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3 years ago

6

A specific type of physical change is a ________ change.

2 answers:

Juliette [100K]3 years ago

7 0

C Size
A change of size in any object is a physical change. So, a specific type of physical change is a SIZE change.

Roman55 [17]3 years ago

3 0

<span>A specific type of physical change is a ________ change

</span><span>D. phase
</span><span>
Example of Phase change is changing from Solid to liquid and Liquid to gas.

It is a physical change because the chemical nature of the compound involved is still the same. There is no introduction of new elements into the compound.
</span>

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The compound responsible for the characteristic smell of garlic is allicin, c6h10os2. the mass of 1.00 mol of allicin, rounded t

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What is the mass of 1.7 × 1023 atoms of zinc (Zn)?

Rudiy27

Number of moles is defined as the ratio of given mass in g to the molar mass.

The mathematical formula is:

Number of moles = $\frac{given mass in g}{molar mass}$ (1)

Number of zinc atoms is equal to $1.7\times10^{23}$ , by Avogadro number, number of moles can be calculated.

As, 1 mol= $6.022\times10^{23}$ atoms, hence,

$1.7\times10^{23}\times\frac{1 mol}{6.022\times10^{23} }$

= 0.2822 mol

Now, from formula (1), calculate mass in g (molar mass of zinc = 65.4 g/mol)

0.2822 mol = $\frac{mass in g}{65.4 g/mol}$

mass in g = ${0.2822 mol \times 65.4 g/mol$

= 18.45588 g

Thus, by rounding off the above number, it will come near about 19 g approximately.

Hence, option (C) is the correct answer.

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4 years ago