The correct answer is A. A buffer is a substance that resists small change in the acidity of a solution when an acid or base is added to the solution. Usually, a buffer involves a weak acid or a weak alkali and one of its salt.
Because Nickel is a transition metal that has more than one oxidation number (or charge) whereas magnesium always has a +2 charge.
Im sorry , Im confused reading this . maybe enter a image ?
Answer:How many moles of NH3 are produced from 9 moles of hydrogen? a mot H, 12 mol NH3 = 16 mol NH₂). 3 motta. 3. How many moles of nitrogen are needed to make 6 moles of NH3? ... a. masses, in grams, of all reactants and products.
Explanation:
MORE POWER
Answer:
It helps identify trends and group elements with similar properties.
Explanation:
Arranging the elements according to the atomic mass wouldn't help us have groups and periods with predictable properties that we can have when arranging it according to atomic number. Don't forget that isotopes have different masses.