Cesium-137 has a half-life of 30 years. You find a sample with 3 g of cesium-137. How much cesium-137 existed in the sample 90 years ago?

Which of the following is an acid-base neutralization reaction? NaOH + HCl yields NaCl + H2O 2NaCl + H2SO4 yields Na2 SO4 + 2HCl C6H12O6 + 6O2 yields 6CO2 + 6H2O 2H2 + O2 yields 2H2O

What issue does the designer most likely need to improve in order for the dishwasher to be a good product to sell

How many grams are in 52grams of Ca3 (PO3) 2

In which grouping of the periodic table do the elements have similar properties?

Will the vapors of acetic acid go to the floor or ceiling of a room

What determines the horizontal arrangement of the periodic table?

A 55.3 g sample of lead heated and then quenched in a 175g sample of water. During the quenching reaction the temperature of the water increases from room temperature, 25.0 °C, to 42.6 °C.

What conclusion can you draw from this experiment about the components of the black ink

How does the size of ions affect the conductivity of a solution?

How to write complete ionic and net ionic equations?