Answer:
here you go
Explanation:
Halogens are very electronegative. This means that inductively they are electron withdrawing. However, because of their ability to donate a lone pair of electrons in resonance forms, they are activators and ortho/para directing. Electron withdrawing groups are meta directors and they are deactivators.
Answer:
This question is incomplete
Explanation:
This question is incomplete. However, the beaker that contained some water before NaOH were added means that the resulting solution in that beaker will be more dilute. When this diluted sodium hydroxide solution is added to HCl (not hci), the reaction below occurs
HCl + NaOH ⇒ NaCl + H₂O
The reaction above is a neutralization reaction. <u>The concentration of the acid (HCl) will reduce when a base (sodium hydroxide) is added and will also reduce more because of the presence of more water (in the base) which normally reduces the concentration of ions present in an acid or a base to become more dilute.</u>
Cesium Sulfite is formed from the Cs cation and the SO₃⁻² anion. The correct formula for this compound is Cs₂SO₃.
<h3>What is Cation ? </h3>
Cations are positively charged ions. It forms when an element lose one or more electrons.
<h3>
What is Anion ? </h3>
Anions are negatively charged ions. It form when an element gains one or more electrons.
Symbol Cs⁺¹ SO₃⁻²
Valency +1 -2
Formula of the compound is Cs₂SO₃.
Thus from the above conclusion we can say that Cesium Sulfite is formed from the Cs cation and the SO₃⁻² anion. The correct formula for this compound is Cs₂SO₃.
Learn more about the Cation and Anions here: brainly.com/question/20005547
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Answer:
0.068 g
Explanation:
The equation that is used to determine the fraction q remaining in water of volume V₁ after n extractions of volume V₂ is:
qⁿ = (V₁/(V₁ + KV₂))ⁿ
Substituting in the values gives the fraction of caffeine left in the water phase:
q³ = (4.0mL/(4.0mL + 4.6(2.0mL))³ = 0.0278
The fraction of caffeine extracted into the methylene chloride phase is:
1 - 0.0278 = 0.972
The amount of caffeine extracted into the methylene chloride is:
(0.070g)(0.972) = 0.068 g
10) You need to find the atomic mass of every element, which you can get from any periodic table.
a) 6.02x10^23 atoms of Mg
Atomic mass of Mg = 24.3 g/mol
# of mols = 6.02 x 10^23 atoms / 6.02 x 10^23 atoms/mol = 1 mol
mass = 1 mol x 24.3 g/mol = 24.3 g
b) 3.01x10^23 formula units of Ca Cl2
Atomic masses
Ca: 40 g/mol
Cl: 35.5 g/mol
Formula mass: 40g/mol + 2x 35.5g/mol = 111 g/mol
# of mols = 3.01 x 10^23 / 6.02 x 10^23 = 0.5 mol
mass = 0.5 mol x 111 g/mol = 55.5 g
c) 12.4 x 10^15 molecules of CH2O
formula mass = 12 g/ mol + 2 g/mol + 16 g/mol = 30 g/mol
# of mols
mass = [12.4 x 10^15 / 6.02 x 10^23]mol x 30 g/mol = 2.1 x 10 ^(-8) g
3)
a) The polar solute is dissolved in water which is a polar solvent, while the non polar solute is not dissolved in water. This is a rule in chemistry: polar solvents dissovle polar soultes and non polar solvents dissolve non polar soluted.
The extremes of the polar molecules are easily solvated by the water molecules.
b) KI is an ionic compound, which implies that it will ioinize (separare in iones) in water, being in this way be dissolved, while the CO2, which is no polar, will not be easily dissolved in water under normal conditions
