Newton's law of universal gravitation, the law of conservation of mass, the law of superposition, and the laws of thermodynamics are all examples of scientific laws because a. they have been approved and accepted by congress. b. there are no exceptions to these laws under specific stated conditions. c. they have been modified repeatedly over time. d. they are found in science textbooks.

The answer is B. there are no exceptions to these laws under specific stated conditions.

Explanation:

These laws are a set of facts, which affirms a constant relationship between several variables and factors which have gone through observations and that have been experienced, interpreted and are considered as demonstrated, that is, the hypothesis of these laws has been demonstrated through experiments.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

i think its 100.

hope this !