Use the following information to answer the questions 1-3 Hydrogen chloride (HCl) is an acid called hydrochloric acid. It is extremely dangerous and proper safety equipment is required. Sodium hydroxide is a dangerous base. When sodium hydroxide reacts with hydrochloric acid, sodium chloride and water are produced. In addition, energy is released as a result of the reaction.

What type of chemical reaction has taken place?

Is this reaction exothermic or endothermic?

Based on your answers to question 1 and 2, write the balanced chemical reaction.

At the conclusion of the reaction, there are 95 grams of products.

How many grams of reactants must have been used?

the catch is that the top numbers are atomic masses the bottom numbers are the numbers of protons and electrons in an uncharged atom. they are the number of that atoms as you would find them on the periodic table. further, the numbers on the left are used to determine the missing numbers on the right

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant. 

Cause its being chemically applied?