Adam wants to work in the field of forensic science and follow the rules for handling evidence. Which organization can he join t
2 answers:
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Answer:
Explanation:
1. First balance the equation for the synthesis of cryolite:
2. Find the limiting reagent between the and
- First calculate the number of moles of each compound using its molar mass and the mass that reacted completely:
- Divide the number of moles obtained between the stoichiometric coefficient of each compound in the chemical reaction:
The is the limiting reagent because it has the smallest number.
3. Find the mass of cryolite produced:
Answer:
The answer is A. Polar covalent; negatively
Explanation:
Hydrogen bonds form between molecules containing polar covalent bond the hydrogen bond is been a hydrogen atom of one molecule and a partially negative charged atom of another.
Example (water):- It contain a slight positive charge on one side and a slight negative charge on the other.