Write formulas for the following compounds: potassium iodine, phosphorus pentachloride, magnesium hydroxide, aluminum sulfate, dichlorine heptoxide, and calcium nitrate trihydrate.

We are required to write the formulas of the compounds given.

The chemical formula for the following compounds is as follows:

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The answer to your question is:

Explanation:

Potassium iodide                           KI

Phosphorus pentachloride           PCl₅

Magnesium hydroxide                  Mg(OH)₂

Aluminum sulfate                          Al₂(SO₄)₃

Dichlorine heptoxide                    Cl₂O₇

Calcium nitrate trihydrate             Ca(NO₃)₂ 3H₂O

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s

conservation of mass

mass before something happens = mass afterwards