Write a molecular equation for the gas-evolution reaction that occurs when you mix aqueous hydrobromic acid and aqueous potassium sulfide.

What most determines the entropy of a solid? A. The mobility of electrons in the solid B. The crystalline structure of the solid C. The specific heat capacity of the solid D. The enthalpy of formation of the solid

Calculate the theoretical yield in moles of magnesium chloride when 37 grams of Mg (s) react with 38 grams of HCl (aq). Write the answer using 2 decimal places and do not use scientific notation.

Calculate the mass of silver chloride in grams required to make 5.8 g of silver plating.

Determine the number of significant figures in the measurement 0.0030020 s.

What are the indications/signs that a chemical change has occurred?

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.