Why doesn't the mass number of an isotope match the atomic mass given on the periodic table?

2. A. Based on your results, why do you think that HCI was a stronger electrolyte then acetic acid? (Hint - How does the fact that acetic acid is a weak acid, which only partially dissociates in water, while HCl is a strong acid which completely

A population in an ecosystem cannot grow indefinitely. There are limiting factors in each ecosystem that keep a population within a certain size range.

The phase change that is reverse of evaporation is

Calculate the molar mass of the following using the periodic table: 1.) HCl 2.) ZnF2 3.) K2CO3 4.) FePO4 5.) Cu2S

O identify a liquid substance, a student determined its density. using a graduated cylinder, she measured out a 45-ml sample of the substance. she then measured the mass of the sample, finding that it weighed 38.5 g.

What property do most metals share

Express this amount in dozens. (Use decimal form.) 75 pies

A series circuit has two 5.0-ohm resistors and a power source of 9.0 volts. How will the current be affected and what will it be if another resistor (with a resistance of 7.5 ohms) is added to the circuit? A. increase; 0.51 amps B. increase; 0.

Which type of reaction will occur when equal volumes of 0.1 M HCl and 0.1 M NaOH are mixed 1. Neutralization 2. Ionization 3. Electrolysis 4. Hydrolysis

What is molarity of heavy water?