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3 years ago

Someone please help me with number 5. no idea what it is.

Chemistry

1 answer:

KATRIN_1 [288]3 years ago

5 0

Answer is Sodium Hydroxide.

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scoundrel [369]

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Explanation:

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3 years ago

What is the pressure inside a cylinder when the volume changes from 12.49 dm3 to 47.32 dm3 with an initial pressure of 7.257 x 1

zvonat [6]

Answer:

The pressure inside becomes : 202.646 KPa

Explanation:

Given ,

The temperature inside the cylinder is constant
The number of moles of the gas inside the cylinder will also be constant because it's a closed one.

Now according Boyle's law ,

The pressure of a gas of fixed mass is inversely proportional to its volume at a constant temperature.

Thus ,

$P_1V_1=P_2V_2\\$

$P_1$ is the initial pressure $7.257*102*10^3 Pa$
$P_2$ is what we need to find
$V_1 = 12.49dm^3$ - initial volume
$V_2 = 47.32dm^3$ - final volume

∴

$7.527*102*10^3*12.49=P_2*47.32\\P_2=2.02646*10^5Pa$

The pressure inside becomes : 202.646 KPa

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3 years ago

Newlands law of octaves was rejected mainly because of which of the following?

hammer [34]

The correct answer for this question is letter C. Newland's Law of Octaves was rejected mainly because it could not hold good for elements heavier than calcium. The relationship between the octaves started to break down since it was unable to accommodate newly discovered elements.

3 0

3 years ago

I need to rearrange the letters to form a word. plz help

alekssr [168]

12. Substances

13. Isotopes

14. Atomic

Hope I Helped!

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3 years ago

Predict the products for nacl+cabr2

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nabr + cacl2 are the products

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