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The answers include:
- A loaf of risen but unbaked bread - chemical change.
- Photo by Elinor D - chemical change.
- Bread dough rising - chemical change.
<h3>What is a Chemical change?</h3>
This involves the formation of a new products from substances. In this scenario, a rising bread contains alcohol which evaporates.
Photographs also fall under this category and is therefore an irreversible chemical change.
Read more about Chemical change here
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<span>molar mass of MgCl2
= 24.32 + 2 x (35.45) = 95.22 g</span><span>
<span>16.4g MgCl2 x (1 mol MgCl2/95.22
g MgCl2) = 0.172 mol MgCl2 </span>
</span>
<span>0.172 mol MgCl2 x (6.022 x 10^23/1 mol
MgCl2) = 10.36 x 10^22 atoms<span> </span></span>
Answer:
Electrons can flow from one atom to another
Explanation:
Fundamentally, opposite charges attract each other, while same charges repel each other. This implies that protons, positively charged species, would repel each other, while electrons, negatively charged species, would also repel each other.
There would be an attraction force between protons and electrons, on the other hand.
Metals tend to lose their electrons to non-metals to form positively charged ions, also known as cations. Non-metals gain these electrons to become negatively charged anions.
Answer:
"The elements are arranged in seven horizontal rows,called periods or series,and 18 vertical columns,called Groups."
Explanation:
Risk*
