Caffeine contains hydrogen, carbon, nitrogen, and oxygen atoms in a fixed ratio. is it a mixture or compund

3) Of the choices below, which of the following contains covalent bonds? A. PCl5 B. RbCl C. PbCl2 D. MoCl6

Combining a base and an acid forms A. DNA and gas. B. sodium hydroxide. C. salt and water. D. ions.

Using the periodic table, choose the more reactive metal. Ag or Te

What is an atom that accepts an electron called? a. a cation b. a proion c. an anion d. an isomer

Which statements describe how Becquerel, the Curies, and other scientists contributed to the cumulative understanding of radioactivity? Check all that apply. Becquerel showed that radioactivity is a form of phosphorescence.

Consider the balanced equation K, Croa (aq) + Pb (NO3) 2 (aq) → PbCrO4 (s) + 2KNO3 (aq) If 25.0 ml of a 1.00M K, Cro, solution is mixed with 10.0 ml of a 0.500M Pb (NO3) 2 solution. a. How many moles of potassium chromate are present? b.

Name 3 organisms that would be classified as eukaryotic, multicellular, and heterotrophic.

A bond formed by electrical attraction between two oppositely charged ions is called

Which indicator is blue in a solution that has a pH of 5.6? (1) bromcresol green (3) methyl orange (2) bromthymol blue (4) thymol blue

A hot meal plate at 150 has been placed in air at room temperature. Which event would most likely take place over the next few minutes