How is a pure substance different from a mixture?

A

Pure substances cannot be separated by physical means

B

Mixtures cannot be separated

C

A pure substance is heterogeneous

D

A mixture is made of one substance

What happened to the atoms in the heated metal ball so that it didn't fit through the ring?

What is the capillary action of water?

If both salicylic acid and acetylsalicylic acid are analgesics, why is acetylsalicylic acid the preferred pain medication

To understand reaction order and rate constants. For the general equation aA+bB→cC+dD, the rate law is expressed as follows: rate=

Gas particles are infinitely small

True or false: for genetic engineering the specific traits of a given organism are located on the DNA sequence of the chromosomes are genes

A container with a volume of 3.46 liters contains a gas at a pressure of 1.30 atmospheres and a temperature of 274.27 Kelvins. How many moles of gas are in the container?

Benzene, C6H8, has an enthalpy of fusion = 10.19 kJ/mol. Calculate the amount of energy which is needed to change 88.0 g of solid benzene at 5.53°C into liquid benzene, also at 5.53°C?

What is the H3O + ion concentration of a solution that has an OH - ion concentration of 1.0 * 10^-3M? A) 1.0 * 10^-3M B) 1.0 * 10^-7M C) 1.0 * 10^-11M D) 1.0 * 10^-14M

Given the following chemical reaction: 2 O2 + CH4 CO2 + 2 H2O In the reaction of 6 moles of CH4 with excess oxygen, how many moles of water could be produced? 6 C 12.01 Carbon 1 H 1.01 Hydrogen 8 O 16.00 Oxygen A. 4 B. 6 C. 8 D. 12