Answer:
2.48 g
Explanation:
From the question given above, the following data were obtained:
Number of atoms = 2.53×10³⁴ atoms
Mass of Ni =?
From Avogadro's hypothesis,
we understood that 1 mole of any substance contains 6.02×10²³ atoms.
Therefore, 1 mole of Ni contains 6.02×10²³ atoms.
Recall:
1 mole Ni = 59 g
Therefore, 59 g of Ni contains 6.02×10²³ atoms.
Finally, we shall determine the mass of 2.53×10³⁴ atoms of Ni. This can be obtained as follow:
6.02×10²³ atoms = 59 g
Therefore,
2.53×10³⁴ = 2.53×10³⁴ × 59 / 6.02×10²³
2.53×10³⁴ atoms = 2.48 g
Thus, the mass of 2.53×10³⁴ atoms of Ni is 2.48 g.
42700 milliliters would be the answer...
Hope this helps!
Hey, its alright bro! I gotchu.
Im pretty sure the galactic symbol is the same reference to the symbol of the element on the periodic table.
For an example (Hydrogen) is H
So if im correct im pretty sure its referring to the symbols for each element
Hopefully this helps
<u>Given:</u>
Amount of CO2 produced = 62 g
<u>To determine:</u>
Amount of O2 consumed
<u>Explanation:</u>
If ethanol (C2H5OH) is the fuel used during combustion then the reaction is:
C2H5OH + 3O2 → 2CO2 + 3H2O
Based on the reaction stoichiometry:
3 moles of O2 will produce 2 moles of CO2
# moles of CO2 produced = 62 g/ 44 g.mol-1 = 1.4091 moles
Therefore,
# moles of O2 consumed = 1.4091 *3/2 = 2.1137 moles
Mass of O2 used up = 2.1137 moles * 32 g/mole = 67.64 g
Ans: The mass of O2 used up during combustion of ethanol would be around 68 g
Answer:
Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number
Explanation:
