Student #2: Protons determine the atomic number, and valence electrons show what period the element is in, hope this helps :)
Answer:
0.5cm²
Explanation:
the volume is found by dividing the mass over the density
v=m/d
=7g/14g/cm²
=0.5cm²
i hope this helps
243 grams of zinc oxide would be produced by the thermal decomposition of 375 grams of zinc carbonate.
<h3>What is Thermal Decomposition?</h3>
Heat causes one component to break down into two or more other substances in a process known as thermal decomposition. The heat is used to dissociate the bonds that held the original molecules' atoms together, hence the reaction often uses up more heat energy than it produces.
According to the periodic table:
zinc molar mass is 65.38 grams
12 gm is the molar mass of carbon
oxygen molar mass is 16 grams
ZnCO3 molar mass is 65.38 + 12.3 + 16.4 = 125.38 gm.
ZnO has a molar mass of 65.38 + 16 = 81.38 grams.
Therefore, the mass of ZnO in 375 gm is equal to (375 x 81.38) / 125.38, or 243.4 gm.
To learn more about Thermal Decomposition visit:
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Which is better
oop?
Or oof?
I personally use oof a lot more :D
<u>Answer:</u> The main group metal produce a basic solution in water and the reaction is 
<u>Explanation:</u>
Main group elements are the elements that are present in s-block and p-block.
The metals that are the main group elements are located in Group IA, Group II A and Group III A.
Oxides are formed when a metal or a non-metal reacts with oxygen molecule. There are two types of oxides which are formed: Acidic oxides and basic oxides.
- Acidic oxides are formed by the non-metals.
- Basic oxides are formed by the metals.
When a metal oxide is reacted with water, it leads to the formation of a base.
The general formula of the oxide formed by Group II-A metals is 'MO'
The chemical equation for the reaction of metal oxide of Group II-A and water follows:
Hence, the main group metal produce a basic solution in water and the reaction is
