1. Basic Chemistry: Introduction to Chemistry

A trait of matter that can be observed or measured without changing the chemical composition of matter.

• physical property

• chemical reactivity

• chemical property

• toxicity

• oxidation state

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-1

The state of matter in which a substance does not have a definite shape or volume.

• liquid

• solid

• compound

• gas

• element

A substance made of atoms of two or more elements that have combined chemically.

• homogenous mixture

• matter

• atoms

• element

• compound

Tags

NGSS.MS-PS1-1

Which of the following is an example of intensive property?

• melting point

• conductivity

• volume

• density

• colour

Which of the following is an example of extensive property?

• mass

• density

• temperature

• volume

• boiling point

Which of the following is an example of physical property?

• colour

• boiling point

• density

• mass

• oxidation state

Which of the following is an example of chemical property?

• melting point

• enzyme catalysis

• boiling point

• heat stability

• heat of combustion

Tags

NGSS.HS-PS1-1

1 μm (mikro-meter) = .... m

• 1 x 10^-12

• 1 x 10⁶

• 1 x 10^-6

• 1 x 10^-9

• 1 x 10⁹

A computer takes 0.00087 seconds to complete a calculation. Which of the following conversions is correct?

• 870 microseconds

• 87 nanoseconds

• 87 milliseconds

• 8.7 centiseconds

• 8.7 microseconds

A 330mL can of soft drink contains 586 kJ of energy mostly from the 38 grams of sugar. Determine the number of kcal energy if there are 4.184 J in one calorie of energy.

• 2,45 kcal

• 159 kcal

• 8,7 kcal

• 2451 kcal

• 140 kcal

Tags

NGSS.HS-PS3-1