What determines an elements chemical properties?

What is the normal pH of most freshwater lakes, streams, and ponds? Question 3 options: A) 1 to 3 B) 4 to 5 C) 6 to 8 D) 9 to 11

Identify the following as a suspension or a colloid. marshmallow suspension colloid

0.00001011 kilograms is a larger mass than 0.001011 grams. True or False

Given only the following data, what can be said about the following reaction? 3H2 (g) + N2 (g) - --> 2NH3 (g) ΔH=-92kJ A.) The enthalpy of products is greater than the enthalpy of reactants B.

How are chemical bonds important in metabolism?

Oxygen forms a number of compounds with sulfur, many of which are quite reactive. One such compound is 57.20 % by mass S. Calculate the number of grams of oxygen present in a sample of this compound that contains 50.00 grams of S.

What is meant by "pressure of the atmosphere?" What causes this pressure?

A substance is analyzed and found to contain 85.7% carbon and 14.3% hydrogen by weight. A gaseous sample of the substance is found to have a density of 1.87 g/L, and 1 mol of it occupies a volume of 22.4 L.

Which property of a mineral sample does not influence how quickly it settles in water? 1) density 2) hardness 3) shape 4) size

Dinitrogen difluoride gas is collected at in an evacuated flask with a measured volume of. When all the gas has been collected, the pressure in the flask is measured to be.