5. Calculate the [OH] concentration in a 1.6 x 10M Ca(OH)2 solution. 6. Calculate the [H3O*] concentration in a 5.2 x 10*M H2SO4 solution.

A standard curve for absorbance vs. concentration has an equation of y = 2.0x.  If an unknown compound has an absorbance of 0.856, what is its concentration? Units not required. Report your answer to the correct number of significant figures.

Asking for Q 9

Just #2 please

Below are 3 real life situations. Pick two (2) them and explain ALL the science involved in the scenario. This means describe things like what is happening to the gas/liquid/solid molecules or atoms, which principles or laws are at work, why what is happening is happening, and how you know.  At sea level, a pot of water will boil at 100 °C. Suppose you wanted to boil the same amount of water high in the Rocky Mountains. What do you expect the temperature will need to be (generally speaking)? Why?   A can of soda sits in a sunny spot on the window sill for several hours. It is then opened at the same time as a cold can of soda from the refrigerator. What happens and why?   Weather balloons do not float out into space. They reach an altitude of about 15 miles above the surface (3x the height of Mt Everest) and they burst. Why?

A typical sports drink comes in a 20 fluid ounce bottle. 1 fluid ounce is 29.57 mL. Given your observed dye concentration, if you drank one bottle of sports drink per day for a year, how many grams of dye would you consume?

Consider the two spheres shown here, one made of silver and the other of aluminum. The spheres are dropped from a height of 1.7 m. Composition - aluminum Density= 2.70 g/cm³ Volume 196 cm³ Composition - silver Density 10.49 g/cm³ Volume=196 cm³ What is the kinetic energy of the silver sphere at the moment it hits the ground? (Assume that energy is conserved during the fall and that 100%% of the sphere's initial potential energy is converted to kinetic energy the time impact occurs.) Express your answer to two significant figures and include the appropriate units. Ek = Value Units

The length of a single bond joining two carbon atoms together is approximately 0.00000000015 m. Express this number in scientific notation.

An electric current of 481.0 mA transports 530. uC of charge. Calculate the time this took. Be sure your answer has the correct unit symbol and 3 significant digits. 0 x10 X H 8 S

A student calibrated a eudiometer by first recording the mass of the empty eudiometer followed by filling the eudiometer to the 50.00 mL line with deionized water at 22°C and recorded the mass. The mass of water was 49.012 g. In an experiment run at 22°C, a reading from the eudiometer of 46.78 mL corresponds to what true volume?