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2 years ago

All living things are made up of molecules that have carbon. O True O False

Chemistry

2 answers:

Wewaii [24]2 years ago

8 0

Answer:

True!

Explanation:

All living things contain carbon in some form. Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates. Carbon's molecular structure allows it to bond in many different ways and with many different elements. So therefore, its true (:

Paha777 [63]2 years ago

6 0

Answer:

True

Explanation:

Because Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates.

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Consider the reactions C2H4(g) + 2O2(g) → 2CO(g) + 2H2O(g) ∆H = −758 kJ mol−1 2C(s) + 2H2(g) → C2H4(g) ∆H = +52 kJ mol−1 H2(g) +

Lilit [14]

C2H4(g) + 2O2(g) → 2CO(g) + 2H2O(g) ∆H1 = −758 kJ mol−1 ....1)

2C(s) + 2H2(g) → C2H4(g) ∆H2 = +52 kJ mol−1 ....2)

H2(g) + O2(g) → H2O(g) ∆H3 = −242 kJ mol−1 ....3)

Now, enthalpy of formation of carbon monoxide is given by :

∆H = ∆H1 + ∆H2 - ∆H3

∆H = ( -758 + 52 - ( -242 ) ) kJ mol−1

∆H = −464 kJ mol−1

Therefore, the enthalpy of formation of carbon monoxide is -464 kJ mol−1.

Hence, this is the required solution.

4 0

3 years ago

According to the arrhenius concept, an acid is a substance that ________.

nydimaria [60]

An acid is a substance that dissociates in water to produce hydrogen ions or protons.

7 0

3 years ago

As members approach the ending of a group or are leaving an ongoing group, it is equally essential that they be encouraged to ex

34kurt

Answer:

The answer is A. Cohesion

Explanation:

The reason is for them to be able to stick together.

7 0

3 years ago

Under the same conditions of temperature and pressure, which of the following gases would behave most like an ideal gas? A)He(g)

umka21 [38]

Answer: He(g)

Explanation: I had the same question and I got the answer right

8 0

3 years ago

Lewis structures for the perchlorate ion (ClO4−) can be drawn with all single bonds or with one, two, or three double bonds. Dra

Vanyuwa [196]

Answer:

The most important resonance structure is 4 (attached picture). Its bon order is $\frac{7}{4}$ or $1\frac{3}{4}$ .

Explanation:

A picture with 4 forms of the perchlorate structure is attached. The first structure has simple bonds. The second structure contains a double bond, the third structure has two double bonds and the fourth structure has three double bonds.

Formal charge = group number of the periodic table - number of bonds (number of bonding electrons / 2) - number of non-shared electrons (lone pairs)

The formal charges in the first structure is +3 in chlorine and -1 in oxygen.

The formal charges in the second structure is +2 in chlorine, -1 in oxygen and 0 in the double bond oxygen.

The formal charges in the third structure is +1 in chlorine, -1 in the single bond oxygens and 0 in the double bond oxygens.

The formal charges in the fourth structure is 0 in chlorine, -1 in the single bond oxygen and 0 in the double bond oxygens.

The most important resonance structure is given by:

Most atoms have 0 formal charge.

Lowest magnitude of formal charges.

If there is a negative formal charge, it's on the most electronegative atom.

Hence, the fourth structure is the mosr important.

The bond order of the structure is:

Total number of bonds: 7

Total number of bond groups: 4

Bond order= $\frac{7}{4} =1\frac{3}{4}$

5 0

3 years ago