If a solution has a hydronium ion concentration of 1x10^-9 m the solution is

a) acidic and has a pH of 5

b) basic and has a pH of 9

c) basic and has a pH of 5

d) acidic and has a pH of 9

Where are you most likely to find plant roots

Before it was launched, a helium-filled balloon had a pressure of 101 kPa at a temperature of 20°C. At an altitude of 15 000 m, the pressure had decreased to 11.7 kPa and the temperature had dropped to - 56 °C.

Calculate the molar mass of PbCO4

Potassium nitrate has a lattice energy of - 163.8 kcal/mol and a heat of hydration of - 155.5 kcal / mol. How much potassium nitrate has to dissolve in water, at room temperature, to absorb 1.00 x 102 kJ of heat

The name for the compound LiClO2 is: lithium monochloride dioxide lithium chloride lithium chlorite lithium chlorate

Of the total base sequence in human DNA, what percentage codes for proteins? A) Nearly 50 percent B) About 5 percent C) About 90 percent D) 100 percent

When an atom of phosphorus becomes a phosphide ion (P3-), the radius decreases, increases or stays the same?

Determine the percentage composition (by mass) of oxygen in NH4NO3.

Why does aluminum have a higher specific heat than gold?

The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region? A. gamma rays B. visible light C. microwaves D. radio waves E. x-rays