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Gelneren [198K]
3 years ago
12

I AM GIVING 15 + 8 POINTS AND THE BRAINLIEST TO THE PERSON WHO CAN HELP ME WITH THESE QUESTIONS PLS!!!!!!

Chemistry
1 answer:
ss7ja [257]3 years ago
3 0
250f degrees
-3.0c
360f  boiling -4.0c freezing
34g/mol 
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Round to the nearest whole number of 99.59
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A gas occupies the volume of 215ml at 15C and 86.4kPa?
kherson [118]

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About 0.1738 liters

Explanation:

Using the formula PV=nRT, where p represents pressure in atmospheres, v represents volume in liters, n represents the number of moles of ideal gas, R represents the ideal gas constant, and T represents the temperature in kelvin, you can solve this problem. But first, you need to convert to the proper units. 215ml=0.215L, 86.4kPa is about 0.8527 atmospheres, and 15C is 288K. Plugging this into the equation, you get:

0.8527\cdot 0.215=n \cdot 0.0821 \cdot 288\\n\approx 7.754 \cdot 10^{-3}

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1V=7.754 \cdot 10^{-3} \cdot 0.0821 \cdot 273\\V\approx 0.1738L

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Sound waves move the slowest through which medium :<br> water<br> ice<br> air<br> wood
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The decomposition of hydrogen peroxide (H2O2(aq)) is proposed to follow a reaction mechanism of: Step 1: H2O2(aq) + Br–(aq)→H2O(
lys-0071 [83]

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Option (1) Br– is the catalyst, and the reaction follows a faster pathway with Br– than without

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Let us consider the equation below:

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