A Laboratory Vacuum Pump Can Reduce the Pressure in a Chamber

question 29

Multiple Choice

A laboratory vacuum pump can reduce the pressure in a chamber to 1.0 × 10^-7 Pa.If the volume of the chamber is 0.500 m³ and the temperature is 27°C,how many molecules are left inside the chamber? (N_A = 6.022 × 10²³ molecules/mol,R = 8.31 J/mol ∙ K)

• A)1.2 × 10¹³
• B)2.4 × 10¹³
• C)1.2 × 10¹²
• D)2.4 × 10¹²
• E)1.2 × 10¹⁴

Recognize the importance of environmental factors and community infrastructure in disease prevention.

Understand the historical development of public health initiatives and their impact on community health.

Analyze the role of government and non-governmental organizations in the advancement of public health.

Identify key figures and their contributions to public health and nursing.

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Definitions:

Earnings Per Share

The portion of a company's profit allocated to each outstanding share of common stock, serving as an indicator of a company's profitability.

Corporate Income Statement

is a financial document that outlines a corporation’s revenues, expenses, and profits or losses over a specific period.

Income From Continuing Operations

The earnings generated from a company's ongoing core business operations, excluding extraordinary items.

Cumulative Effect

The aggregate impact of an accounting change or policy adjustment over the period before the adjustment is implemented, often recognized immediately in financial statements.