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2 years ago

Transcribe and translate the following DNA sequence:

Chemistry

1 answer:

MA_775_DIABLO [31]2 years ago

7 0

Answer:

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Salt is dissolved in a flask of tap water. Distilling the mixture causes the salt to separate from the water. Which type of ener

Juliette [100K]

D.

The water must be heated and removed in distillation, so thermal energy is required.

4 0

3 years ago

Read 2 more answers

Which forces can be represented in a free body diagram

Lilit [14]

I think external forces acting on an object may include friction, gravity, normal force, drag, tension, or a human force due to pushing or pulling can be represented by a free body diagram.

6 0

3 years ago

A sample of raw mining ore contains a hydrated salt called copper sulfate tetrahydrate, CuSO4.4H2O, along with other impurities.

julsineya [31]

Answer:

88.5 % of the raw ore is CuSO4*4H2O

Explanation:

Step 1: Data given

Mass of the ore = 10.854 grams

Mass of water = 2.994 grams

Step 2: Calculate moles H2O

Moles H2O = mass H2O / molar mass H2O

Moles H2O = 2.994 grams / 18.02 g/mol

Moles H2O = 0.166 moles

Step 3: Calculate moles CuSO4*4H2O

For 1 mol CuSO4*4H2O we have 4 moles H2O

For 0.166 moles H2O we have 0.166/4 = 0.0415 moles CuSO4*4H2O

Step 4: Calculate mass CuSO4*4H2O

Mass CuSO4*4H2O = moles * molar mass

Mass CusO4*4H2O = 0.0415 moles * 231.67 g/mol

Mass CuSO4*4H2O = 9.61 grams

Step 5: Calculate mass % of CuSO4*4H2O

Mass % = (9.61 grams / 10.854 grams )*100 %

Mass % = 88.5 %

88.5 % of the raw ore is CuSO4*4H2O

4 0

4 years ago

What evidence of a chemical reaction might you see in rusting of an iron nail

kirza4 [7]

The nail would not be it's original color. The rust would show.

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3 years ago

Name two functional groups that contain ionic charges?

Alika [10]

The answer is:

carboxylate

and protonated amines

The explanation:

when

The Carboxylic acids are polar . and the functional group carboxyl is formed from the hydroxyl and carbonyl group.

and about protonated amines:

-alkyl groups improve the basicity, aryl groups diminish it.

-Primary amides have an aromatic group or alkyl attached to an amino-carbonyl function.

- Primary amines are basic functions which could be protonated to the ammonium ion

6 0

3 years ago