When a 5.00 g 5.00 g sample of KCN KCN is dissolved in water in a calorimeter that has a total heat capacity of 1.95 kJ ⋅ K − 1 , 1.95 kJ⋅K−1, the temperature decreases by 0.460 K . 0.460 K. Calculate the molar heat of solution of KCN .

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?