A solution is prepared by dissolving 1.86g of kcl and 8.29g of k2co3 in enough water to make uo the final volume of 500 cm3. What is the concentration of the potassium ion in the solution?

Which group of elements are the most important for living organisms?/ a. carbon, lead, and tin b. carbon, nitrogen, and oxygen c. boron, aluminum, and nitrogen d. arsenic, antimony, and oxygen

Find the molecular formula for a compound with an empirical formula of NO2 and a molar mass of 92 grams

8.84 g of a compound is analyzed and found to contain 3.53 g of C, 0.295 g of H, 4.08 g of N, and 0.935 g of O. Which of the following could be the molecular formula for this compound? C5H10N3O3 1. C10H10N10O2 2. C2H4N6O 3. C8H8N8O4 4. C4H8N6O2

The particles of a suspension are dissolved into the solvent true or false

Hardness, texture, flammability, and color are all examples of properties of

If I have a 200 L container filled with nitrogen at a pressure of 1.0 atm, how many moles of nitrogen are present at 25 degrees C?

In the periodic table, a set of properties repeats from

Consider the model of the nitrogen atom. Which electron configuration matches this model? 1s22s22p2 1s22s22p3 1s22s22p4 1s22s22p5

In this experiment, you need to examine the idea of thermal energy transfer. Using a controlled experiment, .

What is the pressure of 2.3 moles of carbon dioxide gas stored in a 2 liter container at a temperature of 423 K? Given: a = 3.59 liters2 ∙ atmospheres/mole2, b = 0.0427 liters/mole, and R = 0.08205 liters∙atmospheres/K∙mole 37.22 atm 41.96 atm 79.