Answer:
The answer is option 2.
Explanation:
Given that the formula to find kinetic energy is K.E = 1/2×m/v² where v represent the speed of an object. So if the speed increases, kinetic energy also increase.
Therefore, kinetic energy has the highest amount at 60 mph.
Metals:
<span>Distinguishing luster (shine)
</span><span>Malleable and ductile (flexible) as solids
</span><span>Conduct heat and electricity
</span><span>Metallic oxides are basic, ionic
</span><span>Cations in aqueous solution
</span>
Nonmetals:
<span>Non-lustrous, various colors
</span><span>Brittle, hard or soft
</span><span>Poor conductors
</span><span>Nonmetallic oxides are acidic, compounds
</span><span>Anions, oxyanions in aqueous solution
</span>
Exothermic reactions are chemical reactions that proceed with the release of heat energy. I contrast, endothermic reactions involve absorption of heat.
The enthalpy change (ΔH) for exothermic reactions is negative while that of endothermic reactions is positive.
In the given examples, reactions that show a negative ΔH are:
NH3 + HCl ------- NH4Cl ΔH = -176 KJ/mol
2Mg + O2 -------- 2MgO ΔH = -1203 kj/mol
C + O2 ---- CO2 ΔH = -393.5 kj/mol
CH4 + 2O2 ----------------- CO2 + 2H2O ΔH = -891 kj/mol