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?

FeCO3 → FeO + CO2 is what kind of reaction? Double replacement Decomposition Synthesis Single replacement

Effective scientific model

What are the two forces that battle within a star?

Why do liquids evaporate at different rates?

What orbital is represented by the transition metals in period four

A. List three things that your body strives to keep constant. (example metabolism) B. Describe one way in which each of the items you listed in Part A could be at least temporarily disrupted from equilibrium.

Part I Complete and balance the following equation: NO-2 (aq) + Al (s) →NH+4 (aq) + AlO-2 (aq) (basic solution)

A 425.00-gram sample of a compound decomposes into 196.01 grams of carbon, 41.14 grams of hydrogen, 130.56 grams of oxygen, and 57.29 grams of silicon. Experiments have shown the compound has a molecular weight of 208.329.

What characters do all minerals share

Which type of photons in the electromagnetic spectrum contain the least amount of energy?