Leave the rocks submerged in the jars for about 90 minutes. Then use a spoon to carefully scoop the rocks from the jar labeled 0% Acid. Dry the rocks by patting, or blotting, them with a soft rag. After the rocks are dry, measure their mass and record it on the sticky note. Use this format: “Final Mass: ___.” Place the jar with the liquid on the counter and place the dried rocks next to the jar. Repeat this process for the other three jars. After you have recorded the final mass for each jar, complete this table

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

What are the seven economic and social goals?

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?