WO3+3H2-->W+3H2O ... How many grams of tungsten trioxide must you start with to prepare 5.10g of tungsten? MW=231.8 amu

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

What are the factor responsible for the non usage of fusion to generate energy

The mass of a proton is approximately equal to (1) 1 atomic mass unit (2) 12 atomic mass units (3) the mass of one mole of carbon atoms (4) the mass of 12 moles of carbon atoms

Which formula represents lead (ii) chromate? and why is it this?

Calculate the Ka for 0.220 M solution of H3AsO4, pH = 1.50

Which element has an ion that is smaller than an ion of calcium?

Which factor is responsible for the weak attraction between diatomic molecules of the halogens (group 7A) ? A) Hydrogen bonding B) Ionic bonding C) Dipole interactions D) London dispersion forces

Which is the correct equation for refractive index?

Alcl3) and lithium sulfate (li2so4) (note - this is a double replacement reaction. you need this information to predict the products of the reaction)

Which type of bond is present in hydrogen sulfide (H2S) ? The table of electronegativities is given.