Which best describes a chemical reaction that follows the law of conservation of matter?

Chemistry

1 answer:

Leno4ka [110]2 years ago

5 0

I’m thinking C for this hope it’s right

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A forensic scientist matches a suspect's fingerprint on a drinking glass found in a robbery victim's apartment. What type of ana

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<h2>Answer:</h2>

C) The scientist made an identification

<h2>Explanation:</h2>

The fingerprint is a very certain method for identifying a person, because all human beings have got unique fingerprints. Forensic laboratories have database of all citizens in the area. Hence an identification is done by the results matched with the database information. The two main categories of fingerprint matching techniques are minutiae-based matching and pattern matching and both are them are present in the given database.

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At standard temperature and pressure. 0.500 mole of xenon gas occupies

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Answer:

0.500 mole of Xe (g) occupies 11.2 L at STP.

General Formulas and Concepts:

STP (Standard Conditions for Temperature and Pressure) = 22.4 L per mole at 1 atm, 273 K

<u>Stoichiometry</u>

Mole ratio
Dimensional Analysis

Explanation:

<u>Step 1: Define</u>

<em>Identify.</em>

0.500 mole Xe (g)

<u>Step 2: Convert</u>

[DA] Set up: $\displaystyle 0.500 \ \text{mole Xe} \bigg( \frac{22.4 \ \text{L Xe}}{1 \ \text{mole Xe}} \bigg)$
[DA] Evaluate: $\displaystyle 0.500 \ \text{mole Xe} \bigg( \frac{22.4 \ \text{L Xe}}{1 \ \text{mole Xe}} \bigg) = 11.2 \ \text{L Xe}$