Answer:
2311.2 cal
Explanation:
540 cal / g * 4.28 g = 2311.2 cal
Answer:
Explanation:
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In this case, given the balanced reaction:
We can see a 2:4 mole ration between permanganate ion (118.9 g/mol) and manganese (IV) oxide (86.9 g/mol), that is why the resulting mas of this last one turns out:
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Effusion is the process of a gas being poured out through a hole diametrically smaller than the structural exit of the container.
A lighter gas effuses faster than a heavier gas.
Thus gas A has a lower density and effuses slower than Gas B.
Answer:
=5 protons, 6 neutrons,5 electrons
All atoms of boron always contain 5 protons, as that defines its atomic number 5, Boron atomic number 5 has five electrons in its ground state.
Commonly Boron will lose 3 electrons leaving 2 electrons in its most common ionic form,all atoms of boron always contain 5 protons, as that defines its atomic number 5
The mass number for boron-11 is 11 (it's given to you), and recall that the number of protons plus the number of neutrons equals the mass number.
A 11B atom thus contains 11(mass number)−5(protons)=6 neutrons
The atomic number gives the number of protons,protons which have a positive charge are balanced by an equal number of electrons in a neutral atom.
Boron number 5 has five protons and therefore as a neutral atom also has five electrons.
Boron has an electron configuration of 1s22s22p1
The most stable electron configuration for Boron is 1s2 + 3 charge,by losing three electrons Boron can achieve the stable electron structure of Helium
Explanation:
Answer:
Molar mass of calcium is 40,078 g / mol
Explanation:
Molar mass (M) is the ratio of the mass to the mass of the substance and is expressed in grams per mole (g / mol).
The molar mass of a substance corresponds/it is equal to the relative atomic or relative molecular mass with the addition of the unit g/mol.
The relative atomic mass as well as the relative molecular mass are the basis for expressing the molar mass (M), the mass of one mole of a substance.