PLS I NEED HELP ON NUMBER 4 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?
Double Replacement and Neutralization Reaction

Is this reaction exothermic or endothermic?
Exothermic

Based on your answers to question 1 and 2, write the balanced chemical reaction.
NaOH+HCl= NaCl+H2O

4. At the conclusion of the reaction, there are 95 grams of products. How many grams of reactants must have been used?

The image compares the arrangement of electrons in two different neutral atoms. a figure labeled atom q has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has six black spheres. to the left of this figure is another figure labeled atom p. atom p has a shaded sphere at the center of three concentric circles. the innermost circle has two black spheres. the middle circle has seven black spheres. which of the following best explains the position of the two atoms in the periodic table? atom p has an estimated zeff of 7 and is therefore to the left of atom q, which has a zeff of 6. atom p has an estimated zeff of 7 and is therefore to the right of atom q, which has a zeff of 6. atom p has an estimated zeff of 5 and is therefore below atom q, which has a zeff of 4. atom p has an estimated zeff of 5 and is therefore above atom q, which has a zeff of 4.