This is how osmium appears in the periodic table. Rounded to the nearest whole number, how many neutrons, on average, are in an atom of osmium?

76

114

190

266

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?