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schepotkina [342]
3 years ago
10

four students measured the mass of a piece of metal whose accurate mass is 34.75g. their result are 34.2g,33.75g,35.0g and 34.69

g. what is the best estimate for the mass of the piece of metal? and why?
Chemistry
2 answers:
labwork [276]3 years ago
6 0

Answer:

34.69 g.

Explanation:

34.69 is closest to the true value 34.75.

dedylja [7]3 years ago
4 0

Answer:

the best estimate is 34.69 g

Explanation:

the best estimate is 34.69 gm because when it is rounded it becomes 34.70 gm which is near to actual weight 34.75 gms

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How many moles are present in 10.5 x 10^23 atoms of helium?
Usimov [2.4K]

10.5 \times  {10}^{23}
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3 years ago
What is the molecular formula of a hydrocarbon with M+ = 108? (Write the formula with no subscripts, e.g. C4H10.)
Sidana [21]

Explanation:

M+=108 is way of representing molecular formula of a compound indicating simple numbers of each type of atom in a molecule and there is no information about the structure.

Here it given the molecule is hydrocarbon with 8 carbon atom and 12 hydrogen atom. Thus the compound is C8H12.

C8H12 has one ring and two double bonds.

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4 years ago
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7 0
3 years ago
Can u guys help on 22. It will only take a min.
Anni [7]

Answer:

Alpha > beta>gamma

Explanation:

Comparing only the three common types of ionizing radiation, alpha particles have the greatest mass. Alpha particles have approximately four times the mass of a proton or neutron and approximately 8,000 times the mass of a beta particle.

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7 0
3 years ago
Read 2 more answers
Arrange the following compounds in order of increasing acidity, and explain the reasons for your choice of order. a. 2,4-dinitro
ludmilkaskok [199]

Compounds in order of increasing acidity will be written as d<c<b<a.

<h3>What is acidity?</h3>

The quantity of hydroxyl ions that a basic molecule may create in an aqueous solution is what is known as the acidity of bases. The quantity of hydronium ions that a substance may create in an aqueous solution determines how basic an acid is.

a, b are more acidic than c and d because of OH group attached to sp2 hybridised carbon which provide resonance stability for conjugate base

in c f has -I effect which increases acidity in a, NO2 has -m effect which increases acidity so increasing order is d<c<b<a

that is  cyclohexanol <  2,4-difluorocyclohexanol <  phenol < 2,4-dinitrophenol

to learn more about acidity go to -

brainly.com/question/19584961

#SPJ4

3 0
2 years ago
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