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3 years ago

The longer the bond, the smaller the bond enthalpy. the longer the bond, the smaller the bond enthalpy. false true

Chemistry

1 answer:

Temka [501]3 years ago

5 0

True

As the shorter the bond, the stronger it is hence more energy will be required to overcome this bond

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What are the components of a nucleotide?

Eva8 [605]

Answer:

a nitrogen containing base, a pentose (five-carbon) sugar, and one or more phosphate groups

Explanation:

found this information on, newworldencyclopedia.com

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3 years ago

A sample of gaseous neon atoms at atmospheric pressure and 0 °c contains 2.69 * 1022 atoms per liter. the atomic radius of neon

omeli [17]

Explanation

Radius of neon atom : 69 pm = $69\times 10^{-12} m$

Volume occupied by the one atom: $\frac{4}{3}\pi r^3$

$=\frac{4}{3}\times 3.14\times(69\times 10^{-12} m)^3=1.37\times 10^{-30} m^3$

given that $2.69\times 10^{22}$ atoms are present in 1L

1 L = 0.001 $m^3$

The volume occupied by the $2.69\times 10^{22}$ neon atoms

$2.69\times 10^{22}\times 1.37\times 10^{-30} m^3=3.68\times 10^{-8} m^3$

Fraction of volume occupied by the neon atom:

$=\frac{3.68\times 10^{-8} m^3}{0.001 m^3}=3.68\times 10^{-11} m^3$

$3.68\times 10^{-11} m^3$

The fraction of of volume occupied by the neon atom is very less than the 1 L which indicates the presence of large amount of empty space between the atoms of the gas.

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3 years ago

How many moles of hydrogen do you need to react with 0.85 moles of nitrogen?

katen-ka-za [31]

Answer:

6 moles

Explanation:

You have a 1:3 ratio between nitrogen gas and hydrogen gas

8 0

3 years ago

4. Calculate the relative molecular masses of the following substances [RAM: H=1, O=16, S=32, C=12, N=14] a. CH2(NH2)COOH b. H2S

8090 [49]

Answer:

a. CH2(NH2)COOH

$molecular \: mass = (12 \times 2) + (5 \times 1) + (14 \times 1) + (16 \times 2) \\ = 24 + 5 + 14 + 32 \\ = 75 \: grams$

b. H2SO4

$molecular \: mass = (2 \times 1) + 32 + (16 \times 4) \\ = 2 + 32 + 64\\ = 98 \: grams$

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3 years ago

Why is bromine more electronegative than iodine?

gavmur [86]

Answer

Accordingly the order of electronegativity of the given elements would be: Fluorine > Chlorine > Bromine > Iodine. ( Fluorine has the highest electronegativity.)

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3 years ago