What is a dark mysterious and non-nicotine mineral containing sample of a very common silicate? It's geology actually.

A solution is initially 0.10m in mg2 + (aq) and 0.10m in fe2 + (aq). solid naoh is slowly added. what is the concentration of fe2 + when mg (oh) 2 first precipitates? ksp (mg (oh) 2) = 6.0 x 10-10; ksp (fe (oh) 2) = 7.9 x 10-16

Elements are placed in the same column of the periodic table because they share the same number of valance electrons. a. True b. False

Which has a greater mass, a kilogram of feathers or a kilogram of iron? Which has a greater density? Explain.

Be sure to answer all parts. Metal hydrides react with water to form hydrogen gas and metal hydroxide. For example, SrH2 (s) + 2H2O (l) → Sr (OH) 2 (s) + 2H2 (g) You wish to calculate the mass of hydrogen gas that can be prepared from 5.

the absolute tempeature of a gas is increased four times while maintaining a constant volume. what happens to the pressure of the gas

5. How did Moseley solve the problem of the elements in Mendeleev's table that did not fit the pattern?

Earthquakes can ___ A. Trigger other earthquakes B. Cause tsunamis C. Cause billions of dollars in damages D. All of the above

Which intermolecular force of attraction is the strongest between molecules of hcl?

Classify the substances as atomic elements, molecular elements, molecular compounds, or ionic compounds. drag each item to the appropriate bin.

How can you explain the arrangement of the electromagnetic spectrum?