+→ + +
when you have an upset stomach and you take an antacid, this unbalanced reaction occurs.

what set of coefficients will balance this equation?
a) 1,1,1,1,1
b) 2,3,3,1,3
c) 2,1,1,1,1
d) 2,2,2,1,3

The correct answer is Option C.

Explanation:

Every balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed but it can only be transformed from one form to another.

In a chemical equation, number of individual atoms on reactant side must be equal to the total number of individual atoms on product side.

To balance the given unbalanced chemical equation, the chemical equation follows:

By Stoichiometry of the reaction,

2 moles of hydrochloric acid reacts with 1 mole of calcium carbonate to produce 1 mole of calcium chloride, 1 mole of water and 1 mole of carbon dioxide.

Hence, the correct answer is Option C.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.