Answer:
B
Explanation:
1,2,2
we O2 then we supposed to balance the one that will give Mg+O2-2MgO
made up of what?
2.pahoehoe
3.friction
4.viscosity
5.element
6.silicia
7.compound
8.carbon
Correct answer choice is:
3) Friction
Explanation:
Low viscosity relates to materials that are thin, such as water, while high viscosity materials are thick. The viscosity of a fluid is a sum of its opposition to progressive deformation by shear strain or tensile stress. For liquids, it compares to the simple idea of thickness, for example, honey has a very greater viscosity than water.
Answer:
Option (3)
Explanation:
The magma that is comprised of low silica content is termed as low viscosity magma. By low viscosity magma, it means that the magma can easily flow over the surface, without any difficulty. This indicates that there is less friction between the surface and the flowing magma. Friction usually refers to the resistant force that obstructs the flow of a liquid in any direction.
When there is a high frictional force, then the liquid flows very slowly with much difficulty. On the other hand, when there is a low force of friction, then the liquid can flow easily over a surface.
Thus, in a low viscosity magma, there is low silica content, so there is less frictional force between the surface and the magma, and the magma flows easily over the surface.
Hence, the correct answer is option (3).
Gas molecules vibrate and bounce off of each other from time to time. Liquid molecules also vibrate, but they're so close together that they slide around each other as opposed to bouncing off of each other.
If poured into a flask, a liquid takes on the shape of the flask, but it does not expand. Gas will take on both the shape and the volume of the flask as it expands to fill the entire vessel. Gas is also compressible, while liquid is only compressible to an extent. The compressibility of gas occurs because it is more vulnerable to changes in temperature and pressure.
Liquids also display surface tension, while gases do not. Surface tension happens since the molecules of water on the surface of a body of water are not surrounded by other molecules on all sides and cohere more strongly to the molecules around them, creating a film on top of the water.
The correct answer is option B, above a bowl of ice water.
Standard temperature is zero degrees Celsius (°C) or 32 degrees Fahrenheit (°F). Standard pressure is 760 mmHg or 1 atm.
Both the conditions of Standard temperature and standard pressure is basically the freezing point of pure water at sea level.
Thus the air above a bowl of ice water is at standard temperature and pressure
Answer is B for Edmentum users
Answer:
Mg²⁺ cation
Br⁻ anion
Explanation:
Magnesium is present in group two of periodic table.
It is alkaline earth metal.
It has two valance electrons.
Thus by losing two valance electrons it complete the octet. The common oxidation state of magnesium is +2.
The bromine is present in group seventeen.
It has seven valance electrons.
It is the member of halogen family.
To complete the octet bromine required one electron. By gaining the one electron it showed -1 oxidation state.
When bromine combine with magnesium both formed MgBr₂.
The one atom of Mg have +2 oxidation state while bromine have -1 that's why to make the overall compound neutral two bromine atoms combine with one atom of magnesium.