What is the pattern shown by the numbers 1,3,5,7,9,1,3,5,7,9?
1 answer:
Answer:
the answer is D. a repeat of odd numbers less than ten
Explanation:
its all the odd numbers less than ten in order
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Answer:
molecular compound
Explanation:
it has two or more nonmetal elements and are covalently bonded
Physical......................................................
Answer:
C. Lithium
Explanation:
This image describes the trend in reactivity. Group 1 metals are always the most reactive so yeah :)
Answer:
2x+3y=-6
4x+3y=12
3x-y=5
5x+3y=1
Explanation:
standard form: ax + by = C
Answer:
O₂ (g).
Explanation:
- All elements that found in nature has heat of formation (Hf) equal 0 J/mol.
- So, the substance that has heat of formation (Hf) equal 0 J/mol is O₂ (g).
- H₂O is formed from the reaction of hydrogen and oxygen and has Hf, Also, the solidification of H₂O (s) from H₂O (l) has (Hf).
- Although, Ne (g) is found in nature and has no Hf, the liquification to form Ne (l) has heat of formation (Hf).
- CO₂ (g) is formed from the reaction between carbon and oxygen and so has heat of formation (Hf).
