How many elements compose the majority of rock-forming minerals?

Robert has 4 grams of a substance and Jill has 10 grams of the same substance. Which of the following statements is true? a. Jill's sample will boil at a higher temperature than Robert's sample. b.

A population expert makes a graph to show the future rates of population growth in various countries. Which is necessary a source of error for him?

The chemical formula of glucose is C6H12O6 so it is classified as a [n] A. solution B. mixture C. element D. pure substance

Mass in mg salt sugar chalk sand water

Which of the following cycles does not involve living organisms? a. carbon cycle b. oxygen cycle c. rock cycle d. nitrogen cycle

If you took an empty balloon, weight it on a scale then filled the balloon up with air and weighed it again would you expect the weight of the balloon to change?

Which of the following statments is true for gas particles? they move freely and combine with each other. they dont move at all they move slowly and in a structured pattern they are constantly in motion and changing position.

The A-36 steel pipe has a 6061-T6 aluminum core. It is subjected to a tensile force of 200 kN. Determine the average normal stress in the aluminum and the steel due to this loading.

How many atoms are in 3.3 moles of copper atoms? A. 1.9 x 10 atoms B. 2.0 x 10^23 atoms C. 2.0 x 10^24 atoms D. 2.0 x 10^-23 atoms

What is the Bronsted-Lowry definition of a base?