Find the empirical formula of a compound that contains 42g of nitrogen and 9g of hydrogen.

What type of elements make up most of the periodic table? Question 1 options: Nonmetals Metals Metalloids

How do the cells of a multicellular organism differ from those of a unicellular organism

Which of the following substances would be the softest? CuO SiC C25H52 Zn

Would you vote to change the coin content or to keep them the same? Explain.

Which color would have the shortest wavelength?! A) red B) yellow C) green D) blue

What effect can new observations have on a scientific theory

The total number of valence electrons in the phosphate ion is

The reaction below has an equilibrium constant kp=2.2*106 at 298 k. 2cof2 (g) ⇌co2 (g) + cf4 (g) calculate kp for the reaction below. cof2 (g) ⇌12co2 (g) + 12cf4 (g)

The electrical conductivities of the following 0.100 M solutions were measured in an apparatus that contained a light bulb as the indicator of conductivity. Rank the solutions in order of decreasing intensity (brightest to dimmest) of the light bulb.

What is the name of a list of elements arranged according to the ease with which they undergo certain chemical reactions?