What do the elements in each pair have in common? k, kr be, mg ni, tc b, ge al, pb?

Which building material would provide the best surface for viewing a reflection? cement brick glass wood

The chemistry of nitrogen oxides is very versatile. Given the following reactions and their standard enthalpy changes, (1) NO (g) + NO2 (g) → N2O3 (g) ΔH o rxn = - 39.8 kJ (2) NO (g) + NO2 (g) + O2 (g) → N2O5 (g) ΔH o rxn = - 112.

The size of a minerals crystals depends on what?

Which substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes? a) CH4 b) H2S c) CO2 d) NaCl

What is a group of elements with few valence electrons that conducts heat and electricity?

Gamma rays are waves of energy that have no charge. true false

Describe what a polar covalent bond is and name a common compound that has a polar covalent bond holding it together

Part a:we can determine the purity of solid materials by using calorimetry. a gold ring (for pure gold, specific heat = 0.1291 j⋅g-1⋅k-1) with mass of 10.5 g is heated to 78.3 ∘c and immersed in 50 g of 23.

How has desertification impacted the environment in Latin America?

In a titration experiment, hcl and lioh solutions were used. the initial volume of hcl was 1.25ml and lioh was 2.65 ml. the final volume of hcl was 13.60 ml and lioh was 11.20 ml. if the lioh was 0.140 m what was the molarity of hcl?