Number 2 is the correct answer
Answer is (3) - ratio of neutrons to protons.
Isotopes are the atoms which have same atomic number but have different number of neutrons of same element.
Atomic nucleus can be stable or unstable. The stability of isotopes is based on neutron/ proton ratio. Unstable nucleus tries to become stable by emitting radiations.
Answer:
25 g/hr
Explanation:
Remember that the rate of reaction refers to the rate at which reactants are used up or or the rate at which products appear.
Hence;
Rate of reaction = mass of reactant used up/time taken
Mass of reactant used up= 2g
Time taken = 5 minutes or 0.08 hours
Rate of reaction = 2g/0.08 hours = 25 g/hr
Empirical formula: Li4OH
Answer:
1 mole: 44.771 g
1 gram = 0.022 mole
Explanation:
Element: Li
Percentage by mass: 62.01%
Number of atoms: 4
Mass of atom;: 6.941
Element: O
Percentage by mass: 35.74%
Number of atoms: 1
Mass of atom: 15.9994
Element: H
Percentage by mass: 2.25%
Number of atoms: 1
Mass of atom: 1.00794
They can be stopped by a piece of paper.
