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3 years ago

Which substance is a diatomic molecule

Chemistry

2 answers:

aleksandrvk [35]3 years ago

8 0

heteronuclear diatomic molecule: .....hydrogen,chlorine,bromine,nitrogen etc

Neporo4naja [7]3 years ago

4 0

There are a lot of substances. The substances are hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine. Diatomic Molecule consists of atoms from only two different elements.

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Calculate the amount of heat needed to melt 91.5g of solid benzene ( C6H6 ) and bring it to a temperature of 60.6°C . Round your

Inessa [10]

Answer: The amount of heat required for melting of benzene is 20.38 kJ

Explanation:

The processes involved in the given problem are:

$1.)C_6H_6(s)(5.5^oC)\rightleftharpoons C_6H_6(l)(5.5^oC)\\2.)C_6H_6(l)(5.5^oC)\rightleftharpoons C_6H_6(l)(60.6^oC)$

For process 1:

To calculate the amount of heat required to melt the benzene at its melting point, we use the equation:

$q_1=m\times \Delta H_{fusion}$

where,

$q_1$ = amount of heat absorbed = ?

m = mass of benzene = 91.5 g

$\Delta H_{fusion}$ = enthalpy change for fusion = 127.40 J/g

Putting all the values in above equation, we get:

$q_1=91.5g\times 127.40J/g=11657.1J$

For process 2:

To calculate the amount of heat absorbed at different temperature, we use the equation:

$q_2=m\times C_{p}\times (T_{2}-T_{1})$

where,

$C_{p}$ = specific heat capacity of benzene = 1.73 J/g°C

m = mass of benzene = 91.5 g

$T_2$ = final temperature = 60.6°C

$T_1$ = initial temperature = 5.5°C

Putting values in above equation, we get:

$q_2=91.5\times 1.73J/g^oC\times (60.6-(5.5))^oC\\\\q_2=8722.05J$

Total heat absorbed = $q_1+q_2$

Total heat absorbed = $[11657.1+8722.05]J=20379.2=20.38kJ$

Hence, the amount of heat required for melting of benzene is 20.38 kJ

5 0

3 years ago

The addition of an electron and a hydrogen atom to nad to form nadh is an example of what type of chemical reaction

Kruka [31]

The addition of an electron on to the element of hydrogen and ultimately to the electron carrier is an example of reduction. The molecule is becoming reduced or has electrons, and or hydrogen to help facilitate the addition of the electrons on it.

4 0

3 years ago

Draw Lewis structures for the following molecules. Clearly label each center atom, then identify the molecular geometry for each

Norma-Jean [14]

Answer:

The Lewis structure is shown below.

Explanation:

In the molecule given, the central atom is the carbon (C), which must do 4 bonds. The other carbons at the molecule must do 4 bonds too, and the hydrogens must do only one bond. So, the central atom does a double bond with each carbon, and each carbon does a single bond with the two hydrogens they're bonded.

After the bonds, the central carbon has no lone pairs of electrons, so the geometry of the molecule must be linear, as shown below.

8 0

4 years ago

When a fast moving particle runs into a slower moving particle what happens ?

Dvinal [7]

Answer:

It depends upon the mass of the particles also. Assuming equal mass, then the slower moving particle gains some energy, and the faster-moving particle loses energy. However, if the slower moving particle had greater mass, it could transfer energy to the faster-moving particle.

Explanation:

Hope I could help! :)

4 0

3 years ago

What is the reason carbon atoms are the most versatile building blocks of the molecules used by living organisms?

WITCHER [35]

Explanation:

Atomic number of carbon is 6. So, 4 valence electrons are present.

Therefore, it can form 4 covalent bonds with varying bond angles by sharing its valence electrons.

Catenation is also an important property of carbon. Catenation is bonding with atoms of same element. Carbon skeleton can be formed in any direction and can vary in length, branching, and ring structure.

Elements required for making most of the molecules in living organisms are:

C, H, N, O, P and S

Carbon easily form covalents with other 5 elements.

These properties make carbon most versatile building blocks of the molecules used by living organisms.

4 0

3 years ago