General Chemistry 1

Which option best illustrates chemistry’s importance in everyday life?

• It helps us understand gravitational force.

• It explains the existence of day and night.

• It explains the difference between animal and plant cells.

• It gives us ideas on the composition of the materials we use.

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When an environmentalist routinely measures various chemical concentrations in the atmosphere to monitor pollution, which aspect of chemistry’s role in daily life does this demonstrate?

• Industry depends on chemistry.

• The practice of many professions and occupations need good knowledge of chemistry.

• The application of theories in chemistry produces new and better materials.

• Everyday experiences at home and the community are all explained by chemistry.

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Which branch of chemistry is involved in measuring the level of mercury in blood?

• analytical chemistry

• biochemistry

• organic chemistry

• physical chemistry

Which profession requires an understanding and application of concepts such as chemical reactions, kindling temperature, combustion, flammability, and the composition of materials?

• cook

• environmental health inspector

• firefighter

• radiologist

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Which job primarily requires the application of air pressure?

• farmer

• radiologist

• pharmacist

• vulcanizer

Which chemistry concept is extensively applied in the field of pharmacy?

• combustion reactions

• preparation of compounds

• composition of water

• structure of water molecule

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NGSS.MS-PS1-5

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For the measurements 12.1 cm, 12.8 cm, 13.4 cm, and 13.2 cm, what is the mean length—and do these values exhibit precision?

• Mean is 12.875 cm – the data lacks precision.

• Mean is 12.875 cm – the data is precise.

• Mean is 13.175 cm – the data lacks precision.

• Mean is 13.175 cm – the data is precise.

Determine the number of significant figures in the volume 1.90 L.

• 1 significant figure

• 2 significant figures

• 3 significant figures

• 4 significant figures

Which concept explains why the number 65,000 can be interpreted as having either 2 or 5 significant figures?

• Captive zeros

• Final zeros

• Leading zeros

• Trailing zeros

Calculate the sum of 12.319 g, 1.2976 g, and 115.47 g, and express it with the proper significant figures.

• 129.0866 g

• 129.087 g

• 129.09 g

• 129.1 g