Answer:
Explanation:
Hello!
In this case, since the interaction between hot iron and cold water allows the heat transfer from iron to water and therefore we can write up the following energetic equation:
Whereas the heat terms can be written in terms of mass, specific heat and temperature change:
So we solve for the mass of iron as follows:
Now, we plug in the given data to obtain:
Best regards!
A solution's pH will be a number between 0 and 14. A solution with a pH of 7 is classified as neutral. If the pH is lower than 7, the solution is acidic. When pH is higher than 7, the solution is basic. These numbers describe the concentration of hydrogen ions in the solution and increase on a negative logarithmic scale. For example, If Solution A has a pH of 3 and Solution B has a pH of 1, then Solution B has 100 times as many hydrogen ions than A and is therefore 100 times more acidic.
It is essential for accurate results that the correct volume of blood is sampled to achieve a correct concentration (and dilution, if liquid heparin is used), and that blood and anticoagulant are well mixed immediately after sampling.
We can say an atom is electrically neutral if both electron (for electric charge) and proton (for positive charge) have the exact same amount
Since the number are needed in some amount to be considered stable (*2-1st level<span>-need 8 for valence level) , </span><span> The atom that has 7 protons and 7 electrons would be considered enough</span>
Hydrogen (H) was first, followed by helium (He).