Which statements describe situations where organisms interact and depend on each other for survival?
1 answer:
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Answer:
25.0 g.
Explanation:
- From the solubility curve that is shown in the attached image, the solubility of KCl per 100.0 g of water is about 50.0 g.
- <em>So, a saturated solution of KCl in 50.0 g of water will contain about 25.0 g.</em>
- <em>Thus, the grams of the dry salt that will be recovered is 25.0 g.</em>
Answer:
See below
Step-by-step explanation:
(a) Shape
The formula for water is H-O-H.
The central O atom has four electron pairs around it. They try to get as far from each other as possible, so they point toward the corners of a tetrahedron.
Only two of the pairs have a hydrogen atom attached, so water has a bent shape. The H-O-H bond angle is about 104°.
(b) Chemical magnet
The O atom has a greater attraction than H for the shared electrons in the O-H bonds, so the electrons spend more time near the O.
This gives the O atom a partial negative charge (pink in the diagram) and the H atoms a partial positive charge (blue).
The water molecule acts like a chemical magnet because its negative end attracts the positive ends of other molecules, while its positive ends attract the negative ends of other molecules.
