Why do reactants require relatively high-energy collisions to form products?

Chemistry

1 answer:

Svet_ta [14]3 years ago

5 0

Answer:

The correct option is C. Reactants need to gain energy to break bonds and to form new ones.

Explanation:

The Collision Theory explains the fact that for a chemical reaction to occur, the reactants must collide with one another with a force which breaks the bonds in the reactants, so that new bonds can be formed among the reactants. If molecules do not collide with a certain force, the chemical reaction won't occur. The energy with which the molecules collide is termed as the activation energy. The more the concentration of reactants, the more are the chances of collisions and the more will be the activation energy.

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How many grams of ammonium chloride (gram formula mass= 53.5 g) are contained in .500 L of a 2.00 M solution?

Elza [17]

Answer:

53.5g of NH4Cl

Explanation:

First, we need to obtain the number of mole of NH4Cl. This is illustrated below:

Volume = 0.5L

Molarity = 2M

Mole =?

Molarity = mole /Volume

Mole = Molarity x Volume

Mole = 2 x 0.5

Mole = 1mole

Now, let us convert 1mole of NH4Cl to gram. This is illustrated below:

Molar Mass of NH4Cl = 53.5g/mol

Number of mole = 1

Mass =?

Number of mole = Mass /Molar Mass

Mass = number of mole x molar Mass

Mass = 1 x 53.5

Mass = 53.5g

Therefore, 53.5g of NH4Cl is contained in the solution.

8 0

3 years ago

Select the properly written and balanced equation for the following chemical reaction: Sodium metal and an aqueous solution of m

Setler [38]

Answer: $2Na(s)+MgI_2 (aq)\rightarrow 2NaI(aq)+Mg(s)$

Explanation: The chemical reaction is written by writing down the chemical formulas of the reactants on the left hand side and the chemical formulas of products on the right hand side separated by a right arrow.

This is a single displacement reaction in which a more reactive element displaces the less reactive element from its salt solution. Thus sodium is more reactive than Mg and thus displaces it from $MgI_2$ .

$2Na(s)+MgI_2 (aq)\rightarrow 2NaI(aq)+Mg(s)$

The number of atoms of each element must be same on both sides of the reaction so as to follow the law of conservation of mass. Thus the equation is balanced.