Answer: the reactant left in excess is H₂, and the amount of excess H₂ is 4.5 moles - 3 moles = 1.5 moles.
Explanation: Moles of N₂ = mass of N₂ / molar mass of N₂
Moles of N₂ = 56 g / 28 g/mol = 2 moles
Moles of H₂ = mass of H₂ / molar mass of H₂
Moles of H₂ = 9 g / 2 g/mol = 4.5 moles
he Solids model formed by atoms as solid spheres for macroscopic measurements, the model has no problems, because the atoms are extremely small
Dalton's atomic model was the first scientifically based model formulated in 1808, it consists of atoms with spheres that cannot be divided and solids are formed by contact between the spheres and chemical compounds are formed by joining atoms of two or more elements, this model is used to approximate solids such as solid spheres there are today.
The size of these spheres (atoms) is very small, nowadays it is known that it is of the order of 10⁻⁹ m, therefore, having a macroscopic crystal more than 10⁻⁶ m in length, it is impossible to measure fluctuations in the sizes of the spheres, since there are 10⁹ spheres in this volume, therefore it is not possible to measure the fluctuations with instruments,
To be able to measure this fluctuation, very small samples and very high resolution transmission microscopes are needed.
In conclusion, the model of the atom as solid spheres for macroscopic measurements, the model has no problems.
Learn more about solids here:
Answer:
Maybe the sizes are too big which means that they need to be smaller because the more compact they are the more smooth and straight they will be because when they are too big it is easier to break them which would lead to a bumpy surface.
Explanation:
I don't know :)
B. kidneys
C. stomach
D. small intestine
An addition of acid increases the solubility of calcium phosphate because the hydrogen ions can easily dissociate and form salts. And example is from the reaction 3H2SO4 + Ca3(PO4)2 → 2H3PO4 + 3CaSO4. CaSO4 is the salt of sulfuric acid and calcium phosphate.
Do you switch charges for ionic or covalent bonds when naming them?
Answer:
ionic
Explanation: