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2 years ago

Identify each change as either physical or chemical breaking a pencil in half

2 answers:

7 0

Answer:
Breaking A Pencil In Half - Physical Change

You are changing the form of the pencil. You aren't turning it into something else like an eraser, you are just changing it's form. It still has the same use just looks and feels differently.

-Brainly Answerer

Vesna [10]2 years ago

3 0

It is a physical change because you are not changing any of its properties. You still have a pencil, just slightly smaller. If you are only changing the shape and not the properties of a substance, it is a physical change

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slega [8]

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2 years ago

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3 years ago

24) What is momentum? *

sergiy2304 [10]

Answer:

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2 years ago

Which formula can be used to calculate the theoretical yield?

Bas_tet [7]

Answer:

Option C, (Actual yield ÷ percent yield) × 100

Explanation:

Theoretical yield is defined as the total amount of product formed for given reactants in a chemical reaction. It is an ideal case which assumes no exceptions or wastage.

The mathematical relation between the actual yield, percent yield and theoretical yield is as follows -

$P.Y. = \frac{M_{A.Y.}}{M_{T.Y.}} * 100$

Where

P.Y. represents the percent yield a

M A.Y. represents the mass obtained from actual yield

M T.Y. represents the mass obtained from theoretical yield

Hence, if we rearrange the formula, we get -

$M_{T.Y.} = \frac{M_{A.Y.}}{P.Y.} * 100$

Hence, option C is correct

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2 years ago

A 5.0-gram sample of Fe(s) is to be placed in 100. milliliters of HCl(aq). Which changes will result in the fastest rate of reac

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