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3 years ago

What is the side of DNA

1 answer:

3 0

The shape of DNA is a double helix, which is like a twisted ladder. The sides of the ladder are made of alternating sugar and phosphate molecules. The sugar is deoxyribose. The rungs of the ladder are pairs of 4 types of nitrogen bases.

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Use complete sentences to differentiate between acids and bases on the basis of touch. Give an example of each type. PLEASE HELP

aleksklad [387]

Explanation:

Bases have a slippery feel when touched but acids do not have a slippery feel.

An acid is a substance that interacts with water to produce excess hydroxonium ions, H₃O⁺ in an aqueous solution. Here are some of its properties:

Their dilute solutions have a sour taste.
They have a burning effect on the skin and are highly corrosive on metals.
They have the ability to change the colors of indicators.
They react with bases to form salt and water only.

Examples of acids are:

Hydrochloric acid HCl

Tetraoxosulphate (VI ) acid H₂SO₄

A base is a substance that interacts with water to produce excess hydroxide ions, OH⁻ in an aqueous solution.

They typically have a bitter taste.
They have a soapy feel
They are electrolytes
They also change the color of indicators

Examples are:

Potassium hydroxide KOH

Sodium hydroxide NaOH

Learn more:

Neutralization brainly.com/question/6447527

#learnwithBrainly

5 0

4 years ago

For IR radiation with û = 1,130 cm 1, v=__THz

Dmitry [639]

<u>Answer:</u> The frequency of the radiation is 33.9 THz

<u>Explanation:</u>

We are given:

Wave number of the radiation, $\bar{\nu}=1130cm^{-1}$

Wave number is defined as the number of wavelengths per unit length.

Mathematically,

$\bar{\nu}=\frac{1}{\lambda}$

where,

$\bar{\nu}$ = wave number = $1130cm^{-1}$

$\lambda$ = wavelength of the radiation = ?

Putting values in above equation, we get:

$1130cm^{-1}=\farc{1}{\lambda}\\\\\lambda=\frac{1}{1130cm^{-1}}=8.850\times 10^{-4}cm$

Converting this into meters, we use the conversion factor:

1 m = 100 cm

So, $8.850\times 10^{-4}cm=8.850\times 10^{-4}\times 10^{-2}=8.850\times 10^{-6}m$

The relation between frequency and wavelength is given as:

$\nu=\frac{c}{\lambda}$

where,

c = the speed of light = $3\times 10^8m/s$

$\nu$ = frequency of the radiation = ?

Putting values in above equation, we get:

$\nu=\frac{3\times 10^8m/s}{8.850\times 10^{-4}m}$

$\nu=0.339\times 10^{14}Hz$

Converting this into tera Hertz, we use the conversion factor:

$1THz=1\times 10^{12}Hz$

So, $0.339\times 10^{14}Hz\times \frac{1THz}{1\times 10^{12}Hz}=33.9THz$

Hence, the frequency of the radiation is 33.9 THz

7 0

3 years ago

Consider the reaction below to answer the following questions (4) a. The nucleophile in the reaction is _______ b. The Lewis aci

KATRIN_1 [288]

The question is incomplete, the complete question is shown in the image attached to this answer.

Answer:

a) Br^-

b) FeCl3

c) slower

d) see the first attached image

Explanation:

Aromatic compounds undergo electrophilic substitution sections in the presence of the appropriate electrophile.

In the reaction above, the Br^- nucleophile attacks the Lewis acid FeCl3. Recall that the nitro group is meta directing hence the incoming Br^+ electrophile is directed towards the meta position as shown in the image attached.

Note that the nitro group deactivates the ring towards electrophilic substitution hence the reaction is slower with nitrobenzene than with unsubstituted benzene.

5 0

3 years ago

What is meant by the biodegradability of soap molecules

Flura [38]

Answer:

The biodegradability of soap moleculea means the soap molecules are degradable in nature it doesn't causes water pollution as comparing as detergent.....

4 0

3 years ago

A solution of the weak acid HA is prepared by dissolving 2.70 g of HA in 100.0 mL water. The solution is titrated, and the equiv

ELEN [110]

Answer:

i.2iu

Explanation:

3 0

3 years ago