Answer:
25.89 × 10²³ molecules
Explanation:
Given data:
Mass of CoCl₂ = 560 g
Number of molecules present = ?
Solution:
Number of moles of CoCl₂:
Number of moles = mass/molar mass
Number of moles = 560 g/ 129.84 g/mol
Number of moles = 4.3 mol
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
4.3 mol × 6.022 × 10²³ molecules /1 mol
25.89 × 10²³ molecules
<span>the chemical equation will be Ni(OH)2(s)------>heat---> NiO(s) + H2O(g)
</span><span>we know that the heat supplied to decompose the compound.In the result the product H2O is assumed to be in the vapor state so that is gas.
hope it helps
</span>
Answer is: A. They opposed the use of energy released during nuclear fission for military purposes.
Hahn, Strassmann and Meitner were not engaged in nuclear weapons research during World War II.
Otto Hahn (1879 - 1968) became a passionate campaigner against the use of nuclear energy as a weapon.
Hahn and Strassmann discovered nuclear fission (nuclear fission of uranium in 1939).
Answer:
d) Nucleus of the element does not change during the react
hope it helps (^^)
# Cary on learning
Answer:
I wouldn’t know I aint never seen two be pretty best friends
Explanation:
