Answer:
a) the minimun of acetic anhydride required for the reaction is 2.175 g (CH3CO)2O
b) V acetic anhydride = 2.010 mL
Explanation:
C6H4OHCOOH + (CH3CO)2O ↔ C9H8O4 + C2H4O2
⇒ mol salicylic acid = 2.94 g C6H4OHCOOH * ( mol C6H4OHCOOH / 138.121 g ) = 0.0213 mol C6H4OHCOOH
⇒ mol acetic anhydride = 0.0213 mol C6H4OHCOOH * ( mol (CH3CO)2O / mol C6H4OHCOOH ) = 0.0213 mol (CHECO)2O
⇒ g acetic anhydride = 0.0213 mol * ( 102.1 g/mol ) = 2.175 g CH3CO)2O
b) V = 2.175 g (CH3CO)2 * ( mL / 1.082 g ) = 2.010 mL (CH3CO)2O
<span>D.) Oxygen would acquire a stable arrangement of electrons by bonding with two atoms of "Magnesium"
[ As Mg has 2 extra electrons & their size are quite similar ]
Hope this helps!</span>
Answer:
it is less dense than water
Explanation:
odyssey ware
The sun solar energy produce all the energy
Explanation:
(a) Dry ice is solid carbon dioxide and its chemical formula is solid .
(b) Sodium chloride is commonly known as salt in daily life. Hence, chemical formula of salt is NaCl.
(c) Laughing gas is also known as dinitrogen monoxide. Hence, its chemical formula is .
(d) Marble (chalk limestone) is chemically known as calcium carbonate. Hence, its chemical formula is .
(e) Baking soda is chemically known as sodium bicarbonate. Hence, its chemical formula is .
(f) Ammonia has a chemical formula as .
(g) Water has a chemical formula as .
(h) Milk of magnesia is a base and it is chemically known as magnesium hydroxide. Its chemical formula is .
(i) Epsom salt is most often found as heptahydrate of sulfate mineral epsomite. Its chemical formula is usually . If not present as a heptahydrate then its chemical formula is where, value of x can be equal to 0 to 7.