Which substances will make a salt when combined? (2 points) vinegar and antacids soda and wine soap and ammonia fertilizer and detergent

Which fact represents evidence for the big bang theory?

Voltaic cells produce a positive overall charge. what does this indicate? a. the reaction is likely to be endothermic. b. the reaction is spontaneous. c. the reaction is not likely to occur. d. the reaction is not spontaneous.

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false