You start with a 500 g sample of Co-57. about how much time has passed if you end up with a 250 g sample

Based on sulubility rules, which of the followingwill occur when solutions of ZnSO4 (aq) andMgCl2 (aq) are mixed? Write the NIE if aprecipitation is considered likely. A. ZnCl2 wil precipitate; Mg2andSO42_ will be spectatior ions. B.

What gets oxidized in a galvanic cell made with magnesium and zinc electrodes?

4) Calculate the heat needed to melt 40.0 g of ice at 0°C?

When a 4 g peanut is burned, it warms 300 ml of water 45 °c. what was the energy content of the peanut?

Describe the differences among meteoroids meteors and meteorites

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.