3 years ago

What does chemistry have to do with drug testing

1 answer:

5 0

Answer:

Forensic drug chemists analyze samples of unknown materials including powders, liquids and stains to determine the chemical identity or characteristics of the compounds that make up the sample. samples submitted as evidence in a drug-related case can contain one compound or a mixture of many compounds.

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People's actions can cause air pollution. People can plant trees to help reduce air pollution.

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Answer:

Explanation:

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3 years ago

The south end of Earth's axis is tilted toward the Sun in?

DochEvi [55]

Answer:

December

Explanation:

Southern Hemisphere experiences winter in July, therefore it experiences Summer in December.

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2 years ago

A sample of gas occupies 9.0 mL at a pressure of 500.0 mm Hg. A new volume of the same sample is at a pressure of 750.0 mm Hg.

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Use the relatio P1V1=P2V2 ( p= pressure, v= volume)- assuming number of moles of gas and temperature are kept constant.

1.) A. Larger- pressure increases from 500mmHg to 750mmHg.

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3 years ago

Why is helium in group 18 on the periodic table though it only has 2 valence electrons?

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<span> strictly speaking, a molecule has at least two atoms. ... Atoms with full valence electron shells are stable. Full Text[ edit ] The noble gases are a group of chemical elements that make up Group 18 on the periodic table.</span>

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3 years ago

Match each element to the number of electrons in its valence shell.

irinina [24]

Answer:

C: 4

H: 1

Mg: 2

O : 6

Explanation:

You can quickly find out the number of valence electrons by looking at where the element is on the periodic table and referring to the table that is attached.

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1 year ago