BCHE 111/L Chemistry for Engineers Manual

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Questions and Answers

What does 'LD' stand for in the term 'LD50'?

Lethal Density

Lethal Dose (correct)

Lethal Duration

Lethal Distance

Which of the following is NOT a type of toxin mentioned in the text?

Cardiotoxins (correct)

Neurotoxins

Nephrotoxins

Hematotoxins

What does the term 'LC50' refer to?

The amount of a substance that causes a 50% decrease in body weight in test animals.

The volume of a substance needed to kill 50% of test animals.

The concentration of a chemical that kills 50% of test animals in a specified time. (correct)

The time it takes for a chemical to kill 50% of test animals.

What is the definition of an 'incident' as described in the text?

An accident that releases a substance that could be hazardous. (A) Signup and view all the answers

Which of the following is NOT a characteristic of oxidizers as defined in the text?

Oxidizers require energy input to react with organic materials. (C) Signup and view all the answers

What is the definition of a 'hazard' as described in the text?

A condition that could cause damage to people, property, or the environment. (A) Signup and view all the answers

Which type of toxin specifically damages the cells and tissues of the kidneys?

Nephrotoxins (A) Signup and view all the answers

What is the primary purpose of Personal Protective Equipment (PPE)?

To protect oneself from exposure to hazardous substances. (C) Signup and view all the answers

What is the formula for calculating density?

Density = Mass / Volume (C) Signup and view all the answers

What is the specific gravity of a substance with a density of 2.0 g/mL?

2.0 (D) Signup and view all the answers

If an object has a density less than that of water, what will it do when placed in water?

It will float. (D) Signup and view all the answers

How is the density of gases typically expressed?

g/L (C) Signup and view all the answers

If an object displaces a volume of water equal to its own volume, what can be inferred about its density in relation to water?

The object has the same density as water. (B) Signup and view all the answers

What is the density of water at 4°C in g/mL?

1.0000 g/mL (A) Signup and view all the answers

Which of the following is true about the relationship between specific gravity and density?

Specific gravity is a unitless value derived from density. (C) Signup and view all the answers

What happens to an object that is denser than water when placed in water?

It will sink. (B) Signup and view all the answers

What is the density of Mercury at 20°C?

13.55 g/mL (C) Signup and view all the answers

Which gas has a density closest to that of Methane?

Ammonia (A) Signup and view all the answers

On which temperature scale does water freeze at 0 and boil at 100?

Celsius (D) Signup and view all the answers

Which substance has the highest density among the listed solids?

Gold (C) Signup and view all the answers

What is the reference density for solids and liquids when comparing densities?

Water (D) Signup and view all the answers

At what temperature does Helium have a density of 0.178 g/mL?

0°C (B) Signup and view all the answers

Which of these is not a standard temperature scale used for measuring temperature?

Pascals (D) Signup and view all the answers

Which of the following gases has a density greater than that of Air?

Oxygen (B) Signup and view all the answers

Which of the following examples is classified as a nephrotoxin?

Cadmium (C) Signup and view all the answers

What is a defining characteristic of potentially explosive chemicals?

They undergo rapid chemical changes under specific conditions. (C) Signup and view all the answers

Which of the following chemicals is an example of a dermatotoxin?

Organic solvents (D) Signup and view all the answers

What is the main purpose of pictograms on chemical labels?

To alert users of potential chemical hazards. (B) Signup and view all the answers

Which of the following statements is true regarding explosive chemicals?

They require specific conditions such as heat or impact to be dangerous. (B) Signup and view all the answers

Which of the following is NOT an example of a potentially explosive chemical?

Copper sulfate (D) Signup and view all the answers

What does the red border around a pictogram signify in the context of chemical labeling?

It emphasizes the urgency of the hazard. (A) Signup and view all the answers

Which of the following represents a common misconception about chloroform?

Chloroform is always safe to handle if used in small quantities. (D) Signup and view all the answers

What is the numerical value of the prefix 'giga'?

1,000,000,000 (C) Signup and view all the answers

Which conversion factor correctly converts kilometers to miles?

1 km = 0.6214 mi (C) Signup and view all the answers

What is the power of 10 equivalent for the prefix 'milli'?

$10^{-3}$ (D) Signup and view all the answers

How many grams are there in 1 pound?

453.6 g (A) Signup and view all the answers

Which of the following is the correct conversion for 1 foot?

12 inches (C) Signup and view all the answers

What is the equivalent of 1 liter in milliliters?

1000 mL (D) Signup and view all the answers

What does the prefix 'centi' represent in numerical value?

0.01 (B) Signup and view all the answers

Which unit is NOT a valid volume conversion?

1 cubic inch = 16 fl oz (C) Signup and view all the answers

How many kilometers are in 1 mile?

1.6093 km (D) Signup and view all the answers

Which of the following is the correct representation for the prefix 'exa'?

1,000,000,000,000,000,000 (A) Signup and view all the answers

What defines a pyrophoric substance?

A substance that ignites instantly upon exposure to oxygen (A) Signup and view all the answers

How is risk defined in the context of workplace safety?

A combination of incident likelihood and the magnitude of injury (C) Signup and view all the answers

What is a Safety Data Sheet (SDS)?

A document produced in accordance with the UN's GHS for chemical labeling (A) Signup and view all the answers

What is a characteristic of a toxic substance?

It can cause harmful effects through various exposure routes (C) Signup and view all the answers

Why are chemicals used widely in various fields?

They help in formulating important substances for various applications (B) Signup and view all the answers

What is the significance of the process known as SDS authoring?

To produce a well-structured Safety Data Sheet (D) Signup and view all the answers

Which of the following is an effect of using chemicals in agriculture?

Increased agricultural productivity (C) Signup and view all the answers

Study Notes

Self-Instructional Manual (SIM) for Self-Directed Learning (SDL)

This document is a draft version
Not for reproduction or distribution outside intended use
Only for officially enrolled students
Expect revisions of the manual

Course Information

Course/Subject: BCHE 111/L – CHEMISTRY FOR ENGINEERS
Course Coordinator: Engr. Jeralyn G. Cabotaje
Email: [email protected]
Student Consultation: Done online, email, face-to-face
Mobile: 2961084 local 133
Phone: 2961084
Effectivity Date: August 2, 2022
Mode of Delivery: Blended (online and face-to-face)
Time Frame: 108 hours (lecture + laboratory)
Student Workload: Expected self-directed learning
Requisites: None
Credit: 4 units (3 lecture, 1 laboratory)
Attendance Requirements: Minimum 95% attendance at scheduled virtual or face-to-face sessions

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Description

Explore the self-instructional manual for BCHE 111/L - Chemistry for Engineers. This essential guide supports self-directed learning and outlines course expectations, workload, and delivery methods. Ideal for officially enrolled students to enhance their understanding of the course structure and requirements.