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3 years ago

15

The plants shown bloom in summer. Which statement explains why the plants bloom in summer? The nights are shorter. The nights ar

e longer. The nights are colder. The nights are warmer.

1 answer:

Bess [88]3 years ago

5 0

Answer:

It’s A

Explanation:

The nights are shorter. I just took the unit test review

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Yakvenalex [24]

31) A renewable resource is qualified as things like, Solar, Wind, Hydro-electric, and thermal.
A non-renewable source can be like coal, trees, Gasoline (oil), and petroleum.

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3 years ago

Is concrete a homogeneous or heterogeneous mixture?

barxatty [35]

Heterogeneous mixture

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3 years ago

If a mole of sodium chloride weighs approximately 58 grams, and you have 29 grams of sodium chloride, how many moles of sodium c

Dennis_Churaev [7]

Molar mass NaCl = 58 g

Mass of solute = 29 g

number of moles: mass of solute / molar mass

n = 29 / 58

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hope this helps!

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3 years ago

15. Which of the following elements will not form a polar covalent bond with oxygen? A. Sodium B. Fluorine Oxygen D. Hydrogen

muminat

Answer:

C. oxygen

Explanation:

oxygen cannot for a polar covalent bond with another oxygen atom

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3 years ago

Two students are given the starting material benzoic acid and are asked to prepare benzaldehyde. The first student starts by ref

Likurg_2 [28]

Answer:

Compound A: Benzoyl chloride

Compound B: Benzaldehyde - (tBuO)₃Al complex

Compound C: Benzaldehyde

Compound D: Benzyl alcohol

Explanation:

The lithium tri-tert-butoxyaluminum hydride that the first student used is a milder reagent than LAH and will stop reacting at the aldehyde.

The LAH that the second student used is much more reactive and will continue to reduce the benzoic acid as far as possible, going all the way to the alcohol.

See the attachment for the reaction steps.

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3 years ago