Which of the following is true for all chemical reactions? . a) the total mass of the reactants increase. b) the total mass of the products is greater than the total mass of the reactants. c) the total mass of the products is less than the total mass of the reactants. d) the total mass of the reactants equals the total mass of the products

Option (d) is the correct answer.

Explanation:

A chemical reaction is a reaction which bring changes in the chemical composition of a substance.

For example,

Mass of Na = 23

Mass of Cl = 35

Hence, total mass of reactants = g/mol

                                                    = 46 + 70 = 116 g/mol

Total mass of products = g/mol

                                       = g/mol = 116 g/mol

So, we can see that formation of new bonds take place in a chemical reaction and no change in the mass of reactants or products occur.

Also, according to the law of conservation of mass, the mass of reactants equals the mass of products in a chemical reaction.

Thus, we can conclude that out of the given options, this is true for all chemical reactions that the total mass of the reactants equals the total mass of the products.

first let us lay out the formula for potential

and kinetic energy:

pe = mgh

ke = (mv^2)/2

where: m=mass, v=velocity, g=gravitational

acceleration, h=height

calculating for mass using the known values of

pe:

340j = m (9.81 m/s^2) (50ft) (1m/3.28ft)

m = 2.27 kg

the law of conservation of energy states that

energy is neither created nor destroyed. therefore, the change in kinetic

energy from 50 ft to 35 ft would be equal to the change in potential energy

from 50 ft to 35 ft. however it would be opposite in signs since one is losing

while other is gaining.

ke(35ft) – ke(50ft) = - [ pe(35ft) – pe(50ft]

ke(50ft) = 0 since the brick is initially at rest

ke(35ft) = 340j - 2.27kg (9.81 m/s^2) (35ft)

(1m/3.28 ft)

ke(35ft)

= 102.38 j

practical process described pest part of scientific investigation.

because practical knowledge is powerful then therotical knowledge.