Objects in the universe vary in their composition. Which of the following best describes the composition of a galaxy? A. A solar system containing more than one star larger than our sun

B. A collection of asteroids, dust, and gases orbiting each other in space

C. An unidentified object in space that can be seen using a powerful telescope

D. A collection of billions of stars and their satellites held together by gravity

Its D

Explanation:

D. A collection of billions of stars and their satellites held together by gravity... My mom teaches science.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.