Answer:
B.
Explanation:
Valence electrons located in the outermost energy level.
Answer : The volume in mL of the sodium carbonate stock solution is 364 mL.
Explanation :
According to dilution law:
where,
= molarity of aqueous sodium carbonate
= molarity of aqueous sodium carbonate stock solution
= volume of aqueous sodium carbonate
= volume of aqueous sodium carbonate stock solution
Given:
= 1.00 M
= 1.58 M
= 575 mL
= ?
Now put all the given values in the above formula, we get:
Therefore, the volume in mL of the sodium carbonate stock solution is 364 mL.
Answer:
A communicable disease
Explanation:
Diseases that can be transferred are known as communicable diseases.
Answer:
d) tetrahedral
Explanation:
Given that the central atom is attached to the four group.
Number of bond pairs = 4
Number of lone pairs = 0
The formula is .
According to VSEPR theory,
The central atom has 4 bond pairs and 0 lone pair. Hybridization is sp³. The geometry is tetrahedral which has an angle of 109.5°.
Methane, posses a tetrahedral geometry as four atoms of hydrogen are attached to the central atom which is carbon.
Hence. D option is correct.