1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Kazeer [188]
3 years ago
7

Select the correct use of the compound tms in nmr spectroscopy.a. it is a signal-to-noise enhancerb. it is an internal standard

for signal strengthc. it is a commonly used solvent for samplesd. it is an internal standard for chemical shifts
Chemistry
1 answer:
SpyIntel [72]3 years ago
8 0

TMS stands for Tetramethylsilane

Formula : Si(CH₃)₄

It is used as internal standard for chemical shift

In TMS all the four methyl groups are similar thus all the 12 hydrogen are chemically equivalent. They will show proton NMR at same level and which will appear as a singlet.

We have defined this singlet to be as reference set as zero.

Generally the other organic compounds show chemical shift downfield.So have positive chemical shift with respect to TMS shift.

You might be interested in
What is it called when energy transfers between objects until they reach the same temperature and their particles move at the sa
wel
I think it is kinetic 
enrgy
6 0
3 years ago
Read 2 more answers
A block of chocolate is melting on a hot pan. What type of heat transfer is this? Describe the way heat is transferred between t
klio [65]

Answer:liquid= _________   than the next ________ is heat

Explanation:

8 0
2 years ago
My test is tomorrow and I'm confused about how to solve these. pls halp
Stels [109]

Answer:

Explanation:

  1. <em><u>I</u></em><em><u> </u></em><em><u>don't</u></em><em><u> </u></em><em><u>know</u></em><em><u> </u></em>
  2. <em><u>BCAZ</u></em><em><u> </u></em><em><u>I</u></em><em><u> </u></em><em><u>don't</u></em><em><u> </u></em><em><u>know</u></em>
  3. <em><u>And</u></em><em><u> </u></em><em><u>I</u></em><em><u> </u></em><em><u>don't</u></em><em><u> </u></em><em><u>know</u></em>
  4. <em><u /></em><em><u /></em><em><u /></em><em><u /></em>
5 0
2 years ago
An electron ______ is an area around the nucleus of an atom where an electron is likely to be found.
jek_recluse [69]

Answer:

orbital

hope this helps! <3

4 0
2 years ago
Chlorine is a halogen and has 7 valence electrons, which is represented by crosses on the left
makkiz [27]

There are 2 electrons in the overlapping region.

Chlorine is the second member of the halogen group which are form of family of elements that resemble one another very closely.

The electronic configuration of chlorine shows the arrangement of chlorine electrons within it's atom.

At the outer most shell of the atom is seven electrons, therefore requires only one electron each to attain the octet arrangement.

The overlapping of the orbitals indicates the chemical bond formed by sharing of electrons between atoms called covalent bonding.

To complete it's outer most shell, it will need to share electron with another chlorine atom.

Therefore, there are 2 electrons in the overlapping region.

Learn more here:

brainly.com/question/16396974

3 0
2 years ago
Other questions:
  • Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures. CH4 (g) + H2 O(g) ⇌ 3H2 (
    8·1 answer
  • Which atom has the weakest attraction for electrons in a chemical bond? A) a boron atom B) a calcium atom C) a fluorine atom D)
    11·1 answer
  • Water boils at a temperature of _______ degrees on the celsius scale. a. 212 b. 194 c. 100 d. 90
    11·1 answer
  • What energy transformations occur when using a curling iron?
    8·2 answers
  • Which of the following statements about benzene is true? Multiple Choice
    8·1 answer
  • Look at the spectrums of a star moving towards Earth and a motionless star.
    6·2 answers
  • Please help me I don’t understand this !!!
    7·1 answer
  • I need help on these questions on separating ions in solution. The questions are in the photo.
    10·1 answer
  • water and ammonia are polar. The hydrogen atoms in each have a slight positive charge. What does that tell you about the oxygen
    8·1 answer
  • Name the alkanes please help
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!