A student was asked to formulate a hypothesis about what would happen if 100 mL of 0.1 MNaOH(aq) at 25°C was combined with 100 mL of 0.1 MMgCl2 (aq) at 25°C. Which of
the following hypotheses indicates that the student thought a chemical change would
occur?

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

the answer is minerals.

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?