Answer:
tundra swam,sea duck and herbivorous swan
Ok so next time maybe add that it explains the number of covalent bonds in the atom because... (and then explain CaF2 tendencies in following the octet rule, like if it adds to 8 or isn’t completed yet.)
If this isn’t enough I would highly recommend asking your teacher after class even if they don’t like you or are one of THOSE teachers they gotta help you or it’s not fair for them to count you off points.
Explanation:
NaCl is a strong salt of strong base and strong acid whereas HCl is a strong acid.
In the solution both dissociates in the solution into their respective ions as shown below:
NaCl ⇒ Na⁺ + Cl⁻
HCl ⇒ H⁺ + Cl⁻
Hence, the ions Na⁺, Cl⁻ and H⁺ are formed and there is no scope of reaction between them for a gas to evolve. They remain in the hydrated state in water.
Answer:
The oxide is basic, X must be a group two metal
Explanation:
The oxide XO2 must be an inorganic peroxide of a group two element. Inorganic peroxides of group two elements are highly basic because they dissolve in water to yield the corresponding metal hydroxides. These metal hydroxides are strongly basic solutions with a very high pH. Hence X may be Calcium, magnesium, barium, strontium or radium.
Group two metal peroxides include; CaO2, MgO2,BaO2 etc. They all dissolve in water to give corresponding basic solutions. For instance, calcium peroxide reacts with water as follows; CaO2 (s) + 2H2O(l) --------->Ca(OH)2(aq) + H2O2(aq). The production of Ca(OH)2 makes the solution basic. The hydrogen peroxide produced decomposes to water and oxygen.