Which element is placed in the same period as ruthenium but had a higher atomic number than it ?
a. bismuth
b. osmium
c. silver
d. zirconium

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

How does the viscosity of magma change as magma cools?

Which formula equation represents the burning of sulfur to produce sulfur dioxide? s(s) + o2(g) 4502(9) 2h2s(s) + 302(g) —> 2h20(0) + 2502(9) 4fes2+1102 —> 2fe2o3 + 8502 2802(g) + o2(9) v205 , 2503(9)