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Alex_Xolod [135]
3 years ago
14

Decide if the following is a good, better or poor observation.

Chemistry
1 answer:
Anna71 [15]3 years ago
8 0
The answer to this question I think would be 2: Better
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A 0.245-L flask contains 0.467 mol co2 at 159 °c. Caculate the pressure using Van der Walls equation
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Answer:

The right answer is "60.56 atm".

Explanation:

As we know,

Vander wall's equation is:

⇒ (P+\frac{n^2 a}{v^2} )(v-nb)=nRT

or,

⇒ P=\frac{nRT}{(v-nb)}-\frac{n^2 a}{v^2}

Here,

a = 3.59 L² atm mol⁻²

b = 0.0427 L mol⁻¹

By putting the values in the above equation, we get

⇒ P=\frac{0.467\times 0.0821\times 432}{0.245-0.467\times 0.0427}

       =\frac{(0.467)^2\times 3.49}{(0.245)^2}

       =73.61-13.05

       =60.56 \ atm

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2 years ago
Water softeners often replace calcium ions in hard water with sodium ions. since sodium compounds are soluble, the presence of s
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3 years ago
When a 11.9 gram sample of copper metal is dropped into a glass of cold water, the temperature of the copper drops from 55°C to
Ugo [173]

Answer:

I need this one asap

Explanation:

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Which explanation best compares the movement of particles in the three states of matter
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Particles in a solid state can only vibrate. In a liquid state, they slide against each other. And in a gas state, they move freely, bouncing and bumping into each other.

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Chemical reactions between metals and non- metals result in the formation of
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When metals and non-metals react the metal element loses it's electron to the non-metal which result in it becoming positively charged (cation) while the non-metal who has gained more electrons than the proton in it's nucleus thus off-setting the neutral balance become negatively charged.  Once this happens, the ions become attracted to each other (opposites attract) and result in them forming very strong IONIC BONDS.
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