Answer:
Explanation:
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In this case, since the percent abundance of Br-79 is 51.1% and that of the Br-81 is 48.9 %, we can write:
Taking into account that the mass of bromine from the periodic table is 79.909 amu, the mass of Br-81 turns out:
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Explanation:
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. ... Electric charge is carried by subatomic particles. In ordinary matter, negativecharge is carried by electrons, and positive charge is carried by the protons in the nuclei of atoms.
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charge: positive and negative (commonly carried by protons and electrons respectively). Like charges repel and unlike attract. An object with an absence of net charge is referred to as neutral. Early knowledge of how charged substances interact is now called classical electrodynamics, and is still accurate for problems that do not require consideration of quantum effects.
Answer:
H3PO4 Mol mass..
= (3 x H1 = 3) + (1 x P31 = 31) + (4 x O16 = 64). = 98g/mol.
a)..Hydrogen: = 3 / 98 = 0.0306 x 100% = 3.06%.
b)..Phosphorus = 31/98 = 0.3162 x 100% = 31.63%.
c)..Oxygen = 64/98 = 0.6531 x 100% = 65.31%.
(Total = 100% H3PO4).
Explanation:
Find the molar mass of all the elements in the compound in grams per mole.
Find the molecular mass of the entire compound.
Divide the component's molar mass by the entire molecular mass.
You will now have a number between 0 and 1. Multiply it by 100% to get percent composition.
Answer:
pls comment if this helps
Explanation:
small this is because people cant see them
Answer:
Mixing chemicals can be dangerous because you are handling chemicals that are often hazardous.*
Always wear the correct personal protective clothing and equipment when mixing chemicals.
Follow these steps to mix chemicals safely:
Choose a suitable mixing area. The site should be away from plants, people, animals and waterways. It needs to have good lighting and must be well ventilated. There should be first aid equipment and materials to clean up any spills that may occur. Make sure you have lots of clean, fresh water available. The water that you are using in your mixture should be as clean as possible.
Check the product label for the chemical to find out how to mix a solution, including the proportions or volumes needed. If you are unsure, contact the manufacturer or retailer for instructions. I hope it helps. Be safe.