Skin is a barrier that serves as one of the body's first lines of defense against harmful microbes. Specialized immune cells within skin tissue help to fight invading organisms. Yet the skin hosts diverse communities of beneficial bacteria, collectively known as the skin microbiota.
<span>0.15 = 255.0 / X ---> </span><span>X = 255.0 / 0.15 </span>
<span>X = 1700g </span>
<span>(H2O + NaCl) - (NaCl) = H2O </span>
<span>1700g - 255g = 1445g
</span>
The mass of water would be 1445g.
A. The temperatures of the iron bars after 30 minutes would be less than 160°C because heat would be lost to the surroundings.
Finding the difference in math usually means to subtract to numbers. In the case of your problem though, I think the correct answer would just be 4...