An isotope of nitrogen containing 7 neutrons would be nitrogen-7
Answer:
The simple definition of water hardness is the amount of dissolved calcium and magnesium in the water. Hard water is high in dissolved minerals, largely calcium and magnesium.
Explanation:
B. Light energy and heat energy!
This is because the thermal energy which is the heat. As you know fire heats up and burns, a lit candle would do just the seem. Also the fire is bright enough to light up an area!
Answer:
40 Grams
Explanation:
Fe2O3 is 2 parts Iron 3 parts Oxygen.
Assuming the molecular weights of both are equivalent (<em>ideal elemental law</em>), it is a 2:3 ratio, or 2/5 of the total.
2/5 of 100 is 40, so the answer is
40 grams