Isometry, or I think you mean Isometric or Anisometric, is two molecular entities that are superposable or can be made superposable by reflection of one of them in a mirror.
The atomic number, the number of protons and the number of electrons.
Answer:
C. ammonia, nitrogen gas, nitrous oxide, nitrite, nitrate
Explanation:
To establish the oxidation number of nitrogen in each compound, we know that the sum of the oxidation numbers of the elements is equal to the charge of the species.
Nitrite ion (NO₂⁻)
1 × N + 2 × O = -1
1 × N + 2 × (-2) = -1
N = +3
Nitrous oxide (NO)
1 × N + 1 × O = 0
1 × N + 1 × (-2) = 0
N = +2
Nitrate ion (NO₃⁻)
1 × N + 3 × O = -1
1 × N + 3 × (-2) = -1
N = +5
Ammonia (NH₃)
1 × N + 3 × H = 0
1 × N + 3 × (+1) = 0
N = -3
Nitrogen gas (N₂)
2 × N = 0
N = 0
The order of increasing nitrogen oxidation state is:
C. ammonia, nitrogen gas, nitrous oxide, nitrite, nitrate
The answer is 6.71 moles. A sample of 97.994 grams of phosphoric acid is equal to one mole H3PO4. This molar mass of phosphoric acid is the amount or mass in grams in one mole of H3PO4. The number of moles of the H3PO4 compound can be determined using the molar mass of phosphoric acid:
moles H3PO4 = 658 grams H3PO4 * (1mol H3PO4 / 97.994 g H3PO4)
= 6.71 mol
To convert on unit to another unit, a conversion factor is needed to multiply in the value given. For the value given above, we have to convert it from miles per gallon to kilometers per liter. The factors to be used are:
1 mile = 1.61 kilometers;
1 gallon = 3.79 liters.
<span>34.0 miles / gallon ( 1.61 kilometers / 1 mile ) ( 1 gallon / 3.79 L ) = 14.44 kilometer / liter</span>
