREE CHEMICAL REACTIONS & THE ANALYSIS ARE SHOWN IN THE DIAGRAMS ATTACHED BELOW .

the total change in enthalpy and the activation energy using the energy values provided for each reaction is :

Activation Energy Enthalpy change

Synthesis reaction 45 kJ + 35 kJ

Single replacement 20 kJ - 35 kJ

reaction

Double replacement 65 kJ + 50 kJ

3 0

3 years ago