The relative atomic mass is the weighted average mass of elements relative to 1/12th the mass of a 12-C atom.
Isotopes are atoms of the same element with different masses , in other words different numbers of neutrons.
Relative atomic mass =sum of (mass x percentage )
R.a.m = 62.9300 x 69.15% + 64.9200 x 30.85%
= 43.52 + 20.03
= 63.55 amu
Answer:
B. Extreme heat and pressure.....
Explanation:
This is how sedimentary rocks are actually made. I had learned recently in my class about these rocks, and my teacher told that these are made by heat and pressure. And these are the types of rocks that you'll find in canyons for example Grand Canyon.
You know that when something gets pressurized then it changes shape, same for rocks, if they're having lots of pressure on them, then they will also basically turn into newer rocks and also change shape. They also change looks because sedimentary rocks don't look like any other type of rock.
Also, heat can also be found in the crust of the earth since there is the Mantle under the crust which is filled up of MAGMA! (supa hot magma!! woohoo!) And also, because all of the dirt and stuff underground is packed together, the friction can also create heat. As you know, heat makes things expand, you might have done this before.... when you learned about hot and cold gas, you might have also learned that hot gases are more larger, and require more volume than cold gas. That means that the size of the object changes, that too, it's not just for gas, it's for everything, <em>including rocks!</em>.
Hence, your answer is B. Extreme heat and pressure from inside the earths surface......
:D
Have a great day!
The pressure will not affect the rate of solution.
<span>Nuclear reactions have two main types: fission reactions and fusion reactions. When two light nuclei are joined to create a heavier and more stable nucleus, this process is called the fusion reaction. In the fission reaction, the heavy nucleus split into two nuclei with a smaller mass number. In other words, fission is splitting of atoms although not all atoms undergo fission, only few went through normal circumstances (that is a fact). </span>
Answer:
Here's what I get
Explanation:
A plant extract is a mixture because it contains different substances: acetone or ethanol, chlorophylls A and B, carotene and xanthophylls.
It is homogeneous because it is a solution. There is only one phase: the liquid phase. You cannot see the pigments as separate phases.
You can separate the pigments by paper, thin layer, or column chromatography.
Many schools use paper chromatography, because paper is cheap.
As the mixture of pigments follows the solvent up the paper, they separate into different coloured bands according to their attractive forces to the cellulose in the paper.
The chlorophylls are strongly attracted to the paper, so they don't travel very far.
The nonpolar carotene molecules have little attraction to the polar cellulose, so they are carried along by the solvent front.
