PLz HELP ASAP! Mass of stoppered test tube plus metal 95 g Mass of test tube and stopper 31.3g

Mass of calorimeter 2.5 g

Mass of calorimeter and water 46.1 g

Mass of water (subtraction) _ g

Mass of metal (subtraction) _ g

Initial temperature of water in calorimeter 24.0°C

Initial temperature of metal (assume 100°C

unless directed to do otherwise) 98.4°C

Equilibrium temperature of metal and water

in calorimeter 29.0°C

Δ _ °C

Δ _ °C
_ J

Specific heat of the metal _ J/g°C

Approximate molar mass of metal _ g/mol

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

c. is the answer

by love gaming