To supply oxygen to the body, the respiratory system works closely with the circulatory system. As oxygen is taken in into the lungs, it travels through blood vessels, which then circulate oxygen-rich blood to cells and tissues.
Pure substances are substances<span> that are made of only one type of atom or molecule....</span>
<span>Metals tend to lose electrons and form electro-positive ions / cations.</span>
Answer:
Because the molecules have not been in water so they are not moving around each other
Explanation:
Answer:
Explanation:
pH= 7 is neutral, pH<7 - acidic solutions,
pH>7 - basic solution.
The more value of pH, the more basic solution is.
So, the solution with pH = 12 is more basic.
