How much heat energy is needed to raise the temperature of a 48 g sample of aluminum
from 36.3
◦C to 97.3
◦C? The specific heat of
aluminum is 0.897 J/g · K.
1. 3880.42
2. 2655.3
3. 3439.1
4. 3014.73
5. 2689.92
6. 2626.42
7. 2591.43
8. 2458.86
9. 2937.23
10. 4000.98
Answer in units of J.

- 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

since electrons are negative the answer is neagtaive