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kiruha [24]
3 years ago
13

Which of the following is an important application of hydrogen bonding?

Chemistry
2 answers:
Travka [436]3 years ago
8 0
Answer-Holding DNA together
lakkis [162]3 years ago
4 0

Answer:

Holding of DNA together

Explanation:

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Why chemically did the prescribing of thalidomide for morning sickness in pregnant women lead to tragic consequences, including
Dominik [7]

Answer:

See explanation

Explanation:

The drug thalidomide with molecular formula C13H10N2O4 was widely prescribed by doctors for morning sickness in pregnant women in the 1960s.

The drug was sold as a racemic mixture  (+)(R)-thalidomide and (-)(S)-thalidomide.

Unfortunately, only the  (+)(R)-thalidomide exhibited the required effect while (-)(S)-thalidomide is a teratogen.

This goes a long way to underscore the importance of separation of enantiomers in drug production.

Therefore, all the teratogenic effects observed when using the drug thalidomide was actually as a result of the presence of (-)(S)-thalidomide, the unwanted enantiomer.

3 0
3 years ago
. Calculate the number of moles in 56g of H20
svetoff [14.1K]
<h3>Answer:</h3>

3.11 moles

<h3>Explanation:</h3>

We are given 56 g of water (H₂O)

Required to calculate the number of moles of water.

  • The relationship between moles, mass and molar mass is given by;
  • Moles = Mass ÷ molar mass

in this case;

  • Mass of water = 56 g
  • Molar mass of water = 18.02 g/mol

Therefore;

Moles of water = 56 g ÷ 18.02 g/mol

                         = 3.11 moles

Therefore, moles of water in 56 g will be 3.11 moles

8 0
2 years ago
Which of these is an example of a physical change? sugar dissolving in warm water iron rusting in the presence of moist air wood
WARRIOR [948]
The correct option is; SUGAR DISSOLVING IN WARM WATER.
There are two types of change in chemistry; physical and chemical changes.
A physical change is a type of change in which no new substance is formed while a chemical change is a type of change in which a new substance is formed. 
Dissolving sugar in warm water is a physical change because no new substance is formed and the sugar can easily be recovered from the water by evaporating the water.
3 0
3 years ago
Read 2 more answers
What is the mass, in grams, of a cube of copper that has a volume of 62.2 cm3?
SashulF [63]

) Copper density= 8.96 g/cm³ Copper volume= 51.3c.m.3  Copper density = M/V8.96= M/51. M= 459.68g.m.

7 0
3 years ago
Are preferred because the results can be generalized to a larger population.
ryzh [129]

The most appropriate word among the group of answer choices to fill in the blank is: a. Random sample surveys.

Sampling can be defined as a process used to collect or select data (objects, observations, or individuals) from a larger statistical population using specific procedures.

The various types of sampling used by researchers includes the following;

  • Systematic sampling.
  • Convenience sampling.
  • Stratified sampling.
  • Cluster sampling.
  • Random sampling.

A random sample survey is also referred to as a simple random sample (SRS) and it can be defined as a sampling technique that involves randomly selecting a subset of a larger population. Also, any result obtained through the use of a random sample survey can be generalized and applied to a larger population.

In conclusion, scientists and researchers prefer random sample surveys because their results can be generalized to a larger population.

Find more information: brainly.com/question/17090308

5 0
3 years ago
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