Given the balanced equation representing a reaction:Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g)
This reaction occurs more quickly when powdered iron is used instead of a single piece of iron of the same mass because the powdered iron
(1) acts as a better catalyst than the single piece of iron
(2) absorbs less energy than the single piece of iron
(3) has a greater surface area than the single piece of iron
(4) is more metallic than the single piece of iron

Answers

Answer 1

Answer:

Answer: Option (3) is the correct answer.

Explanation:

One of the important factor on which rate of reaction depends is surface area. That is, when a compound is crushed into powdered form then there will be increase in surface area of the compound.

Hence, now more number of particles can interact, therefore, there will be increase in rate of reaction.

Thus, we can conclude that reaction occurs more quickly when powdered iron is used instead of a single piece of iron of the same mass because the powdered iron has a greater surface area than the single piece of iron.

Related Questions

Given: The equation for the synthesis of ammonia is H2(g) + N2(g) → NH3(g). If 12.0 grams of hydrogen are used up by the reaction, how many grams of ammonia will be produced?
Consider the following 1.0 mol L–1solutions. Which one of the following lists the solutions in decreasing order (that is, strongest to weakest) of electrolyte strength? (a) sodium phosphate > sulfuric acid > phosphoric acid > sucrose (sugar) (b) sucrose (sugar) > sulfuric acid > phosphoric acid > sodium phosphate (c) sulfuric acid > sodium phosphate > phosphoric acid > sucrose (sugar) (d) sodium phosphate > phosphoric acid > sulfuric acid > sucrose (sugar)
After examining a cell with a microscope, a student concludes that it is a plant cell.What feature did the student most likely observe that led him to this conclusion?(a) vacuole (c) chloroplast(b) nucleus (d) cell membrane
The smallest unit that retains the properties of an element is a(n) _____. atom molecule proton compound neutron
A sample of CO2(s) and a sample of CO2(g) differ in their1) chemical compositions2) empirical formulas3) molecular structures4) physical properties

Which phrase best describes the effect of a catalyst on a chemical reaction?

Answers

A catalyst lowers the activation energy of a reaction which makes the reaction happen at a faster rate. The catalyst lowers the activation energy by changing the reaction mechanism. I hope this helps. Let me know if anything is unclear.

Consider the following equation: 4NH₄ + 5O₂ → 4 NO + 6H₂O

How many moles of water are produced when 2 moles of NH4 react with excess Oxygen gas?

Answers

The moles of water are produced when 2 moles of NH4 react with excess Oxygen gas is 4 mole of H2O.

What is moles?

Moles are defined as a common unit used in science to measure vast numbers of extremely small things, such atoms, molecules, or other specific particles.

It can also be defined as a metric in chemistry that is used to describe a very high quantity of molecules, atoms, or particles.

Since we only have two moles of NH4, we switch out four for two.

2 NH4 + 3O2 --> 2NO + 4 H2O

As per the reaction, in order to produce 2 moles of NO2 and 4 moles of H2O, 2 moles of NH4 must react with 3 moles of oxygen gas.

Thus, the moles of water are produced when 2 moles of NH4 react with excess Oxygen gas is 4 mole of H2O.

To learn more about moles, refer to the link below:

brainly.com/question/26416088

#SPJ2

see we have two moles of NH4, so we replace 4 NH4 by 2 NH4.
Now, on balancing the equation, we get 2 NH4 + 3O2 ---> 2NO + 4 H2O (law of conservation of mass)
thus, 2 moles of NH4 react with 3 moles of oxygen gas to produce 2 moles of NO2 and 4 moles of H2O.
Thus, we get 4 moles of H2O

How to name alkane using iupac system

Answers

Naming an alkane through the IUPAC system is pretty simple
so all it is is (prefix for number of carbon) + ane
For the first four in this homologous series you have
Meth- 1 carbon
Eth- 2 carbons
Pro- 3 carbons
But- 4 Carbons
Onward you use the prefixes you know such as Pent, Hex, Hept, Oct, Non, Dec

So for an alkane with 3 Carbons it would be Propane, with 4 - Butane with 8- Octane etc.

50 grams of acetic acid C2H4O2 are dissolved in 200 g of water. Calculate the weight % and mole fraction of the acetic acid in the solution

Answers

$50g$ $of$ $C_2H_4O_2$ $in$ $200g$ $H_2O$

so:

$(50)/(200+50)+100\%= (50*100)/(250)\%=20\%$

$MW of acid = 2*C+4*H+2*O = 2*12+4*1+2*16=$

$=24+4+32=60g/mol$

so:

$(50g)/(60g/mol)\approx0.83moles$

it means that

in $50g$ of acid there is $\approx0.83$ moles of acid

$MW of H_2O = 2*H+O=2*1+16=2+16=18g/mol$

so:

$(200g)/(18g/mol)\approx11.11moles$

it means that:

in $200g$ of water there is $\approx11.11$ moles of water

therefore:

$(0.83mol)/(11.11mol+0.83mol)= (0.83mol)/(11.94mol)=0.069$

So your answers are:

$20\%$

and the mole fraction is:

$0.069$

When 5 grams of salt dissolve in 30 grams of water, what is the resulting mass of the mixture?

Answers

The answer is 35 grams.

When we mix salt and water, salt will dissolve. Still, it mass does not disappear, but remains intact. Mass cannot be destroyed. When salt is dissolved in the water, salt molecules are only re-positioned, but all the molecules are present as well as their mass. So if you add 5 grams of salt in 30 grams of water, the resulting mass will be 5 + 30 grams, which is 35 grams.

Answer: The resulting mass would be 35 grams.

Explanation: Mass cannot be destroyed, there would be no need to re-measure the mass. Therefore, if we add the masses we get 35.

How many atoms of carbon are present in a molecule of :
Fructose and galactose

Answers

In Fructose, there are 4 carbon atoms. Fructose is a 5 atom molecule, and one of these is oxygen, therefore, the other 4 are carbon.
In Galactose, there are 6 carbon atoms.
Hope this helps :)

Answer:

the answer is starch

Explanation: i chose fructose but got it wrong and showed that starch is correct

Other Questions

What is an exothermic chemical reaction?a. It is a reaction that converts matter to heat. b. It is a reaction that requires heat to proceed. c. It is a reaction that draws heat from its surroundings. d. It is a reaction that releases heat to its surroundings.

The interactive forces between particles are... A) less effective in solids than in liquids B) more effective in solids than in liquids C) equal to that of a gas D) zero

Which of the following is true in regard to ions?A. Ions can only carry positive charges. B. An ionized atom has a number of protons that is unequal to the number of electrons. C. A cation will hold a positive charge if it gains one or more electrons. D. Losing one or more electrons will turn an atom into an anion.

The two classifications of all chemicals are organic and salts. a. True b. False