A sample of Strontium-90 is found to have decayed to one-fourth of its original amount after 58.2 years. What is the half-life of strontium-90?

How many moles of water are consumed if 0.729 mol H3PO4 are produced?

A 55.0-mg sample of al (oh) 3 is reacted with 0.200m hcl. how many milliters of the acid are needed to neutralize the al (oh) 3?

The octet rule states that all atoms would like to have 8 electrons in their last shell with no exceptions! true or false

Given the following information, identify which of these are the same element. Be sure to explain your answer. Element 1: 6 protons, 6 neutrons, 6 electrons Element 2: 7 protons, 6 neutrons, 7 electrons Element 3: 6 protons, 7 neutrons, 7 electrons

In the reaction MgCl2 + 2KOH Mg (OH) 2 + 2KCl, if 3 moles MgCl2 are added to 4 moles KOH, what determines how much Mg (OH) 2 is made? A. The amount of MgCl2 + KOH B. The amount of KCl C. The amount of MgCl2 D. The amount of KOH

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.

Under what condition is decompostion the fastest? Under what condition is it the slowest?