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2 years ago

What are the properties of gas

2 answers:

7 0

Low Density. Gases contain scattered molecules that are dispersed across a given volume and are therefore less dense than in their solid or liquid states. ...
Indefinite Shape or Volume. Gases have no definite shape or volume. ...
Compressibility and Expandability. ...
Diffusivity. ...
Pressure.

Oksana_A [137]2 years ago

5 0

Answer:

1) easy compressed

2) fills its container

3) far more space

Explanation:

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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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3 years ago

Catherine has some seawater. She wants to separate pure water from the seawater.

expeople1 [14]

Answer:

the change is evaporation

Explanation:

the water heats up at the surface of the water and evaporates

4 0

2 years ago

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Using noble gas notation write the electron configuration for the chromium(II) ion

zzz [600]

Since chromium has 24 as its atomic number (which mean that it has 24 proton and 24 electron in neutral ground state), the electron configuration for the chromium would be :

1s^2 , 2s^2 , 2p^6 , 3s^2, 3p^6 , 3d^5 , 4s^1

6 0

2 years ago

You are given a sample of several compounds to separate by paper chromatography. You draw a pencil line exactly 1.00 cm from the

Pavel [41]

Answer:

a) 6.3 cm

b) 8.0 cm

c) 0.7875

Explanation:

(a) The compound has moved above upto 7.3 cm from the bottom of the paper. Let us assume that line is drawn at 1.0 cm mark as the origin of spot. \

Distance traversed by compound= 7.3 - 1.0 cm = 6.3 cm

(b) Distance traversed by the solvent = 9.0 - 1.0 cm = 8.0 cm

= 6.3/8.0 = 0.7875

7 0

2 years ago

Write a neutralization reaction for each acid and base pair.a. HI(aq) and NaOH(aq)b. HBr(aq) and KOH(aq)c. HNO3(aq) and Ba(OH)2(

AVprozaik [17]

Answer:

a. HI(aq)+NaOH(aq) → H2O(l)+NaI(aq)

b. HBr(aq) +KOH(aq) → H2O(l)+KBr(aq)

c. HNO3(aq)+Ba(OH)2(aq) → BaNO3(aq)+H2O(aq)

D. HClO4(aq)+Sr(OH)2(aq) → SrClO4(aq)+H2O(aq)

Explanation:

In a neutralization reaction, an acid and a base react to form water and salt and involves the combination of H+ ions and OH- ions to generate water.

In this case, the atoms have charge positive and negative, the only thing we have to do is to change in the products taking account that positive with negative an vice-versa.

H+I-(aq)+Na+OH-(aq) → H+2O-(l)+Na+I-(aq)

5 0

2 years ago

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