N = m/M
= 200g/(12.01g/mol + 2(16.00g/mol))
=4.54mol
Answer:
b
Explanation:
because it is moving so it has kinetic energy
Answer:
chromium:oxygen=1:2
Explanation:
total mass=2.16g
mass of chromium=1.34g
mass of oxygen=2.16g-1.34g=0.82g
chromium oxygen
mass:1.34g 0.82
RAM:52 16
divide the mass with the RAM
0.02577 0.05125
divide by smallest number to find ratio
1 2
ratio of chromium to oxygen=1:2
Answer:
(a) CH3CH2CH2CH2CH3(l)
(b) CH3CH2OH(l)
- Dipole-dipole interaction
- Dispersion forces
- Hydrogen bonding
(c) H2CO(l)
(d) O2(l)
Explanation:
Dispersion forces are those forces that occur between two non polar molecules.They form the weakest bonds.Here electrons of one molecule is attracted to the nucleus of the other molecule. Example are;
- Interaction of two methyl (-CH₃) group
- Interaction between nitrogen gas , N₂ molecules
- Interaction between oxygen gas ,O₂ molecules
Dipole-Dipole interaction happens when two polar molecules interact.Positive charges in one molecule is attracted to negative charge of another molecule.Examples
- Chloroform (CHCl₃)
- Ammonia (NH₃)
Hydrogen bonding are created when an hydrogen atom bonded to an electronegative atom is attracted to a another electronegative atom.Example is the hydrogen bond between oxygen atom and hydrogen is water (H₂O).
Answer:
The two elements are POLONIUM and RADIUM.
Explanation:
Maria Curie is a French physicist and chemist, though she was of a Polish naturals. She was the first woman to receive a Noble Price which she earned for conducting leading and head way research on radioactivity. She discovered the theory of radioactivity; also the techniques isolating radioactive isotopes. These helped her and her husband discover Polium and Radium.
