18 Which unit is used to express an amount of thermal energy? (1) gram (3) joule

(2) mole (4) pascal

Which electrolyte is stronger, NaOH or Ca (OH) 2? Why?

The equation for the complete combustion of methane is ch4 (g) + 2o2 (g) → co2 (g) + 2h2o (l) to calculate the number of grams of co2 produced by the reaction of 29.5 g of ch4 with o2, the first conversion factor to use is

A student increases the temperature of a 200 cm3 balloon from 60⁰C to 180⁰C. What should the new volume of the balloon be? Use the formula: V2 = (V1 T2) / T1 Question 3 options: 100 cm3 236 cm3 272 cm3 600 cm3

The mass of a substance is the mass per mole of its entities, where the term entities can describe

Explain why the solutions of SbCl3 (aq) in our lab also contain HCl. Why would adding a few drops of this solution to 300 mL of water result in a foggy or cloudy appearance?

A potassium bromide solution is 7.55% potassium bromide by mass and its density is 1.03 g/ml. part a what mass of potassium bromide is contained in 35.8 ml of the solution?

If you have 7 boxes to be moved, the same amount of work is done whether 5 men do the work or 1 person does it. TrueFalse

Ammonia is a weak base. if the initial concentration of ammonia is 0.150 m and the equilibrium concentration of hydroxide is 0.0016m, calculate kb for ammonia.

Determine which change of state is being described in this passage. As the temperature decreases, the atoms lose energy. The atoms begin to move slower. They are held together by attractive forces, but are still able to slide past each other.

When the amount of energy required to break bonds in the reactants is less than the amount of energy released in forming bonds in the products, the process has a negative change in enthalpy (-ΔH). True False