In this step, you will create a model solution of pH = 7 with equal concentrations of Hf and OH-. The black beans will represent H+ ions and white navy beans will represent OH-ions. Click or tap the bag of black beans to add 50
of the beans to the beaker.

Sarah wants to know where in her garden chamomile would grow the best. she thinks chamomile will grow best in the corner of the garden that gets the most sunlight. to test her hypothesis, she decides to plant several groups of chamomile in her garden as an experiment. which of the following variables will sarah need to measure to know which group of plants grew best? a. the location of the plants b. the type of plants c. the height of the plants d. the amount of water she gives the plants

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Chromosome 17 is made of over million base pairs.