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zavuch27 [327]
3 years ago
13

HELP ILL MARK ASBRAINLEST

Chemistry
2 answers:
Colt1911 [192]3 years ago
5 0

Answer: Option A and B.

Organ system and tissues.

Explanation:

Earthworm is a segmented worm that belong to the phylum annelids. Earthworm has a close circulatory system just as human beings which means their blood circulate through a closed network of vessels which are connective tissues. Earthworm has a structure of 5 hearts and they are called aortic arches which are organ systems. These pump blood into network of vessels and it's flow through the body. From there, the blood move to dorsal blood vessel which send blood to the front of the Earthworm, then to the ventral blood vessel which send blood to the posterior. At the intestines, there are lateral vessels which carry nutrients away from the gut and to the body.

Misha Larkins [42]3 years ago
3 0

Answer:Huehuehue

Explanation: Letter "B"

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SOMEONE HELP ME PLEASE!!! ILL GIVE BRAINLY
nevsk [136]

Answer:

the answer is c

Explanation:

My reasoning is that its most likely

6 0
3 years ago
The Lucas test has _______ results based on the type of alcohol present because the reaction involves a _________, which is ____
Olin [163]

Answer:

1) positive

2) carbocation

3) most stable

4) faster

Explanation:

A common test for the presence of alcohols can be achieved using the Lucas reagent. Lucas reagent is a mixture of concentrated hydrochloric acid and zinc chloride.

The reaction of Lucas reagent reacts with alcohols leading to the formation of an alkyl chloride. Since the reaction proceeds via a carbocation mechanism, tertiary alcohols give an immediate reaction. Once a tertiary alcohol is mixed with Lucas reagent, the solution turns cloudy almost immediately indicating an instant positive reaction.

Secondary alcohols may turn cloudy within five minutes of mixing the solutions. Primary alcohols do not significantly react with Lucas reagent obviously because they do not form stable carbocations.

Therefore we can use the Lucas reagent to distinguish between primary, secondary and tertiary alcohols.

5 0
3 years ago
Calculate the number of ATOMS in 1.0 mole of O2.
Wewaii [24]
There is 6.02*10^23 molecule per mole. And there is 2 atoms per oxygen molecule. So the answer is 1.204*10^24 atoms in 1.0 mole of O2.
7 0
3 years ago
Read 2 more answers
Need help with question
3241004551 [841]
C, because a homogeneous mixture is evenly mixed.

All those others would be heterogeneous (not evenly mixed).
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3 years ago
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A student, wearing chemical safety goggles and a lab apron, is to perform a laboratory test to determine the pH value of two dif
Setler79 [48]
They should probably wear gloves. A pH of 2.0 is a very strong acid, and it can easily irritate their hands. They should also remember to NEVER touch their face, mouth, etc. and to keep all chemicals on the laboratory table.
6 0
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