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2 years ago

Use the diagram to answer Question 3.

Chemistry

2 answers:

Ierofanga [76]2 years ago

8 0

D. The limb bones do not look as developed as

they do in the amphibian.

Ratling [72]2 years ago

7 0

Answer:

it has fins like a fish

Explanation:

because it has a fin bone

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Scientists use bacteria to make medicines, o True o False

sladkih [1.3K]

Answer:

true they do I yes they do

6 0

3 years ago

Rn-222 has a half-life of 3.82 days. If 25.0 g of Radon-22 was originally present, approximately how many grams would be left af

horsena [70]

Answer:

Approximately 0.39 g or 0.4 g if you're rounding up

Explanation:

15/3.82 = 3.92

Let's round that up to 4

That means 15 days is around 4 half lives

4 half lives means 1/16 of the original mass will be left

25/16 = 0.390625

6 0

4 years ago

Calculate no of moles in 42g of carbon ?

kondaur [170]

Answer:

$\huge\boxed{n = 3.5\ moles}$

Explanation:

Given :

Mass in grams = m = 42 g

Molar Mass = M = 12

Required:

No. of moles = n = ?

Formula :

m = m / M

Solution:

n = 42 / 12

n = 3.5 moles

4 0

3 years ago

Read 2 more answers

Predict the major product of the following reaction of 1-methylcyclohexene with dilute HCl in H2O?

Scrat [10]

Answer:

1-chloro-1-methylcyclohexane

Explanation:

The hydrocarbons with one double bond are called alkenes and are named with the suffix "ene". The alkenes, such as 1-methylcyclohexene, react better in an addition reaction. The double bond will be broken, and the substitutes will be placed at them.

In the reaction with HCl, H and Cl will be added to the carbons of the broken bond. The major product is formed when H is put at the carbon less substituted. Thus, the product will be the one given below, 1-chloro-1-methylcyclohexane.

7 0

3 years ago

Draw the alkyl bromide(s) you would use in a malonic ester synthesis of ethyl 3-methylbutanoate.

Gennadij [26K]

The structure of the alkyl bromides used in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate.

Ethyl 2-methyl-4-pentenoate by Malonic ester synthesis.

The alkylation of diethyl malonate or a related ester of malonic acid at the carbon alpha (immediately next) to both carbonyl groups, followed by conversion to a substituted acetic acid, characterizes the chemical reaction known as the malonic ester synthesis.

As a result, it is evident from the structure of ethyl 2-methyl-4-pentenoate that ethyl and methyl bromides are the alkyl bromides employed.

To learn more about Malonic ester synthesis refer here:

brainly.com/question/17237043

#SPJ4

4 0

2 years ago