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Aleksandr [31]
3 years ago
13

At 9 a.m. on May 21, a body is discovered near a path in a park. The body is 10 feet from a tree beside the path. The body is pa

rtially buried. The weather is hot and humid. The body has a gray, cheesy-like appearance to it. Which information should be noted for the detectives?
the appearance of the body


location of the body


names of the joggers


time of discovery of the body
Chemistry
2 answers:
katrin2010 [14]3 years ago
4 0

I'm pretty sure its D, Time of discovery of the body. Let me know (:

KIM [24]3 years ago
3 0

Answer:

time of discovery of the body

Explanation:

The time of the discovery of the body is the most important factor among the other given information in the question that should be noted by the detectives. Time plays a very important role in analyzing the cause of crime that took place. Detectives can note down the time of the discovery of the body and try to relate with other evidences found at the crime scene to arrived at the conclusions and finally hunt down the suspect.

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Name the SI base units that are important in chemistry, and give the SI units for expressing the following: (a)length, (b) volum
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Answer and Explanation:

The basic unit which are that are important in chemistry are meter, kilogram ,mol,m^3

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(a) SI unit of length is meter (m)

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A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L
NeTakaya

Answer:

\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}

Explanation:

In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:

P_1V_1=P_2V_2

Now we can substitute any known values into the formula.

Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.

25.0 \ L * 2.05 \ atm = P_2V_2

The volume is decreased to 14.5 liters, but the pressure is unknown.

25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L

Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .

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\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}= P_2

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\frac {25.0  * 2.05 \ atm }{14.5 }=P_2

\frac {50.25\  atm }{14.5 }=P_2

3.53448276 \ atm = P_2

The original values of volume and pressure have 3 significant figures, so our answer must have the same.

For the number we found, that is the hundredth place.

  • 3.53448276

The 4 in the thousandth place (in bold above) tells us to leave the 3 in the hundredth place.

3.53 \ atm \approx P_2

The new pressure is approximately <u>3.53 atmospheres.</u>

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