The only answer we can choose
<span>B.
energy needed to break chemical bonds.</span>
Answer:
C. hydrocyanic acid
Explanation:
The mixture of a weak acid (As hydrocyanic acid, HCN), with its conjugate base (Na⁺CN⁻) produce a buffer effect in the solution due the equilibrium:
HCN ⇄ CN⁻ + H⁺
Now, when NaOH (A base) is added to the mixture, the reaction with <em>HCN </em>is:
NaOH + HCN → Na⁺CN⁻ + H₂O
As the OH⁻ of NaOH are not affecting directly the H⁺ concentration, <em>the pH does not increase dratically.</em>
<em />
Right answer is:
<em>C. hydrocyanic acid
</em>
Mass of iron: 86.65
Moles of iron: 85.65 / 56 = 1.53
Mass of oxygen: 118.37 - 86.65 = 32.72
Moles of oxygen: 32.72 / 32 = 0.99 1.02
The molar ratios of the two are approximately similar; therefore, Dawson's conclusion is more correct.
Typically Aluminum Oxide is used for sandpaper or a cheaper alternative for industrial diamond.
Answer:
A. they work together with the environment.
Explanation:
Because work together is what keep the environments clean and tidy.