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4 years ago

Describe how to do a flame test on a sample of a salt

Chemistry

1 answer:

Katen [24]4 years ago

4 0

Answer:Hope this helps!

Explanation:

You can use a flame test to help identify the composition of a sample. The test is used to identify metal ions (and certain other ions) based on the characteristic emission spectrum of the elements. The test is performed by dipping a wire or wooden splint into a sample solution or coating it with the powdered metal salt. The color of a gas flame is observed as the sample is heated. If a wooden splint is used, it's necessary to wave the sample through the flame to avoid setting the wood on fire. The color of the flame is compared against the flame colors known to be associated with the metals.

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I don't know how to transcribe the following DNA sequecne too rna

Llana [10]

Answer:

There is only one change when transcribing from a DNA sequence to a RNA sequence.

Explanation:

The change when transcribing is that instead of thymine (T) in a DNA sequence, you have Uracil (U) in a RNA sequence. The rest will stay the same. So, DNA has ATCG, whereas RNA has UACG. There should be NO thymine (T) in your RNA sequence–– it should only include the four of the following: UACG.

[FORMAT]: DNA is to RNA

A is to U (IMPORTANT, NO "T") –– Think as Apples Under the Tree

T is to A –– Think as Trees have Apples

C is to G –– Think as Car in the Garage

G is to C –– Think as Inside the Garage are Cars

3 0

3 years ago

1) 0.143 g Mg into atoms 2) 0.101 kg Ti into atoms

Neporo4naja [7]

Answer:

The answer to your question is below

Explanation:

1) 0.143g of Mg into atoms

- Look for the atomic number of Magnesium in the Periodic table

Atomic number = 24.31 g

-Use the Avogadro's number to find the number of atoms

24.31g ------------------- 6.023 x 10²³ atoms

0.143 g ----------------- x

x = (0.143 x 6.023 x 10²³) / 24.31

x = 8.613 x 10²² / 24.31

x = 3.54 x 10²¹ atoms

2) 0.101 kg of Ti into atoms

-Look for the atomic number of Titanium in the Periodic table

Atomic number = 47.87 g

-Use the Avogadro's number to find the number of atoms

47.87 g --------------------- 6.023 x 10²³

101 g ---------------------- x

x = (101 x 6.023 x 10²³) / 47.87

x = 6.08x 10²⁵ / 47.87

x = 1.27 x 10²⁴ atoms

3 0

3 years ago

The lecturer compared the humans eye to a camera lens

Ilya [14]

An analogy is the closest way to compare something to another that may not be related so that would be my pick. If that’s not it I guess he could maybe be making an observational opinion about it? Good luck hope this helped. Analogy

5 0

3 years ago

The answer to this question

dedylja [7]

The solutions are the following :
12. C
13. A.

7 0

3 years ago

What is the reducing agent in the reaction Fe + AgNO3 → Fe(NO3)3 + Ag?

alekssr [168]

Answer:

Iron, Fe

explanation:

Iron reduces silver nitrate to silver.

3 0

3 years ago