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3 years ago

10

Which of the following units is best when measuring the length of an object?

2 answers:

podryga [215]3 years ago

8 0

Answer:metres

Explanation:It would be best to measure the length of an object in metric system such as millimeter, centimeter, mere etc..

umka21 [38]3 years ago

7 0

The best unit to measure the length of an object is meters.

Answer: Option A

<u>Explanation: </u>

Length is defined as the distance covered by any object from one end to another end of the object. It can also be termed as single dimension of the object. It is a measuring variable and like all measuring variables, it also has SI unit. The SI unit to determine the length of any object is meter.

So among the given options, cubic meters can't be the correct unit for length because it has three dimensional variable while length is a single dimensional variable. Similarly, kilograms is the unit of weight or mass of any object and kilogram per cubic meter is for density of any object. Thus the best unit for measuring the object's length is meters.

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How much heat is absorbed when 447 g of water , Cp = 4.184 J/goC, goes from 25.0 oC to 35.0 oC?

Digiron [165]

Answer:

The answer to your question is Q = 18702.5 J

Explanation:

Data

mass of water = m = 447 g

Cp = 4.184 J/g°C

Temperature 1 = T1 = 25°C

Temperature 2 = T2 = 35°C

Heat = Q = ? Joules

Process

1.- Write the formula to calculate heat

Q = mCp(T2 - T1)

2.- Substitution

Q = (447)(4.184)(35 - 25)

3.- Simplification

Q = (447)(4.184)(10)

4.- Result

Q = 18702.5 J

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1 year ago

For which type of titration will the ph be acidic at the equivalence point?

ANTONII [103]

It is
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2 years ago

Read 2 more answers

pshichka [43]

Answer:

"2.48 mole" of H₂ are formed. A further explanation is provided below.

Explanation:

The given values are:

Mole of Al,

= 3.22 mole

Mole of HBr,

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Now,

(a)

The number of mole of H₂ are:

⇒ $\frac{Mole \ of \ H_2}{3} =\frac{Mole \ of HBr}{6}$

or,

⇒ $Mole \ of \ H_2=\frac{1}{2}\times Mole \ of \ HBr$

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(b)

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= $HBr$

(c)

The excess reactant is:

= $Al$

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2 years ago