The correct answer is A. When free hydrogen ions and free hydroxyl ions are removed from solutions of acids and bases, the acidic and basic properties disappear.
The strength of the acid or base depends upon its degree of ionization. Since different acids and different bases dissociate or ionize to different extent in water so their degree of ionization is also different. Strong acids and strong bases ionize in water completely while the weaker acids or bases ionize partially. Ionization of the weak acids in water are in equilibrium. The degree of ionization is the ratio of the number of ionized molecules to the number of molecules which are dissolved in water. In case of acids the ionized molecules are hydrogen ions and in case of bases hydroxyl ions.
The correct answer is - underwater mountain ranges.
The mid-ocean ridges are actually underwater mountain ranges, which usually are very long, in fact the longest mountain range on Earth is created on the divergent boundary between the Eurasian and North American tectonic plates and between the African and South American tectonic plates. At the divergent tectonic boundaries we have the creation of new crust which rises from the mantle and fills in the gap between the tectonic plates. Because of the big amount of magma and high pressure, very big and long underwater mountain ranges are formed.
Supine hypotension syndrome is the medical term for when a pregnant woman feels lightheaded and has a dip in blood pressure while lying down.
Supine hypotension in pregnancy: what is it?
- When you're pregnant, resting flat on your back might make some symptoms, including indigestion and shortness of breath, worse. Her blood pressure may also drop as a result of it.
- Supine hypotension syndrome is the medical term for when her blood pressure drops while she is pregnant and laying on her back. When a pregnant woman lies supine, the gravid uterus pushes on the inferior vena cava, resulting in a reduction in central venous return. This condition is known as a supine hypotensive syndrome (also known as inferior vena cava compression syndrome).
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