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3 years ago

I’m really confused can someone help me?

Chemistry

2 answers:

Nimfa-mama [501]3 years ago

8 0

The 2nd energy level can hold a maximum of 8 electrons.

Gre4nikov [31]3 years ago

5 0

Answer:

the second energy level can hold a maximum of eight electrons

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A carbon-carbon triple bond is found in a molecule of

Masteriza [31]

A triple bond is a type of covalent bond. It involves a sigma bond and two pi bonds (each bond involves 2 electrons). A carbon atom is capable of 4 bonds...a carbon-carbon triple bond is found in all alkynes.

5 0

4 years ago

Starting at atmospheric pressure, by how much must the pressure change in order to lower the boiling point of water by 1° C? You

Marina86 [1]

Answer:

ΔP = -3556.36 Pa

Explanation:

Atmospheric pressure, P = 101300 Pa

Latent heat of boiling water, $L_{B} = 2.256 * 10^{6} J/kg$

Boiling point at atmospheric pressure, T = 373.15 K

ΔT = 1 K

The change in volume as the water boils to vapor will be

$\triangle V = V_{v} - V_{l}$

Since the volume of vapor ( $V_{v}$ ) is far greater than the volume of liquid ( $V_{l}$ )

$\triangle V = V_{v}$

Using the ideal gas equation:

$PV_{v} = RT\\V_{v} = RT/P$

R = 8.314 J/mol-K

$V_{v} = \frac{8.314 * 373.15}{101300} \\V_{v} = 0.0306 m^{3}$

ΔV = 0.0306 m³

Molecular weight of water, MW = 0.018 kg/mol

Using the Clausius - Clapeyron equation:

$\triangle P = \frac{L_B \triangle T}{T \triangle V}* MW\\\triangle P = \frac{2.256 * 10^{6} *1}{373.15* 0.0306}* 0.018$

ΔP = -3556.36 Pa

But the pressure change is said to lower the boiling point of water, only a negative pressure change will lower the boiling point.

ΔP = 3556.36 Pa

4 0

3 years ago

7. If all of the forces on an object are balanced, the object?

dolphi86 [110]

Answer:

Is balanced

Explanation:

4 0

3 years ago

What is the chemical formula for nickel (III) oxide?

HACTEHA [7]

I think it is Ni2O3

4 0

4 years ago

How is a cation different from a anion

masya89 [10]

Cation means a positively charged ion. Anion is a negative one

5 0

3 years ago