Common Gases Used in Laboratories Are Generally Obtained from Pressurized $\rarr$

question 45

Short Answer

Common gases used in laboratories are generally obtained from pressurized metal gas cylinders, but for small amounts of occasionally-used gases, it is sometimes easier just to prepare them chemically.For example, oxygen gas can be prepared by heating KMnO₄(s)according to the following chemical reaction:
2KMnO₄(s) $\rarr$ K₂MnO₄(s)+ MnO₂(s)+ O₂(g)
How many grams of KMnO₄ would you need to produce 0.27 moles of O₂, assuming 100% conversion? The molar mass of KMnO₄ is 158.034 g/mol.

Comprehend the application and interpretation of the intention to treat method.

Distinguish between positive and negative correlations.

Grasp the concept of selection bias and its effect on research outcomes.

Understand the methodology and application of regression discontinuity in research.

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Definitions:

Authorization to Confess Judgment

A legal provision where a debtor gives a creditor the right to enter a judgment against them without trial if they fail to meet the terms of an agreement.

Negotiability

This term refers to the characteristic of a financial instrument that enables it to be transferred or assigned from one party to another with ease and legal effect.

I.O.U.

An informal document acknowledging a debt owed.

Negotiable Instrument

A document guaranteeing the payment of a specific amount of money, either on demand or at a set time, with the payee’s name written on the document.