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STatiana [176]
4 years ago
8

Can anyone help me with this?

Chemistry
1 answer:
stiv31 [10]4 years ago
8 0

Go To ScHoOl tO LeArN

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Blank can be made in the field or in the laboratory
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It would most likely be a observation or hypothesis
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3 years ago
How many atoms are in 12 moles of iron?
Murljashka [212]

Explanation: The atomic mass of iron (Fe) is 55.85 amu. The atomic mass of radium (Ra) is 226 amu. One mole of atoms of any element contains 6.022 X 1023 atoms, regardless of the type of element. The mass of one mole of an element depends on what that element is, and is equal to the atom mass of that element in grams.

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3 years ago
Plan a chromotography experiment to investigate the colours in an ink​
Usimov [2.4K]

Answer:Step 1: Gather the Needed Materials (coffee Filter, Pencil, Beaker, Water Soluble Pen/marker, Water) Step 2: Cut a Strip of Filter Paper From the Coffee Filter and Using the Marker Draw a Thick Line Near the Bottom of the Filter Paper- About 1/4 Inch From the Bottom. Step 3: Allow the Water to Move Up the Paper for Approx. 5 Minutes and Then Remove the Strip From the Water Step 4: Students Should Identify the Individual Colors in the Chromatogram That Make Up the Markers Unique Mix of Ink.  Step 5: Once Students Have Mastered the Technique Its Time to Put Their Skills to the Test in "The Case of the Celebrity Dog-napping"  Step 7: Write the Ransom Note on a Piece of Filter Paper in One of the Suspect Inks.

Explanation: Chromatography is the physical separation of a mixture into its individual components. This lesson integrates mixtures, solutions & solubility into an activity where students will identify the solute & the solvent. Because chromatography can be used to separate the components of inks & dyes, students are able to identify the unique "recipe" that makes up the mixture of a specific brand of pen. After the students are taught the ink chromatography technique, the fun can continue with a mini forensic investigation, "The Case of the Celebrity Dog-napping".

hopes this helps

6 0
3 years ago
Which of these changes could be classified as producing a chemical changes
podryga [215]

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hhhhhhhh

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6 0
3 years ago
Read 2 more answers
It was found that 2.35 g of a compound of phosphorus and chlorine contained 0.539 g of phosphorus. What are the percentages by m
igor_vitrenko [27]

Answer:

Explanation:

P = 2.35g

Cl= 0.539 g

% MASS = mass of  X/ mass of a compound

 % mass of P =   2.35 / (2.35+ 0.539) =  81.34%

  % mass of Cl =  0.539 /(2.35+ 0.539) =  18.66 %

3 0
4 years ago
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