The mass of bromine is 79.904, and since there are two of them in the Calcium Bromide molecule, we'll multiply it by 2 to get 159.808. Dividing that by the full mass of the molecule then multiply it by 100 will give you the answer.

8 0

3 years ago

Put the levels of organization of an ecosystem in order from smallest (1) to largest (4).

Nina [5.8K]

From smallest to largest the order would be..

organism, population, community, and ecosystem.

Hope this helped! I would appreciate a brainliest!

8 0

4 years ago

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You are working in a laboratory, and you are given the task of converting cyclopentene into 1, 5-pentanediol. Your first thought

Helen [10]

Answer:

Reagent A = $H_3O^+$

Reagent B= $Na_2Cr_2O_7~H_2SO_4~H_2O$

Intermediate C= δ-Valerolactone

Explanation:

In the reaction from the alkene to the alcohol, we can use the alkene hydration in which the hydronium ion is added to the double bond followed by the attack of water to produce the alcohol.

Then in the conversion from alcohol to ketone can be produced if an oxidant reactive is used. In this case the Jones reagent ( $Na_2Cr_2O_7~H_2SO_4~H_2O$ ).

The intermediate is a structure produced by a peroxyacid. This reaction would introduce an ester group in the cycle generating the δ-Valerolactone (Figure 1).

7 0

3 years ago