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3 years ago

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Chemistry

1 answer:

Nikitich [7]3 years ago

6 0

Answer:

108- Hassium

11- sodium

56- Barium

92- uranium

25- manganese

103- lawrencium

10- neon

22- titanium

8- oxygen

14- silicon

32- germanium

39- yttrium

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I am having trouble solving it pls help

MAXImum [283]

Answer:

1. 0.097 s

2. 0.420 M

Explanation:

To solve both questions we'll use the formula:

[A]ₓ = [A]₀ - kt

Where [A]ₓ is the concentration of A at a given time; and [A]₀ is the initial concentration.

1) We input the data given by the problem:

0.167 M = 0.700 M - 5.48 M/s * t

And solve for t:

t = 0.097 s

2) We input the new data:

[A]ₓ = 0.500 M - 0.361 M/s * 0.220 s

and solve for [A]ₓ:

[A]ₓ = 0.420 M

5 0

3 years ago

The air above earth’s surface is at different temperatures. What is responsible for this difference in temperature?

tino4ka555 [31]

The Mesosphere, like the troposphere layer, has a decrease in temperature with altitude because of the decreases in the density of the air molecules. Thermosphere: As the altitude increases, the air temperature increases.

3 0

3 years ago

Read 2 more answers

Balance this chemical equation.

Natasha_Volkova [10]

Answer:

2 C2H6 + 7 O2 = 4 CO2 + 6 H2O

Explanation:

The Bold Numbers are what you should put. This is balanced

8 0

3 years ago

As much sugar as will dissolve is added to hot water. The water is then cooled, and all of the sugar remains dissolved in the so

fenix001 [56]

Solutions containing the maximum amount of solute that they can hold are known as saturated solutions.

3 0

3 years ago

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Use the observation in the first column

Lyrx [107]

Answer:

A. Substance E

A. Substance C

A. Substance A

Explanation:

Given that:

At 4 °C, Substance E has a vapor pressure of 86. torr and Substance F has a vapor pressure of 136. torr

Which has a higher boiling point?

A. Substance E

B. Substance F

C. Neither,EandF have the same boiling point

The vapor pressure varies inversely proportional to the boiling point.

$\mathbf{vapor \ pressure \ \ \alpha \ \ \dfrac{1}{boiling \ point}}$

Therefore, the lower the vapor pressure, the higher the boiling point.

At 4°C, Substance E with a lower vapor pressure of 86. torr will have a higher boiling point from the given information.

Recall that :

$\mathbf{vapor \ pressure \ \ \alpha \ \ \dfrac{1}{enthalpy \ of \ vaporization}}$

therefore, the lower the enthalpy of vaporization, the higher the vapor pressure at any given temperature.

Given that:

Substance C has an enthalpy of vaporization smaller than that of substance D. Then, substance C has a higher vapor pressure.

We've earlier said that:

The vapor pressure varies inversely proportional to the boiling point.

$\mathbf{vapor \ pressure \ \ \alpha \ \ \dfrac{1}{boiling \ point}}$

Therefore, the lower the vapor pressure, the higher the boiling point.

As such, Substance A will have a higher boiling point.

6 0

3 years ago

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