Atomic number of gold, 
= 79 means there are 79 electrons in per atom of gold.
Atomic mass of gold = 196.967 gm
0.990 oz of gold is given.
Now, converting 
So, 
Now, for determining the number of moles, the formula for number of moles is:
Substituting the values:
1 mole of 
So, for 0.1425 mole of 
Since 1 atom of gold has 79 electrons so,
Number of electrons = 
So, number of electrons in 0.990 oz of pure gold coin is 
.
D. Adding more of the chemical will heat the water but only up to a certain temperature
<h3>Further explanation</h3>
Chemical changes are changes in the process that produce new substances that are different from the initial/ forming substances. Chemical changes are usually known as chemical reactions. So there are products/reactions and reactants and there is a change in the molecule/particle
The chemical reaction is usually followed by the release of heat, gas, change in color, precipitate substance etc
The heat that occurs in the addition of chemicals is caused by the reaction with water. But there is a constant rise in temperature when water reaches <em>its maximum capacity to react with these chemicals.</em>
Evidenced by the addition of 15 g and 20 g of chemicals, the temperature changes are constant
Answer:
they will die because they need to be in salt water
If you can’t figure it out You should l look it up in the internet
An atom having 52 protons and 54 electrons would have an atomic number of 52 and a net charge of -2. This element would be 52 Te 2-, or choice A.
