3. Which element is most important for growing crops?

a. carbon dioxide

BA

b. hydrogen

C. calcium

d. nitrogen

4. Who discovered how to manipulate equilibrium systems?

Fill in the coefficients that will balance the following reaction: a0SrCl2 + a1Li3PO4 → a2Sr3 (PO4) 2 + a3LiCl

In the balanced chemical reaction shown below, what is the molar ratio of Fe to Al? Fe2O3 (s) + 2Al (s) - -> 2Fe (5) + Al2O3 (5)

What are metalloids used for

Give the number of atoms of each type of sodium carbonate

What type of plate boundary is between the African and south American plate

100 g of water and 100g of metal sample are heated from 25 to 75. which substance requires more thermal energy to reach 75c

A process or reaction which takes in heat from the surroundings is said to be

What is the volume of 0.05 mol of neon gas at STP?

Which is NOT a property of gold? A. rare B. tarnishes C. malleable D. corrosion resistant

The element rubidium has two naturally occurring isotopes. The atomic mass of 85Rb (72.17 percent abundant) is 84.911794 amu. Determine the atomic mass of 87Rb (27.83 percent abundant). The average atomic mass of Rb is 85.4678 amu.