Two unknown household items are being tested with litmus paper. Substance A turns red litmus paper blue and Substance B turns blue litmus paper red. Which of the following best explains the results of the experiment?
a. Substance A is an acid and Substance B is a base.
b. Substance A is a base and Substance B is an acid.
c. Both Substances A and B are acids.
d. Both Substances A and B are bases.

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Plzz a sample of table sugar (sucrose, c12h22o11) has a mass of 7.801 g. ● a) calculate the number of moles of c12h22o11 in the sample b) calculate the number of moles of each element in c12h22o11 (number of moles of c, number of moles of h & number of moles of o) in the sample. (use your answer from part a as your starting point.) show your work and highlight your final answer. calculate the number of atoms of each element in c12h22o11 (number of atoms of c, number of atoms of h & number of atoms of o) in the sample. (use your answers from part b as your starting for each element.) show your work and highlight your final answer.