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3 years ago

A scientist who collects and analyzes DNA from a crime scene is a

Chemistry

2 answers:

Ksenya-84 [330]3 years ago

7 0

Answer:

Its a forensic scientist :D

Explanation:

I took a test and got it wrong but it showed the right answer and its a forensic scientist

(don't ask how i got it wrong i was rushing!!)

Sliva [168]3 years ago

6 0

Answer:

forensic scientist

Explanation:

forensic science is the discipline in which professionals use scientific means to analyze physical crime evidence. this evidence is then presented in court in order to help determine the innocence or guilt of a specific suspect.

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Which statement about astrology is not true? the positions of the planets at the time of birth have influence on a persons life

Anna71 [15]

Answer:

The positions of the planets at the time of birth have influence on a person's life

7 0

3 years ago

A gaseous fuel mixture stored at 747 mmHg and 298 K contains only methane (CH4) and propane (C3H8). When 11.1 L of this fuel mix

Alisiya [41]

Answer:

$M_f=38.8\%$

Explanation:

From the question we are told that:

Pressure $P=747mmHg$

Temperature $T=298K$

Volume $V=11.1$

Heat Produced $Q=780kJ$

Generally the equation for ideal gas is mathematically given by

$PV=nRT$

$n= (747/760) *11.1/ (0.0821*298)$

$n=0.446mol$

Therefore

$x+y=0.446$

$x=0.446-y .....1$

Since

Heat of combustion of Methane=889 kJ/mol

Heat of combustion of Propane=2220 kJ/mol

Therefore

$x(889) + y(2220) = 760 ...... 2$

Comparing Equation 1 and 2 and solving simultaneously

$x=0.446-y .....1$

$x(889) + y(2220) = 760 ...... 2$

$x=0.173$

$y=0.273$

Therefore

Mole fraction 0f Methane is mathematically given as

$M_f=\frac{x}{n}*100\%$

$M_f=\frac{1.173}{0.446}*100\%$

$M_f=38.8\%$

7 0

3 years ago

The winter solstice is the shortest day of the year in the northern hemisphere. Please select the best answer from the choices p

Natalka [10]

Answer: The given statement is true.

Explanation:

Winter solstice is day at the hemispheres where day light is for shortest period and night longs for longest period. It is December 20 on northern hemisphere and 20 June on southern hemisphere.

During this time sun is farthest from the earth's both hemispheres.

Hence, the given statement is true.

5 0

4 years ago

Read 2 more answers

Question 30 (10 points) All unauthorized experiments are prohibited . O True False

denpristay [2]

Answer:

All unauthorized experiments are prohibited. You are allowed to enter the chemical preparation/storage area any time you need to get an item. Laboratory aprons should be worn during all lab activities. It's okay to pick up broken with our bare hand as long as the glass is placed in the trash.

Explanation:

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3 years ago

Why you gotta be lonely at farmers only dot com

Alik [6]

Answer:

but you don't have to be lonely at farmers only .com

5 0

3 years ago