What do you notice about the reactivity of an element and the number of valence electrons it have?

A 500 g block of metal absorbs 5016 J of heat when its temperature changes from 20.0 ⁰C to 30.0 ⁰C. Calculate the specific heat of the metal.

What is the mass of 0.500 mole of Ba? (Watch sf's) 68.7 g 137.3 g 68.65 g 69 g

Which does not contain a lens? A. A camera B. An eye C. Binoculars D. A mirror

How did Napoleon make peace with the Roman Catholic Church

Sound waves require a medium to travel through, such as a solid, liquid or gas because A) waves cannot move through a vacuum. B) sound only works within certain pressures. C) waves only work within certain temperatures.

O3 (g) + NO (g) O2 (g) + NO2 (g) Write the equalibrium expression

You are given 10.00 mL of a solution of an unknown acid. The pH of this solution is exactly 2.36. You determine that the concentration of the unknown acid was 0.3535 M. You also determined that the acid was monoprotic (HA).

What mass of copper is consumed in the reaction with hydrochloric acid if 10.0 g of gas is collected?

How does the movement of molecules inside a solid block of iron change as the iron is heated? The molecules move faster. The molecules move slower. The molecules stop moving completely. The molecules move in the same way at all temperatures.

Read the following passage: The movement of tectonic plates buries a rock deep inside Earth. Intense heat and pressure change the mineral composition of the rock and transform it into Rock A.