Explain the difference between the biotic and abiotic factors in an ecosystem

If a chemist wishes to dilute a 1.000 x 103 mg/l stock solution to prepare 5.000 x 102 ml of a working standard that has a concentration of 6.250 mg/l, what volume of the 1.000 x 103 mg/l standard solution is needed?

Is "the heat of a substance is the measure of the average kinetic energy of the molecules of a system" true or flase

How many atoms of iodine are represented by the formula below? 3Na2H3IO6 A. 1 B. 3 C. 6 D. 18

How many moles is in 175.5g of NaCl?

How would a person on the ground perceive the movement of the ground as each type of seismic waves moved past them

The rate constant of a reaction is 4.7*10-3 s-1 at 25°C, and the activation energy is 33.6 kJ/mol. What is k at 75°C?

What are the pros of using steel?

Cation a has a + 3 charge and is small. cation b has a + 1 charge and is large. which is more likely to occupy negatively charged sites on a clay mineral given equal concentrations in solution? cation a cation b they are the same

Show your work, including units, for the following series of calculations: a. How many moles of Al are in 1.25 g of Al? b.

An aqueous solution at 25 °C has a pOH of 12.42. Calculate the pH. Round your answer to 2 decimal places