Answer:
There are 146 neutrons in Uranium-238
There are 90 electrons in Thorium-234
Old but good do a volcano <span />
ANSWER: Eardrum
EXPLANATION:
The vibrations from the eardrum set the ossicles into motion. The ossicles are actually tiny bones — the smallest in the human body. The three bones are named after their shapes: the malleus (hammer), incus (anvil) and stapes (stirrup). The ossicles further amplify the sound.
Answer:
The shape of the BF3 molecule is best described as trigonal planar.
Explanation:
The Lewis Structure for BF3 is like this:
_ _
| F | | F |
\ /
B
|
| F |
---
It forms three angles of 120° each. The bonds are in the same planar that's why it is trigonal planar and they are exactly the same.
Boron and Fluorine have 3 covalent bonds, produced by electronic promotion that enables the 2py and 2pz orbitals, leaving an electron to pair in the 2px. So boron will have 3 possible electrons to pair in 2s1, 2px and 2py, remember that electronic configuration for B is 1s2, 2s2, 2p1
By hybridization between the orbitals 2s2 and 2p1, the electrons of F, can joined to make the covalent bond. The new B configuration is 1s2, 2s1, 2px1, 2py1 (these last three, hybrid orbitals)
The shipping container have a density of 27.77 kg/m³.
Explanation:
The formula for density is:
density = mass / volume
volume of the container = 9 m × 4 m × 3 m
volume of the container = 108 m³
density of the container = 3000 kg / 108 m³
density of the container = 27.77 kg/m³
Learn more about:
density
brainly.com/question/952755
brainly.com/question/6838128
#learnwithBrainly
