Hypothesis: if the temperature of the liquid is increased, then more sugar will dissolve, because warm solutions hold more solute than cold solutions. to test the hypothesis above, you changed the (a- sugar concentration, b- pressure, c- solubility, d- temperature) of the solvent and measured the (a- sugar concentration, b- pressure, c- solubility, d- temperature) of a solid.

D); A)

Explanation:

You think that more sugar will dissolve if you warm the water, so you

D) change the temperature and

A) measure the sugar concentration at the new temperature.

- 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