In a chromatography experiment, chlorophyll pigments are separated using paper. What is the stationary phase in this experiment?

A) water

B) chlorophyll pigments

C) paper

D) gas

In his pamphlet Common Sense, Thomas Paine urged American colonists to (1) establish their own nation (2) pay their colonial taxes (3) obey the laws of Parliament (4) form an alliance with France

After substantial heating, 6.25 g of iron produced 18.00 g of a compound with chlorine. The empirical formula is: a. FeCl3 b. Fe3Cl c. Fe2Cl3 d. FeCl2 e. Fe2Cl

What does it mean to say that the trials of an experiment are independent? a. One outcome is more likely to happen than the other outcomes. b. The outcome of one trial does not affect the probability of success on any other trial. c.

Compare the arrangements of individual particles in solids, liquids, and gases?

Given the equation zn (s) + 2 hcl (aq) → zncl2 (aq) + h2 (g), what mass of hydrogen gas is produced when 2.8 g zn is reacted with excess aqueous hydrocholric acid?

How many liters of air are in a room that measures 10.0 ft * 11.0 ft and has an 8.00 ft ceiling? 1 in. = 2.54 cm (exactly); 1 L = 103 cm3

Which of these represents a chemical change? A) two compounds combining to form a mixture B) a mixture being separated into two elements C) a compound being separated into two elements D) an element changing state from solid to liquid

What properties would have caused early researchers to name hydrogen "inflammable air"

Enter the symbol of a sodium ion, Na+, followed by the formula of a sulfate ion, SO42-

When making a molar liquid solution from a dry chemical stock, you must know the molecular weight of the compound. (A) True (B) False