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wel
3 years ago
15

What is the best answer to report for ?

Chemistry
1 answer:
IrinaK [193]3 years ago
8 0

The best answer to report  is 2.900 g/ml (answer A)

explanation

The best answer to  report   must be in four significant figures. 2.900 g/ml is therefore the best answer to report since in is in four significant. zeros placed after other digits but behind a decimal point are significant figures.,theerfore 2.900 has four significant figures

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A mixture with medium sized particles that do not settle out is called
Alexandra [31]

Answer: colloid

Explanation:

Colloids are solutions in which small sized particles are suspended throughout the solution as they do not settle own their own. Colloids are defined as the mixtures where the size of the particle is within the range of 2nm to 1000 nm. In these mixtures, physical boundary is seen between the dispersed phase and dispersed medium.

Colloids are solutions with particle size intermediate between true solutions and suspensions. Suspensions have large sized particles which settle when left undisturbed for sometime and thus can be filtered off easily. The particle size in colloids is less and hence they do not settle under the effect of gravity.

7 0
2 years ago
What mass of AI2O3 forms, knowing the molar mass of Al2O3 is 102 g/mol ?
TiliK225 [7]

Question

What mass of Al₂O₃ form is produced if 25.00 g of aluminum (al) is reacted completely?, knowing the molar mass of Al₂O₃ is 102 g/mol?

Atomic mass of Al =27 and O = 16

The molar mass of Al₂O₃ = 102.

Mass of aluminium in 102 g of Al₂O₃ = 54 g

54 g Al => 102 g Al₂O₃

25g Al => x g Al₂O₃

x = 25*102/54 = 47.2 g Al₂O₃

To solve more questions on molar mass check here:

brainly.com/question/21334167

3 0
1 year ago
What happens to two substances when they dissolve?
bogdanovich [222]

Answer:

A solution is made when one substance called the solute "dissolves" into another substance called the solvent. Dissolving is when the solute breaks up from a larger crystal of molecules into much smaller groups or individual molecules. This break up is caused by coming into contact with the solvent

7 0
3 years ago
Describe a plan for finding what kind of a change each hammered bananas undergoes. Physical or chemical?
vesna_86 [32]
The hammered bananas will undergo a physical change when hammered, and both a physical and chemical change when put into liquid nitrogen. The will freeze and harden, causing them to be solidified once again, yet their temperature will lower exponentially, causing them to freeze. Physical change is when it hardens and the temperature drops. chemical when it freezes.
3 0
2 years ago
Hich formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)? (5 points)
mina [271]

Answer:

which formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)?

» <u>d.2 x molar mass of H + 2 x molar mass of O</u>

Explanation:

Since we've two hydrogen atoms and two oxygen atoms, we multiply each mass by 2

= (2 \times hydrogen) + (2 \times oxygen) \\  = (2 \times 1) + (2 \times 16) \\  = 2 + 32 \\  = 34 \: g

Which of the following statements best defines the actual yield of a reaction?

»<u> </u><u>d.The ratio of measured yield over stoichiometric yield</u>

4 0
2 years ago
Read 2 more answers
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