Calculate the concentration of sodium carbonate if you pipette 25cm³ containing 2.725 anhydrous sodium carbonate

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

How many moles of gas are present if p=11 atm, v=12l, t=185k?