What type of observation is the following: 5,000 people?

a. quantitative

b. qualitative

c. both

d. neither

What type of crystal is limestone

The formula for cocaine is C17H21N04. What is the percentage of carbon in the compound? (a) 4.62% (b) 6.99% 21.1% (d) 67.3%

Powdered drink mix dissolved in water. if you let all liquid evaporate out of the pitcher would you be able to see the solid particles of the drink mix?

The half life for the radioactive decay of rubidium-87 to strontium-87 is 4.88 * 10 years. Suppose nuclear chemical analysis shows that there is 0.728 mmol of strontium-87 for every 1.000 mmol of rubidium-87 in a certain sample of rock.

What is the difference between ground state and excited state in chemistry?

The spines and thick wavy cuticle on a cactus are both what

What type of chemical process is used to create perfume?

Which of the following is a polyatomic ion? O A. HCI O B. Na O C. PO, O D. 52

What are the cations and anions for V2 (CO3) 3

If you were asked to convert 4.2 x 1022 atoms of aluminum to moles, which of the following should you use for the conversion?