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3 years ago

Why is H2S called an analytical agent?

Chemistry

1 answer:

sergeinik [125]3 years ago

7 0

Answer:

Hydrogen sulfide is an newly recognized signical molecule with very potent cytoprotective actions.

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Results published in journals provide the most reliable information about new discoveries because _____

Tasya [4]

They are a primary resource

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3 years ago

Read 2 more answers

A 256 mL sample of HCl gas is in a flask where it exerts a force (pressure) of 67.5 mmHg. What is the pressure of the gas if it

Effectus [21]

Answer:

The pressure in the new flask would be $128\; \rm mmHg$ if the $\rm HCl$ here acts like an ideal gas.

Explanation:

Assume that the $\rm HCl$ sample here acts like an ideal gas. By Boyle's Law, the pressure $P$ of the gas should be inversely proportional to its volume $V$ .

For example, let the initial volume and pressure of the sample be $V_1$ and $P_1$ . The new volume $V_2$ and pressure $P_2$ of this sample shall satisfy the equation: $P_1 \cdot V_1 =P_2 \cdot V_2$ .

In this question,

The initial volume of the gas is $V_1= 256\; \rm mL$ .
The initial pressure of the gas is $P_1 = 67.5\; \rm mmHg$ .
The new volume of the gas is $V_2 = 135\; \rm mL$ .

The goal is to find the new pressure of this gas, $P_2$ .

Assume that this sample is indeed an ideal gas. Then the equation $P_1 \cdot V_1 =P_2 \cdot V_2$ should still hold. Rearrange the equation to separate the unknown, $P_2$ . Note: make sure that the units for $V_1$ and $V_2$ are the same before evaluating. That way, the unit of

$\begin{aligned} & P_2\\ &= \frac{P_1 \cdot V_1}{V_2} \\ &= \frac{256\; \rm mL \times 67.5\; \rm mmHg}{135\; \rm mL} \\ & \approx 128\; \rm mmHg\end{aligned}$ .

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4 years ago

What is the volume, in liters, of 576 grams of so2 gas at stp?

katen-ka-za [31]

The volume in liters of 576 grams of SO2 gas at STP is calculated as below

calculate the moles of SO2 = mass/molar mass

= 576 g/64 g /mol = 9 moles

At STP 1mole =22.4 L
what 9 mole =? liters

by cross multiplication

= 22.4 L x 9 moles/ 1moles = 201.6 liters

5 0

3 years ago

Under what conditions do real gases behave most ideally.

katrin [286]

Answer:

Under high temperatures and low pressure, gases behave the most ideal.

Explanation:

Low pressure reduces the effect of the finite size of real particles by increasing the volume around each particle, and a high temperature gives enough kinetic energy to the particles to better overcome the attractions that exist between real particles. (Prevents sticking.)

In summary, real gases behave more like ideal gases when they are far away from a phase boundary, (condensation or freezing).

3 0

2 years ago

Rank these species by their ability to act as an oxidizing agent. cu+ mg2+ fe2+

natita [175]

Explanation:

The species or elements which gain electrons and reduces itself are known as oxidizing agent or oxidant.

Ability of an element to act as an oxidizing agent depends on its electrode potential.

The electrode potential of $Cu^{+}$ is 0.52 V.

The electrode potential of $Fe^2+$ is -0.41 V.

The electrode potential of $Mg^{2+}$ is -2.38 V.

Greater is the value of electrode potential, stronger will be the oxidizing agent.

Therefore, rank of these species by their ability to act as an oxidizing agent are as follows.

$Cu^{+}$ > $Fe^2+$ > $Mg^{2+}$

7 0

3 years ago

Why is H2S called an analytical agent?​

Why is H2S called an analytical agent?