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2 years ago

Two or more atoms can be held together shared

1 answer:

6 0

Depends:
1) A metal and another metal: Metalic bonds.
2) A metal and a non-metal: Ionic bonds (Transfer of electrons).
3) A non-metal and another non-metal: Covalent bonds (Sharing of electrons).

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The pictured compound has which of the following bonds?

Veseljchak [2.6K]

Answer: There are C - C bonds and C - H bonds.

trust me! I took a test with this question and got 100! :)

6 0

3 years ago

What is mass in g of 15.5 moles of calcium?

padilas [110]

Answer:

621.2090000000001 grams

Explanation:

1 moles Calcium to grams = 40.078 grams

15.5*40.078 = 621.2090000000001 g

4 0

2 years ago

The standard entropy of liquid methanol at 298K is 126.8 J/K-mol and its heat capacity is 81.6 J/K-mol. Methanol boils at 337K w

USPshnik [31]

Explanation:

First, we will calculate the entropies as follow.

$\Delta S_{2} = C_{p_{2}} ln \frac{T_{2}}{T_{1}}$ J/K mol

As, $T_{1}$ = 298 K, $T_{2}$ = 373.8 K

Putting the given values into the above formula we get,

$\Delta S_{2} = C_{p_{2}} ln \frac{T_{2}}{T_{1}}$ J/K mol

= $81.6 ln (\frac{373.8}{298})$

= 18.5 J/K mol

Now,

$\Delta S_{3} = \frac{\Delta H_{vap}}{T_{b.p}}$

= $\frac{35270 J}{373.8}$

= 94.2 J/mol K

Also,

$\Delta S_{4} = C_{p_{4}} ln \frac{T_{2}}{T_{1}}$

= $43.89 \times ln (\frac{800}{373.8})$

= 33.4 J/K mol

Now, we will calculate the entropy of one mole of methanol vapor at 800 K as follows.

$\Delta S_{T} = \Delta S^{o}_{1} + \Delta S_{2} + \Delta S_{3} + \Delta S_{4}$

= (126.8 + 18.5 + 94.2 + 33.4) J/K mol

= 272.9 J/K mol

Thus, we can conclude that the entropy of one mole of methanol vapor at 800 K is 272.9 J/K mol.

7 0

3 years ago

What is the temperature of 1.2 moles of Helium gas at 1950 mm Hg if it occupies 15,500 ml of volume?

n200080 [17]

Replace with

1950

1950mmHg and simplify.

1.2

1950

500

4 0

3 years ago

Read 2 more answers

Which of the following tend to possess the same number of outer electrons? A. all molecules with the same number of atoms B. all

exis [7]

Answer:

the answer would be "B"

Explanation:

Elements with the same number of valence electrons are found in the same column of the Periodic Table. All elements in the first column of the Periodic Table have 1 valence electron in an s orbital. These elements are known as Group 1A metals or alkali metals.

5 0

3 years ago