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hjlf
3 years ago
11

What is the modification of the small intestinal wall that serves to increase surface area?

Chemistry
1 answer:
astra-53 [7]3 years ago
4 0

Answer:

Villi

Explanation:

Villi are folds on the small intestine lining that increase the surface area to facilitate the absorption of nutrients.

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If a diatomic molecule has a vibrational force constant of k=240 kg s-2 and a reduced mass of 1.627x10-27 kg, its vibrational fr
asambeis [7]

Answer:

2040 cm-1

Explanation:

The vibrations frequency is obtained from;

v=1/2πc √k/μ

Where;

k= force constant = 240kgs-2

μ= reduced mass = 1.627×10^-27 kg

c= speed of light= 3×10^10cms-1

v= 1/2×3.142×3×10^10√240/1.627×10^-27

v= 5.3×10^-12 × 3.84×10^14

v= 20.4×10^2

v= 2040 cm-1

8 0
3 years ago
What volume (in mL ) of 0.200   M NaOH do we need to titrate 40.00 mL of 0.140   M HBr to the equivalence point?
Ugo [173]
NaOH + HBr =⇒ NaBr + H2O

35.0 ml HBr x 1 liter/1000 mL x 0.140 moles HBr/ liter = 0.0049 moles HBr

0.0049 moles HBr x 1mole NaOH/1mole HBr = 0.0049 moles HBr

0.0049 moles HBr x 1 liter NaOH/0.200 moles NaOH x 1000 mL/1liter= 24.5 mL NaOH
7 0
3 years ago
Read 2 more answers
What's the structure of Cl2O? Is it polar or non-polar?
lisabon 2012 [21]
Answer: C) Bent or angular, polar
Explanation:
The central atom oxygen has two lone pairs and two bond pairs in . The number of electron pairs are 4, that means the hybridization will be and the electronic geometry of the molecule will be tetrahedral. But as there are two lone pair of atoms around the central oxygen atom, repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be bent shape.
The compound is polar as the net dipole moment of oxygen - fluoride bonds do not cancel each other out.

3 0
3 years ago
Which explains why krypton was most likely given this name
slavikrds [6]

Answer:

Krypton is named after the Greek word that means "secret." Which explains why krypton was most likely given this name? Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.

Explanation:

5 0
3 years ago
What are groups 1, 2, and 3 examples of on the periodic table
Brut [27]
I believe it has something to fmdo with the s orbital 1 and 2 and the p orbitald for the 3
3 0
3 years ago
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