Two defects of mendelevs peroidic table

How would you use density to identify an unknown substance?

Given a balanced chemical equation between H2SO4 (aq) and KOH (aq) H2SO4 (aq) + 2 KOH (aq) → K2SO4 (aq) + 2 H2O (l) What volume (in mL) of 0.43 M H2SO4 (aq) solution is necessary to completely react with 120 mL of 0.

How is the solar environment friendly

What is the electron configuration of cobalt?

how many grams of solid lithium must be added to liquid after in order to obtain 15.0 L of hydrogen gas at STP?

For the following reaction in aqueous solution, identify all those species that will be spectator ions. Select all that apply. Na, SO4+Hg (NO3) 2HSO4+2NaNO3 Choose one or more: A. Hg2S04 B. Na2S04 C. Nat D. NO3 E. SO42- F. Hg2 (NO3) 2 G. NaNO3 H.

One mole of which hydrocarbon requires 8 mol o2 to achieve complete combustion to give carbon dioxide and water?

How many bromine atoms are present in 39.9 g of CH2Br2

Chemists use activity series to determine whether which type of reaction will occur?

1. Does the temperature rise or drop when you mix vinegar and baking soda. 2. Does the temperature rise or fall when you mix baking soda and water.