The phenomenon is known as the Greenhouse Effect.
When the sun's energy reaches the Earth, some is reflected into space, but the rest is absorbed by gases and warms the atmosphere. The phenomenon is known as the Greenhouse Effect.
Answer:
yes, they were
Explanation:
The history of the metric system began in the Age of Enlightenment with notions of length and weighttaken from natural ones, and decimal multiples and fractions of them. The system became the standard of France and Europe in half a century. Other dimensions with unity ratios[Note 1] were added, and it went on to be adopted by the world.
Answer:
A. Dipole-dipole forces; B. dipole-dipole forces;
C. ion-dipole forces; D. ion-dipole forces
Explanation:
A. HF
HF is a weak acid but a highly polar molecule. The strongest intermolecular force with water is an especially strong dipole-dipole force (hydrogen bonding) of the type
H-F· · ·H-OH and H₂O· · ·H-F
B. CH₃OH
CH₃OH has a highly polar O-H bond. The strongest intermolecular force with water is the especially strong dipole-dipole force (hydrogen bonding):
CH₃(H)O· · ·H-OH and CH₃O-H· · ·OH₂
C. CaCl₂
CaCl₂(s) ⟶Ca²⁺(aq) + 2Cl⁻(aq)
CaCl₂ separates into hydrated ions in solution. The strongest intermolecular force with water is ion-dipole attraction.
Ca²⁺· · ·OH₂ and Cl⁻· · ·H-OH
D. FeBr₃
FeBr₃(s) ⟶Fe³⁺(aq) + 3Br⁻(aq)
FeBr₃ separates into hydrated ions in solution. The strongest intermolecular force with water is ion-dipole attraction.
Fe³⁺· · ·OH₂ and Br⁻· · ·H-OH
Calculate the molar it’s of nitric acid
Answer:
V₁ = 12.1 mL
Explanation:
Given data:
Volume of NaOH required to neutralize = ?
Molarity of NaOH = 4.8 M
Volume of HCl = 20 mL
Molarity of HCl = ?
Solution:
Chemical equation:
HCl + NaOH → NaCl + H₂O
In neutralization reaction the equal amount of H⁺ from acid and OH⁻ from base react to form water and salt is also formed.
Formula:
M₁V₁ = M₂V₂
M₁ = molarity of NaOH
V₁ = Volume of NaOH
M₂ = molarity of HCl
V₂ = volume of HCl
Now we will put the values.
4.8 M × V₁ = 2 M × 29 mL
4.8 M × V₁ =58 M. mL
V₁ = 58 M. mL / 4.8 M
V₁ = 12.1 mL
