A Chemist Measures the Masses of Two Substances Separately, Then

question 210

Multiple Choice

A chemist measures the masses of two substances separately, then combines them in a reaction flask and heats the mixture.After several minutes, the chemist cools the flask and measures the mass of the contents.The final mass of the contents is less than the sum of the masses of the two substances placed in the flask before heating.Which statement provides a possible explanation for this observation?

• A) Physical changes in the two starting substances resulted in products with less combined mass than the starting substances.
• B) Heating caused the substances to melt, which resulted in a change in overall volume and mass.
• C) The two starting substances absorbed energy from the heat, which destroyed some of the atoms making up the substances.
• D) Only one product was formed from the combination of two reactants, resulting in less overall mass at the end.
• E) The two starting substances underwent chemical change to produce two products, one of which was a gas.

Grasp the impact of diversity programs on leadership compositions within organizations.

Appreciate the complexity and difficulty in changing organization-wide norms including power, habit, and culture.

Understand different methods to overcome resistance to change including interpersonal, team, and organizational approaches.

Realize the competitive advantage of adaptive and flexible organizations over rigid ones.

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Definitions:

Malignant Growth

The formation of cancerous tumors capable of invading and destroying surrounding tissues.

Nonmalignant Growth

A tumor or mass that does not contain cancer cells and does not invade neighboring tissues or spread to other parts of the body.

Prostate Cancer

A form of cancer that develops in the prostate gland in men, characterized by the abnormal growth of cells which can spread to other parts of the body.

Death Rate

The ratio of deaths to the population of a particular area during a certain time period, usually expressed per 1000 individuals per year.