Answer:
2
Explanation:
The atom shown in the image has 2 core electrons.
Electrons are the negatively charged particles within an atom. Therefore the total number of electrons surrounding the nucleus in the given specie is 7.
So;
We have 2 core electrons
And 5 valence electrons
The core electrons are the inner orbital electrons.
The valence electrons are the outermost electrons.
Answer:
¨molecular compounds are formed by the sharing of electrons, and ionic compounds are formed by the transfer of electrons¨
Explanation:
Answer:
96.5 grams is the mass of the silver block.
Explanation:
Heat lost by iron will be equal to heat gained by the water

Mass of iron = 
Specific heat capacity of silver= 
Initial temperature of the silver= 
Final temperature = 

Mass of water= 
Specific heat capacity of water= 
Initial temperature of the water = 
Final temperature of water = 



On substituting all values:

we get, 
96.5 grams is the mass of the silver block.
Answer:
<h2>The answer is 70 kPa</h2>
Explanation:
In order to find the pressure if the volume were increased to 375 ml we use Boyle's law
That's

where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
Since we are finding the final pressure

From the question
P1 = 105 kPa = 105 , 000 Pa
V1 = 250 mL
V2 = 375 mL
So we have

We have the final answer as
<h3>70 kPa</h3>
Hope this helps you
A precipitate will form since BaSO₄ is insoluble in water.