Which of these is an appropriate instrument to measure mass?

balance

scale

ruler

graduated cylinder

Select the name of the period 4 transition element that forms a 3 + diamagnetic ion.

Which is a property of acids in aqueous solutions? They feel soapy. They taste bitter. They increase the concentration of H + ions. They decrease the concentration of H + ions.

What is the ratio of lactic acid (Ka = 1.37x10-4) to lactate in a solution with pH = 4.49?

In a mixture of argon and hydrogen occupying a volume of

If 35.2 g of hydrochloric acid react with excess of magnesium, how many grams of hydrogen are produced? Mg + 2HCl - -> MgCl2 + H2

There are five elements named for famous scientists on the periodic table

What character acids is that they react with metals to

The energy of a particular color of green light is 3.81*10-22 kJ/photon. The wavelength of this light is nanometers

How many molecules are in. 25 mole of O2

A flexible container is filled with 960.0 liters of air at 38 degrees Celsius. If pressure in the container does not change, at what temperature will the container have at a volume of 350.0 liters?