In this technical note, a simple model is employed to provide easy understanding on why a more uniform fuel/oxygen distribution can enhance fuel cell performance at a given flow rate. Results show that the SOFC
Adequate dissolved oxygen is necessary for good water quality. Oxygen is a necessary element to all forms of life. Natural stream purification processes require adequate oxygen levels in order to provide for aerobic life forms. As dissolved oxygen levels in water drop below 5.0 mg/l, aquatic life...
5 Air is a mixture of oxygen, nitrogen and other gases.Which statement explains why oxygen can be separated from nitrogen by the fractional distillation of liquid air? T A Oxygen is denser than nitrogen. B Oxygen is more reactive than nitrogen. C The two elements have fixed melting points....
This is because of fresh oxygen.当人们困倦时,他们打哈欠帮助保持清醒。这是因为新鲜的氧气。可知打哈欠可以让人们变得清醒,故填A。9.A细节理解题。根据文中“When one person yawns,others often begin to yawn, too. ”当一个人打哈欠时,其他人也经常打哈欠。可知当一个人打哈欠时,另外的人也会跟着打...
PEARSON IIT JEE FOUNDATION-CHEMICAL BONDING -Level 3 Why is a nitrogen molecule less reactive than an oxygen molecule? 02:07 CO(2) exists in the gaseous state, whereas SiO(2) is a hard solid thou... 02:01 A molecule has 3 bonded pairs and 2 lone pairs on the central atom. Ex......
The main reason that oxygen-oxygen is a weak bond is that oxygen bond is so unstable. The another reason is that repulsion between two electron rich...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a...
Why is SO_2 non polar whereas SO_3 is polar? Why do we use prefixes only in covalent compounds? Explain the principle of gaseous exchange in the lungs. Why do metals and non-metals bond? Explain how the colloidal state may be an aid to chemical reactions taking place in protoplasm...
Black or very dark green poop can be a side effect of iron pills you take foranemia,a condition that happens when you don't have enough redblood cellsto carry oxygen around your body. This side effect isn't harmful, but call your doctor if: ...
What Is Tummy Time? What Are the Benefits of Tummy Time? When to Start Tummy Time? How Much Tummy Time Is Recommended by Age and How Often How to Do Tummy Time How to Make Tummy Time Enjoyable Safety Considerations for Tummy Time The Bottom Line As a parent of a newborn, you’ve pr...
Of the many important reasons to worry about the thousands of fires raging in the world’s largest rainforest, oxygen supply is not one of them.