Answer: Water is a polar molecule since it has an unequal sharing of electrons. Water is chemically written as H2O meaning it consists of hydrogen and oxygen atoms. Hydrogen is number one in the Periodic Table whereas oxygen is number 14. As a result, the configuration of oxygen is 2.8.4 while that of hydrogen is 1. When two hydrogen atoms combine with one oxygen atom, two out of the four electrons in oxygen form the strong bond in water. The resulting effect is that there is an unequal sharing of electrons since two electrons remain unused. The hydrogen end becomes partially positive while the oxygen end is partially negative. Furthermore, the oxygen atom has a stronger attractive force hence drawing more atoms to it. Subsequently, there arises a charge imbalance within the molecule. Besides water, hydrogen fluoride is also a polar molecule.
Explanation: I hope this answerd your question have a good day :)
Answer:
<h2>The answer is 5.18 g</h2>
Explanation:
The mass of a substance when given the density and volume can be found by using the formula
<h3>mass = Density × volume</h3>
From the question
volume = 22.5 mL
density = 0.23 g/mL
We have
mass = 0.23 × 22.5 = 5.175
We have the final answer as
<h3>5.18 g</h3>
Hope this helps you
Answer:
The correct answer is 0.058
Step-by-step explanation:
The mole fraction of KI (X) in the solution is the number of moles of KI divided into the total number of moles of the solution (nt):
X= moles KI/nt
First we have to calculate the molecular weights of the components of the solution: KI and water (H₂O):
Molecular weight (Mw) of KI:
Mw(KI)= 39 g/mol + 127 g/mol = 166 g/mol
Molecular weight of H₂O:
Mw(H₂O)= (1 g/mol x 2) + 16 g/mol = 18 g/mol
Then, we calculate the number of moles there is of each component in the solution by dividing the mass into Mw:
Moles of KI= mass KI/Mw(KI) = 3.4 g/166 g/mol = 0.020 mol KI
Moles of H₂O= mass H₂O/Mw(H₂O)= 5.8 g/18 g/mol = 0.322 mol H₂O
Thus, the total moles of solution will be:
nt= moles KI + moles H₂O= 0.020 mol + 0.322 mol = 0.342 mol
Finally, we divide the moles of KI into the total moles of solution (nt) to obtain the mole fraction (X):
X= moles KI/nt = 0.020 mol/0.342 mol = 0.058
Answer:
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Explanation:
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Answer:
The relative mass of electron is 0.0005
Explanation:
Atoms are the fundamental unit of matter. Every thing in the universe that occupy space and have mass is called matter. we can say that every matter is composed of atoms. while the atom is composed of subatomic particles called electron proton and neutron.
Subatomic particles Relative charge Relative mass
Proton +1 1
Neutron 0 1
Electron -1 0.0005
Electron:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
Symbol = e⁻
Mass= 9.10938356×10⁻³¹ Kg
electrical charge on electron= -1.6022 × 10⁻¹⁹ C
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
Proton and Neutron:
An atom consist of positively charged central core (nucleus) that is made up of Proton and neutron. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Symbol of proton= P⁺
electrical charge on proton= +1.6022 × 10⁻¹⁹ C
Mass of proton=1.672623×10⁻²⁷ Kg
Symbol of neutron= n⁰
Mass of neutron=1.674929×10⁻²⁷ Kg
electrical charge on neutron= 0