Which of the Following Is an Example of Chemical Change

question 68

Multiple Choice

Which of the following is an example of chemical change?

• A)Copper building materials develop a green patina over time.
• B)Water vapor condenses on the window.
• C)Ethanol evaporates.
• D)A mixture of hydrogen and oxygen gas explodes on ignition.
• E)A helium balloon goes up in the air.

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Definitions:

FICA

Federal Insurance Contributions Act; a U.S. law that requires a payroll tax on both employees and employers to fund Social Security and Medicare.

Unemployment Taxes

Taxes imposed on employers by the government to fund unemployment insurance programs.

Taxable Wage Base

The maximum amount of an employee's earnings that are subject to certain taxes, such as Social Security tax, within a given tax year.

Employer's Portion

The part of employment taxes and benefits that the employer is responsible for paying, separate from employee withholdings.