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Mariulka [41]
3 years ago
14

Explain why the scientist should carry out further tests on this colouring found in the drink?

Chemistry
2 answers:
irakobra [83]3 years ago
7 0

The solvent gives extra energy to pull up the sample and the sample will also dissolve in the solvent. That's why as precautionary measure start line should stay above the solvent in chromatography.

katrin2010 [14]3 years ago
4 0

if the scientist finds anything that does not match, they have to carry out further tests

it can guide the consumer's judgement purchase decision on too gently on what the believe the product may contain.

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Equal masses (in grams) of hydrogen gas and oxygen gas are reacted to form water. Which substance is limiting?
Sonbull [250]

Answer:

a. Oxygen gas is limiting

Explanation:

hydrogen gas and oxygen gas are reacted to form water

2H₂ + O₂  →  2H₂O

the above balanced equation shows that 2 moles of H₂ is required for 1 mole of O₂

Given equal masses of H₂ and O₂

assuming 'x' gm for each, no. of moles of each gas  =

no. of moles of H₂ = x/2 = 0.5x moles

no.of moles of O₂ = x/32 = 0.031x moles

This shows that no. of moles of O₂ is very less so O₂ will become the limiting reagent.

3 0
4 years ago
Read 2 more answers
What is the titration​
Inga [223]
Titration is the slow edition of one solution of unknown concentration to a noun volume up another solution of unknown concentration until the reaction reaches neutralization which is often indicated by a color change
7 0
3 years ago
When a 120g sample of aluminum absorbs 9612 J of energy its temperature increases from 298K to 388K. Find the specific heat of t
Iteru [2.4K]

Specific heat of Aluminium is 0.89 g/J

Explanation:

Step  1 :

Specific heat of a substance is the energy absorbed by a substance of unit mass when its temperature increases by one degree.

Energy Absorbed = Specific Heat * Mass of the substance * Temperature Difference

Step  2 :

It is given that 120 g sample absorbs 9612 J energy when the temperature increases from 298K to 388K.

Temperature Difference = 388 K - 298 K = 90 K

Step  3:

Specific Heat = (Energy Absorbed) ÷ (Mass of the substance * Temperature Difference)

Specific Heat = 9612 ÷  (120 * 90) = 0.89 grams / Joule

Step  4:

Answer:

Specific heat of Aluminium is 0.89 g/J

6 0
4 years ago
Intact cells of two unknown cell types were placed into solutions with different concentrations of NaCl. Type I cells swelled an
Bess [88]

Answer:

Cell Type I: Animal cell surrounded by a plasma membrane only.

Cell Type II: Plant cell surrounded by a plasma membrane and a cell wall.

Explanation:

Hello,

In this case, we must remember that animal cells are covered only by a plasma membrane, which is not enough to keep the cell from bursting as no limit for the inlet salt is established, causing it both to swell and burst. On the other hand, plant cells are covered by both a plasma membrane and a cell wall which contributive effect allow the inlet of the salt but prevent the cell to burst as the cell wall is rigid. In such a way, based on the described situation, one infers that the cell type I is an animal cell surrounded by a plasma membrane only the cell type II is a plant cell surrounded by a plasma membrane and a cell wall.

Best regards.

3 0
3 years ago
If an atom should form from its constituent particles,
tia_tia [17]

Answer:

(b) matter is lost and energy is released

Explanation:

When atoms are being formed from its constituent components it weighs less this is called mass defect so the answer would be (b) matter is lost and energy is released.

8 0
3 years ago
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