Answer: D convection currents
Explanation:
The seafloor spreading is a phenomena that occurs due to liberation of heat from the convection currents generated in the mantle. It makes the earth crust more plastic and less dense. This happens at divergent plate boundaries. As the plates move apart, the less denser material rises. It leads to the formation of mountain and crust cracks.
Answer:
Plant and animal cells differ in that plants have a large central vacuole, while animals have smaller vacuoles. Plant cells also have cell walls and plastids, while animal cells do not.
Answer:
552.22
Explanation:
density=Mass/volume
therefore, Mass=density×volume
Mass=3.84*136
Answer:
11.442E23molecules
Explanation:
Given data:
Number of moles of water = 1.9 mol
Number of molecules of water = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
In 1.9 moles:
1.9 mol × 6.022 × 10²³ molecules / 1 mol
11.442 × 10²³ molecules
In e notation:
11.442E23 molecules
