Alkaline Earth Metals are the elements located in the second period from the left of the periodic table. These elements lose two electrons to form the stable octet when forming an ionic bond, resulting in a net charge of +2. Because they’re trying to get rid of those electrons to get to the stable octet, it’s easy to remove them - this means that the ionization energy of these elements is relatively low. Finally, since they’re looking to get rid of electrons, they certainly aren’t trying to gain any, meaning that their electronegativity is relatively low.
The correct answers are A and D.
Answer:
Explanation:
The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements, such as hydrogen H, oxygen O and chlorine Cl. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas.
The covalent bond between two atoms can be polar or nonpolar. If the atoms are equal, the bond will be nonpolar (since no atom attracts electrons more strongly). But, if the atoms are different, the bond will be polarized towards the most electronegative atom, because it will be the atom that attracts the electron pair with more force. Then it will be polar.
It can occur in a molecule that the bonds are polar and the molecule is nonpolar. This occurs because of the geometry of the molecule, which causes them to cancel the different equal polar bonds of the molecule.
In carbon tetrachloride the bonds are polar, but the tetrahedral geometry of the molecule causes all four dipoles to cancel out and the molecule to be apolar.
C. Nickel, hope this helps!
Answer:
A) 0.831 M
B) 1.07 m
C) 26.2%
D) 0.0189
Explanation:
A) First we convert the mass of Pb(NO₃)₂ to moles:
- 275 g ÷ 331 g/mol = 0.831 mol Pb(NO₃)₂
Then we divide it by the total volume (1.00 L) to calculate the molarity:
- 0.831 mol / 1.00 L = 0.831 M
B) We convert the grams of water to kilograms:
Then we divide the Pb(NO₃)₂ by the kilograms of water:
- 0.831 mol / 0.775 kg = 1.07 m
C) We divide the mass of Pb(NO₃)₂ by the total mass of the solution:
*100% 
* 100% = 26.2%
D) We calculate the moles of water:
- 775 g H₂O ÷ 18g/mol = 43.1 mol H₂O
Then we divide the Pb(NO₃)₂ moles by the total number of moles:
= 0.0189
Answer: Distance the car has driven
Explanation:
The speed equation is speed=distance/time and since we already know time we need to know distance to solve for speed
