Which of the following equations illustrates the law of conservation of matter?
a. 2na + cl2 nacl
b. 2na + cl2 2nacl
c. 2na + 2cl2 2nacl
d. na + cl2 2nacl

The correct answer is option (B).

Explanation:

Law of conservation of mass: 'In a chemical reaction, mass neither be created nor be destroyed'

In the balance chemical equation,total mass of the reactants is equal to the total mass of the products.

A.

117 g/mol  ≠ 58.5 g/mol

Law of Conservation of Mass not followed.

B.

117 g/mol  =  117 g/mol

Law of Conservation of Mass is followed.

C.

188 g/mol  ≠ 117 g/mol

Law of Conservation of Mass not followed.

D.

94 g/mol  ≠ 117 g/mol

Law of Conservation of Mass not followed.

Hence, the correct answer is option (B).

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.