Which of these is NOT a physical change?

A.

Candle burning.

B.

Evaporation of water.

C.

Magnetisation of iron.

Which element in each pair has a greater first ionization energy? a) lithium, boron b) magnesium, strontium c) cesium, aluminum

Why do you think matter changes state when outside forces act upon it?

A student dissolves some solid NaNO3 in a beaker of water. Which are the solute and the solvent? Choose all answers that are correct. A. solute: water B. solvent: water C. solvent: NaNO3 D. solute: NaNO3

What is climate? what effects climate?

11. what is the volume of 80.0 g of ether if the density of ether is 0.70 g/ml? a) 5.6 x 10^1 ml b) 1.1 x 10^2 ml c) 8.8 x 10^-3 ml d) 8.0 x 10^1 ml

When magma intrudes parallel to another rock layer, the formation is called a (n) A. sill. B. dike. C. extrusion. D. unconformity.

What is the net amount of energy released when 1 mole of H2O is produced

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.