Why are the atomic masses of elements usually decimal numbers? Provide an answer using 3 - 4 sentences in your own words.

Gas Particles move from areas of low pressure to high pressure. True or false

A student wants to increase the maximum amount of sugar that can dissolve in water. She crushes the sugar and then stirs it into the water. Does this work?

The compound NacI is an example of a/an

When a magnesium ribbon is heated in air the product former is heavier. on the other hand when potassium manganate (VII) is heated in air the product formed is lighter. Explian the difference iin observation

the reaction rate constant for a particular second order reaction is 0.47 L/mol sec. If the initial concentration of reactant is. 25 mol/L, how many seconds will it take for the concentration to decrease to. 13 mol/L

What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 31 km/h and the coefficient of static friction between the tires and the road is 0.29?

At a certain temperature, 0.4011 mol of N 2 and 1.501 mol of H 2 are placed in a 3.00 L container. N 2 (g) + 3 H 2 (g) - ⇀ ↽ - 2 NH 3 (g) At equilibrium, 0.1801 mol of N 2 is present. Calculate the equilibrium constant, K c. K c =

How many moles of N are in 0.203 g of N2O?

Given the unbalanced equation: al + cuso4 - - > al2 (so4) 3 + cu. when properly balanced, the sum of the balancing coefficients is select one: a. 7 b. 6 c. 9 d. 8

A particle that has a negative charge is called